| 1 |  |  | <?php | 
                            
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                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | use SCI\HookRegistry; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  | use SCI\Options; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use SMW\ApplicationFactory; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  * @see https://github.com/SemanticMediaWiki/SemanticCite/ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  * @defgroup SCI Semantic Citation | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | if ( !defined( 'MEDIAWIKI' ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | 	die( 'This file is part of the SemanticCite extension, it is not a valid entry point.' ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  | if ( defined( 'SCI_VERSION' ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | 	// Do not initialize more than once. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  | 	return 1; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  | } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  | SemanticCite::load(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |  * @codeCoverageIgnore | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  | class SemanticCite { | 
                            
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                | 27 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  | 	 * @since 1.3 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  | 	 * @note It is expected that this function is loaded before LocalSettings.php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  | 	 * to ensure that settings and global functions are available by the time | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  | 	 * the extension is activated. | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 34 |  |  | 	 */ | 
            
                                                                        
                            
            
                                    
            
            
                | 35 |  |  | 	public static function load() { | 
                            
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                | 36 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 37 |  |  | 		if ( is_readable( __DIR__ . '/vendor/autoload.php' ) ) { | 
            
                                                                        
                            
            
                                    
            
            
                | 38 |  |  | 			include_once __DIR__ . '/vendor/autoload.php'; | 
            
                                                                        
                            
            
                                    
            
            
                | 39 |  |  | 		} | 
            
                                                                        
                            
            
                                    
            
            
                | 40 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 41 |  |  | 		// Load DefaultSettings | 
            
                                                                        
                            
            
                                    
            
            
                | 42 |  |  | 		require_once __DIR__ . '/DefaultSettings.php'; | 
            
                                                                        
                            
            
                                    
            
            
                | 43 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 44 |  |  | 		// In case extension.json is being used, the the succeeding steps are | 
            
                                                                        
                            
            
                                    
            
            
                | 45 |  |  | 		// expected to be handled by the ExtensionRegistry | 
            
                                                                        
                            
            
                                    
            
            
                | 46 |  |  | 		self::initExtension(); | 
            
                                                                        
                            
            
                                    
            
            
                | 47 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 48 |  |  | 		$GLOBALS['wgExtensionFunctions'][] = function() { | 
            
                                                                        
                            
            
                                    
            
            
                | 49 |  |  | 			self::onExtensionFunction(); | 
            
                                                                        
                            
            
                                    
            
            
                | 50 |  |  | 		}; | 
            
                                                                        
                            
            
                                    
            
            
                | 51 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  | 	 * @since 1.1 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  | 	public static function initExtension() { | 
                            
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                | 57 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  | 		define( 'SCI_VERSION', '1.3.0-alpha' ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  | 		// Register the extension | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  | 		$GLOBALS['wgExtensionCredits']['semantic'][ ] = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  | 			'path'           => __FILE__, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  | 			'name'           => 'Semantic Cite', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  | 			'author'         => array( 'James Hong Kong' ), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  | 			'url'            => 'https://github.com/SemanticMediaWiki/SemanticCite/', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  | 			'descriptionmsg' => 'sci-desc', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  | 			'version'        => SCI_VERSION, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  | 			'license-name'   => 'GPL-2.0+', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  | 		// Register message files | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  | 		$GLOBALS['wgMessagesDirs']['SemanticCite'] = __DIR__ . '/i18n'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  | 		$GLOBALS['wgExtensionMessagesFiles']['SemanticCiteMagic'] = __DIR__ . '/i18n/SemanticCite.magic.php'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  | 		$GLOBALS['wgExtensionMessagesFiles']['SemanticCiteAlias'] = __DIR__ . '/i18n/SemanticCite.alias.php'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  | 		$GLOBALS['wgSpecialPages']['FindCitableMetadata'] = '\SCI\Specials\SpecialFindCitableMetadata'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  | 		// Restrict access to the meta search for registered users only | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  | 		$GLOBALS['wgAvailableRights'][] = 'sci-metadatasearch'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  | 		$GLOBALS['wgGroupPermissions']['user']['sci-metadatasearch'] = true; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  | 		// Register resource files | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  | 		$GLOBALS['wgResourceModules']['ext.scite.styles'] = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  | 			'styles'  => 'res/scite.styles.css', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  | 			'localBasePath' => __DIR__ , | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  | 			'remoteExtPath' => 'SemanticCite', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  | 			'position' => 'top', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  | 			'group'    => 'ext.smw', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  | 			'targets' => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  | 				'mobile', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  | 				'desktop' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  | 			) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  | 		$GLOBALS['wgResourceModules']['ext.scite.metadata'] = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  | 			'scripts' => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  | 				'res/scite.text.selector.js', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  | 				'res/scite.page.creator.js' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  | 			), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  | 			'localBasePath' => __DIR__ , | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  | 			'remoteExtPath' => 'SemanticCite', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  | 			'position' => 'top', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  | 			'group'    => 'ext.smw', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  | 			'dependencies'  => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  | 				'ext.scite.styles', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  | 				'mediawiki.api' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  | 			), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  | 			'targets' => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  | 				'mobile', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  | 				'desktop' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  | 			) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  | 		$GLOBALS['wgResourceModules']['ext.scite.tooltip'] = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  | 			'scripts' => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  | 				'res/scite.tooltip.js' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  | 			), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  | 			'localBasePath' => __DIR__ , | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  | 			'remoteExtPath' => 'SemanticCite', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  | 			'dependencies'  => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  | 				'onoi.qtip', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  | 				'onoi.blobstore', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  | 				'onoi.util', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  | 				'ext.scite.styles', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  | 				'mediawiki.api.parse' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  | 			), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  | 			'messages' => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  | 				'sci-tooltip-citation-lookup-failure', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  | 				'sci-tooltip-citation-lookup-failure-multiple' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  | 			), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  | 			'targets' => array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  | 				'mobile', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  | 				'desktop' | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  | 			) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  | 		self::onBeforeExtensionFunction(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  | 	 * Register hooks that require to be listed as soon as possible and preferable | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  | 	 * before the execution of onExtensionFunction | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  | 	 * @since 1.3 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 |  |  | 	public static function onBeforeExtensionFunction() { | 
                            
