wimg /
PHPCompatibility
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like PHPCompatibility_Sniff often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use PHPCompatibility_Sniff, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 22 | abstract class PHPCompatibility_Sniff implements PHP_CodeSniffer_Sniff |
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| 23 | { |
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| 24 | |||
| 25 | /* The testVersion configuration variable may be in any of the following formats: |
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| 26 | * 1) Omitted/empty, in which case no version is specified. This effectively |
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| 27 | * disables all the checks provided by this standard. |
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| 28 | * 2) A single PHP version number, e.g. "5.4" in which case the standard checks that |
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| 29 | * the code will run on that version of PHP (no deprecated features or newer |
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| 30 | * features being used). |
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| 31 | * 3) A range, e.g. "5.0-5.5", in which case the standard checks the code will run |
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| 32 | * on all PHP versions in that range, and that it doesn't use any features that |
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| 33 | * were deprecated by the final version in the list, or which were not available |
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| 34 | * for the first version in the list. |
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| 35 | * PHP version numbers should always be in Major.Minor format. Both "5", "5.3.2" |
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| 36 | * would be treated as invalid, and ignored. |
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| 37 | * This standard doesn't support checking against PHP4, so the minimum version that |
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| 38 | * is recognised is "5.0". |
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| 39 | */ |
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| 40 | |||
| 41 | private function getTestVersion() |
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| 42 | { |
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| 43 | /** |
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| 44 | * var $arrTestVersions will hold an array containing min/max version of PHP |
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| 45 | * that we are checking against (see above). If only a single version |
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| 46 | * number is specified, then this is used as both the min and max. |
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| 47 | */ |
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| 48 | static $arrTestVersions = array(); |
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| 49 | |||
| 50 | $testVersion = trim(PHP_CodeSniffer::getConfigData('testVersion')); |
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| 51 | |||
| 52 | if (!isset($arrTestVersions[$testVersion]) && !empty($testVersion)) { |
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| 53 | |||
| 54 | $arrTestVersions[$testVersion] = array(null, null); |
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| 55 | if (preg_match('/^\d+\.\d+$/', $testVersion)) { |
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| 56 | $arrTestVersions[$testVersion] = array($testVersion, $testVersion); |
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| 57 | } |
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| 58 | elseif (preg_match('/^(\d+\.\d+)\s*-\s*(\d+\.\d+)$/', $testVersion, |
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| 59 | $matches)) |
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| 60 | { |
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| 61 | if (version_compare($matches[1], $matches[2], '>')) { |
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| 62 | trigger_error("Invalid range in testVersion setting: '" |
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| 63 | . $testVersion . "'", E_USER_WARNING); |
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| 64 | } |
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| 65 | else { |
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| 66 | $arrTestVersions[$testVersion] = array($matches[1], $matches[2]); |
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| 67 | } |
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| 68 | } |
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| 69 | elseif (!$testVersion == '') { |
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| 70 | trigger_error("Invalid testVersion setting: '" . $testVersion |
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| 71 | . "'", E_USER_WARNING); |
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| 72 | } |
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| 73 | } |
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| 74 | |||
| 75 | if (isset($arrTestVersions[$testVersion])) { |
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| 76 | return $arrTestVersions[$testVersion]; |
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| 77 | } |
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| 78 | else { |
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| 79 | return array(null, null); |
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| 80 | } |
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| 81 | } |
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| 82 | |||
| 83 | View Code Duplication | public function supportsAbove($phpVersion) |
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| 96 | |||
| 97 | View Code Duplication | public function supportsBelow($phpVersion) |
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| 110 | |||
| 111 | |||
| 112 | /** |
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| 113 | * Strip quotes surrounding an arbitrary string. |
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| 114 | * |
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| 115 | * Intended for use with the content of a T_CONSTANT_ENCAPSED_STRING. |
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| 116 | * |
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| 117 | * @param string $string The raw string. |
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| 118 | * |
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| 119 | * @return string String without quotes around it. |
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| 120 | */ |
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| 121 | public function stripQuotes($string) { |
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| 124 | |||
| 125 | |||
| 126 | /** |
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| 127 | * Returns the name(s) of the interface(s) that the specified class implements. |
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| 128 | * |
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| 129 | * Returns FALSE on error or if there are no implemented interface names. |
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| 130 | * |
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| 131 | * {@internal Duplicate of same method as introduced in PHPCS 2.7. |
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| 132 | * Once the minimum supported PHPCS version for this sniff library goes beyond |
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| 133 | * that, this method can be removed and call to it replaced with |
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| 134 | * `$phpcsFile->findImplementedInterfaceNames($stackPtr)` calls.}} |
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| 135 | * |
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| 136 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 137 | * @param int $stackPtr The position of the class token. |
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| 138 | * |
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| 139 | * @return array|false |
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| 140 | */ |
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| 141 | public function findImplementedInterfaceNames(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 188 | |||
| 189 | |||
| 190 | /** |
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| 191 | * Checks if a function call has parameters. |
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| 192 | * |
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| 193 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 194 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 195 | * |
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| 196 | * @link https://github.com/wimg/PHPCompatibility/issues/120 |
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| 197 | * @link https://github.com/wimg/PHPCompatibility/issues/152 |
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| 198 | * |
