| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | namespace App\Common\Config; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use Symfony\Component\Config\Loader\FileLoader; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | use Symfony\Component\Config\Exception\FileLoaderLoadException; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | use Symfony\Component\Config\Definition\Processor; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  * Class PHPConfigLoader | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  |  * @package App\Common\Config | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | class PHPConfigLoader extends FileLoader | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |      * Import all loadable resources | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |      * @return array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |      * @throws FileLoaderLoadException | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |     public function importAll() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |         // in order to import all we need to have locator to locate these "all" | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |         // locator need | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |         if (empty($this->locator)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |             throw new FileLoaderLoadException("importAll()"); | 
                            
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                | 28 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |         // locator must be capable of locating all | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |         if (!is_callable([$this->locator, 'locateAll'])) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |             throw new FileLoaderLoadException("locateAll()"); | 
                            
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                | 33 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |         // build list of 'all' files | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |         $files = $this->locator->locateAll(); | 
                            
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                | 37 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |         // and now try to import configuration from this list of 'all' files | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |         $res = []; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |         foreach ($files as $file) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |             if ($this->supports($file)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |                 // file is supported - load/import it | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |                 $config = $this->load($file); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |                 if (!empty($config['definition'])) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  |                     // loaded config can be verified | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |                     $processor = new Processor(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |                     $configDefinition = new $config['definition'](); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |                     // process config according to specified definition | 
                            
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                | 50 |  |  | //file_put_contents('/tmp/log', print_r($config, true), FILE_APPEND); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |                     $config = $processor->processConfiguration( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |                         $configDefinition, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |                         [$config] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |                     ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  | //file_put_contents('/tmp/log', print_r($config, true), FILE_APPEND); | 
                            
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                | 56 |  |  |                 } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |                 // combine all configs into one "unified general config" | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |                 $res = array_merge($res, $config); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |         // array of configuration | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |         return $res; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |      * @inheritdoc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |     public function load($resource, $type = null) | 
                            
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                | 71 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |         // for PHP file load process is quite simple - just return config file content | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  |         return require_once $resource; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |      * Returns whether current loader supports specified resource load | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |      * @param mixed $resource path to config file | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |      * @param null $type unsused | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |      * @return bool | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 82 |  |  |      */ | 
            
                                                        
            
                                    
            
            
                | 83 |  |  |     public function supports($resource, $type = null) | 
            
                                                        
            
                                    
            
            
                | 84 |  |  |     { | 
            
                                                        
            
                                    
            
            
                | 85 |  |  |         // $resource is expected to be path to config file | 
            
                                                        
            
                                    
            
            
                | 86 |  |  |         if (!is_string($resource)) { | 
            
                                                        
            
                                    
            
            
                | 87 |  |  |             return false; | 
            
                                                        
            
                                    
            
            
                | 88 |  |  |         } | 
            
                                                        
            
                                    
            
            
                | 89 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 90 |  |  |         // specified config file should be readable | 
            
                                                        
            
                                    
            
            
                | 91 |  |  |         if (!@is_file($resource) || !@is_readable($resource)) { | 
            
                                                        
            
                                    
            
            
                | 92 |  |  |             return false; | 
            
                                                        
            
                                    
            
            
                | 93 |  |  |         } | 
            
                                                        
            
                                    
            
            
                | 94 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 95 |  |  |         // simple check - PHP loader accepts PHP files, thus let's check file extension to be 'php' | 
            
                                                        
            
                                    
            
            
                | 96 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 97 |  |  |         // fetch config file extension | 
            
                                                        
            
                                    
            
            
                | 98 |  |  |         $extension = pathinfo($resource, PATHINFO_EXTENSION); | 
            
                                                        
            
                                    
            
            
                | 99 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 100 |  |  |         // PHP loader accepts PHP files | 
            
                                                        
            
                                    
            
            
                | 101 |  |  |         return  $extension == 'php'; | 
            
                                                        
            
                                    
            
            
                | 102 |  |  |     } | 
            
                                                        
            
                                    
            
            
                | 103 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 104 |  |  |  | 
            
                        
PHP provides two ways to mark string literals. Either with single quotes
'literal'or with double quotes"literal". The difference between these is that string literals in double quotes may contain variables with are evaluated at run-time as well as escape sequences.String literals in single quotes on the other hand are evaluated very literally and the only two characters that needs escaping in the literal are the single quote itself (
\') and the backslash (\\). Every other character is displayed as is.Double quoted string literals may contain other variables or more complex escape sequences.
will print an indented:
Single is ValueIf your string literal does not contain variables or escape sequences, it should be defined using single quotes to make that fact clear.
For more information on PHP string literals and available escape sequences see the PHP core documentation.