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                | 147 |  |  | 		$GLOBALS['wgHooks']['SMW::Config::BeforeCompletion'][] = '\SCI\HookRegistry::onBeforeConfigCompletion'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  | 	 * @since 1.3 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  | 	public static function doCheckRequirements() { | 
                            
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                | 154 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  | 		if ( version_compare( $GLOBALS[ 'wgVersion' ], '1.24', 'lt' ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  | 			die( '<b>Error:</b> This version of <a href="https://github.com/SemanticMediaWiki/SemanticCite/">SemanticCite</a> is only compatible with MediaWiki 1.24 or above. You need to upgrade MediaWiki first.' ); | 
                            
                    |  |  |  | 
                                                                                        
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                | 157 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  | 		if ( !defined( 'SMW_VERSION' ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 |  |  | 			die( '<b>Error:</b> <a href="https://github.com/SemanticMediaWiki/SemanticCite/">Semantic Cite</a> requires the <a href="https://github.com/SemanticMediaWiki/SemanticMediaWiki/">Semantic MediaWiki</a> extension, please enable or install the extension first.' ); | 
                            
                    |  |  |  | 
                                                                                        
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                | 161 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  | 	 * @since 1.1 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 |  |  | 	public static function onExtensionFunction() { | 
                            
                    |  |  |  | 
                                                                                        
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                | 168 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  | 		// Check requirements after LocalSetting.php has been processed | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 |  |  | 		self::doCheckRequirements(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  | 		// Require a global because MW's Special page is missing an interface | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 |  |  | 		// to inject dependencies | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  | 		$GLOBALS['scigCachePrefix'] = $GLOBALS['wgCachePrefix'] === false ? wfWikiID() : $GLOBALS['wgCachePrefix']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 176 |  |  | 		$configuration = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  | 			'numberOfReferenceListColumns'       => $GLOBALS['scigNumberOfReferenceListColumns'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  | 			'browseLinkToCitationResource'       => $GLOBALS['scigBrowseLinkToCitationResource'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  | 			'showTooltipForCitationReference'    => $GLOBALS['scigShowTooltipForCitationReference'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  | 			'tooltipRequestCacheTTL'             => $GLOBALS['scigTooltipRequestCacheTTLInSeconds'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  | 			'citationReferenceCaptionFormat'     => $GLOBALS['scigCitationReferenceCaptionFormat'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  | 			'referenceListType'                  => $GLOBALS['scigReferenceListType'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  | 			'enabledStrictParserValidation'      => $GLOBALS['scigEnabledStrictParserValidation'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  | 			'cachePrefix'                        => $GLOBALS['scigCachePrefix'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  | 			'enabledCitationTextChangeUpdateJob' => $GLOBALS['scigEnabledCitationTextChangeUpdateJob'], | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  | 			'responsiveMonoColumnCharacterBoundLength' => $GLOBALS['scigResponsiveMonoColumnCharacterBoundLength'] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  | 		$applicationFactory = ApplicationFactory::getInstance(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  | 		$hookRegistry = new HookRegistry( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  | 			$applicationFactory->getStore(), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  | 			$applicationFactory->newCacheFactory()->newMediaWikiCompositeCache( $GLOBALS['scigReferenceListCacheType'] ), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  | 			new Options( $configuration ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  | 		$hookRegistry->register(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  | 	 * @since 1.1 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  | 	 * @return string|null | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  | 	public static function getVersion() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  | 		return SCI_VERSION; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  |  | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 209 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 210 |  |  |  | 
            
                        
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.