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| 199 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 200 | * @param int $stackPtr The position of the function call token. |
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| 201 | * |
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| 202 | * @return bool |
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| 203 | */ |
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| 204 | public function doesFunctionCallHaveParameters(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 237 | |||
| 238 | |||
| 239 | /** |
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| 240 | * Count the number of parameters a function call has been passed. |
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| 241 | * |
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| 242 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 243 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 244 | * |
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| 245 | * @link https://github.com/wimg/PHPCompatibility/issues/111 |
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| 246 | * @link https://github.com/wimg/PHPCompatibility/issues/114 |
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| 247 | * @link https://github.com/wimg/PHPCompatibility/issues/151 |
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| 248 | * |
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| 249 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 250 | * @param int $stackPtr The position of the function call token. |
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| 251 | * |
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| 252 | * @return int |
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| 253 | */ |
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| 254 | public function getFunctionCallParameterCount(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 262 | |||
| 263 | |||
| 264 | /** |
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| 265 | * Get information on all parameters passed to a function call. |
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| 266 | * |
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| 267 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 268 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 269 | * |
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| 270 | * Will return an multi-dimentional array with the start token pointer, end token |
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| 271 | * pointer and raw parameter value for all parameters. Index will be 1-based. |
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| 272 | * If no parameters are found, will return an empty array. |
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| 273 | * |
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| 274 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 275 | * @param int $stackPtr The position of the function call token. |
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| 276 | * |
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| 277 | * @return array |
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| 278 | */ |
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| 279 | public function getFunctionCallParameters(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 351 | |||
| 352 | |||
| 353 | /** |
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| 354 | * Get information on a specific parameter passed to a function call. |
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| 355 | * |
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| 356 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 357 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 358 | * |
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| 359 | * Will return a array with the start token pointer, end token pointer and the raw value |
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| 360 | * of the parameter at a specific offset. |
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| 361 | * If the specified parameter is not found, will return false. |
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| 362 | * |
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| 363 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 364 | * @param int $stackPtr The position of the function call token. |
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| 365 | * @param int $paramOffset The 1-based index position of the parameter to retrieve. |
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| 366 | * |
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| 367 | * @return array|false |
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| 368 | */ |
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| 369 | public function getFunctionCallParameter(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $paramOffset) |
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| 380 | |||
| 381 | |||
| 382 | /** |
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| 383 | * Verify whether a token is within a scoped condition. |
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| 384 | * |
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| 385 | * If the optional $validScopes parameter has been passed, the function |
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| 386 | * will check that the token has at least one condition which is of a |
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| 387 | * type defined in $validScopes. |
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| 388 | * |
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| 389 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 390 | * @param int $stackPtr The position of the token. |
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| 391 | * @param array|int $validScopes Optional. Array of valid scopes |
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| 392 | * or int value of a valid scope. |
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| 393 | * |
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| 394 | * @return bool Without the optional $scopeTypes: True if within a scope, false otherwise. |
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| 395 | * If the $scopeTypes are set: True if *one* of the conditions is a |
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| 396 | * valid scope, false otherwise. |
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| 397 | */ |
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| 398 | public function tokenHasScope(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $validScopes = null) |
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| 436 | |||
| 437 | |||
| 438 | /** |
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| 439 | * Verify whether a token is within a class scope. |
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| 440 | * |
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| 441 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 442 | * @param int $stackPtr The position of the token. |
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| 443 | * @param bool $strict Whether to strictly check for the T_CLASS |
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| 444 | * scope or also accept interfaces and traits |
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| 445 | * as scope. |
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| 446 | * |
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| 447 | * @return bool True if within class scope, false otherwise. |
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| 448 | */ |
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| 449 | public function inClassScope(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $strict = true) |
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| 459 | |||
| 460 | |||
| 461 | /** |
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| 462 | * Returns the fully qualified class name for a new class instantiation. |
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| 463 | * |
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| 464 | * Returns an empty string if the class name could not be reliably inferred. |
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| 465 | * |
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| 466 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 467 | * @param int $stackPtr The position of a T_NEW token. |
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| 468 | * |
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| 469 | * @return string |
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| 470 | */ |
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| 471 | public function getFQClassNameFromNewToken(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 503 | |||
| 504 | |||
| 505 | /** |
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| 506 | * Returns the fully qualified name of the class that the specified class extends. |
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| 507 | * |
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| 508 | * Returns an empty string if the class does not extend another class or if |
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| 509 | * the class name could not be reliably inferred. |
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| 510 | * |
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| 511 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 512 | * @param int $stackPtr The position of a T_CLASS token. |
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| 513 | * |
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| 514 | * @return string |
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| 515 | */ |
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| 516 | public function getFQExtendedClassName(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 536 | |||
| 537 | |||
| 538 | /** |
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| 539 | * Returns the class name for the static usage of a class. |
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| 540 | * This can be a call to a method, the use of a property or constant. |
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| 541 | * |
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| 542 | * Returns an empty string if the class name could not be reliably inferred. |
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| 543 | * |
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| 544 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 545 | * @param int $stackPtr The position of a T_NEW token. |
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| 546 | * |
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| 547 | * @return string |
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| 548 | */ |
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| 549 | public function getFQClassNameFromDoubleColonToken(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 595 | |||
| 596 | |||
| 597 | /** |
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| 598 | * Get the Fully Qualified name for a class/function/constant etc. |
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| 599 | * |
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| 600 | * Checks if a class/function/constant name is already fully qualified and |
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| 601 | * if not, enrich it with the relevant namespace information. |
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| 602 | * |
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| 603 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 604 | * @param int $stackPtr The position of the token. |
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| 605 | * @param string $name The class / function / constant name. |
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| 606 | * |
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| 607 | * @return string |
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| 608 | */ |
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| 609 | public function getFQName(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $name) |
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| 630 | |||
| 631 | |||
| 632 | /** |
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| 633 | * Is the class/function/constant name namespaced or global ? |
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| 634 | * |
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| 635 | * @param string $FQName Fully Qualified name of a class, function etc. |
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| 636 | * I.e. should always start with a `\` ! |
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| 637 | * |
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| 638 | * @return bool True if namespaced, false if global. |
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| 639 | */ |
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| 640 | public function isNamespaced($FQName) { |
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| 647 | |||
| 648 | |||
| 649 | /** |
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| 650 | * Determine the namespace name an arbitrary token lives in. |
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| 651 | * |
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| 652 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 653 | * @param int $stackPtr The token position for which to determine the namespace. |
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| 654 | * |
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| 655 | * @return string Namespace name or empty string if it couldn't be determined or no namespace applies. |
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| 656 | */ |
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| 657 | public function determineNamespace(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 707 | |||
| 708 | /** |
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| 709 | * Get the complete namespace name for a namespace declaration. |
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| 710 | * |
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| 711 | * For hierarchical namespaces, the name will be composed of several tokens, |
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| 712 | * i.e. MyProject\Sub\Level which will be returned together as one string. |
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| 713 | * |
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| 714 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 715 | * @param int|bool $stackPtr The position of a T_NAMESPACE token. |
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| 716 | * |
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| 717 | * @return string|false Namespace name or false if not a namespace declaration. |
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| 718 | * Namespace name can be an empty string for global namespace declaration. |
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| 719 | */ |
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| 720 | public function getDeclaredNamespaceName(PHP_CodeSniffer_File $phpcsFile, $stackPtr ) |
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| 760 | |||
| 761 | |||
| 762 | /** |
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| 763 | * Returns the method parameters for the specified T_FUNCTION token. |
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| 764 | * |
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| 765 | * Each parameter is in the following format: |
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| 766 | * |
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| 767 | * <code> |
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| 768 | * 0 => array( |
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| 769 | * 'name' => '$var', // The variable name. |
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| 770 | * 'pass_by_reference' => false, // Passed by reference. |
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| 771 | * 'type_hint' => string, // Type hint for array or custom type |
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| 772 | * ) |
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| 773 | * </code> |
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| 774 | * |
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| 775 | * Parameters with default values have an additional array index of |
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| 776 | * 'default' with the value of the default as a string. |
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| 777 | * |
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| 778 | * {@internal Duplicate of same method as contained in the `PHP_CodeSniffer_File` |
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| 779 | * class, but with some improvements which were only introduced in PHPCS 2.7. |
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| 780 | * Once the minimum supported PHPCS version for this sniff library goes beyond |
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| 781 | * that, this method can be removed and calls to it replaced with |
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| 782 | * `$phpcsFile->getMethodParameters($stackPtr)` calls.}} |
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| 783 | * |
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| 784 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 785 | * @param int $stackPtr The position in the stack of the T_FUNCTION token |
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| 786 | * to acquire the parameters for. |
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| 787 | * |
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| 788 | * @return array|false |
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| 789 | * @throws PHP_CodeSniffer_Exception If the specified $stackPtr is not of |
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| 790 | * type T_FUNCTION. |
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| 791 | */ |
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| 792 | public function getMethodParameters(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 937 | |||
| 938 | }//end class |
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| 939 |
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.