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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| 82 | |||
| 83 | View Code Duplication | public function supportsAbove($phpVersion) |
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| 84 | { |
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| 85 | $testVersion = $this->getTestVersion(); |
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| 86 | $testVersion = $testVersion[1]; |
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| 87 | |||
| 88 | if (is_null($testVersion) |
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| 89 | || version_compare($testVersion, $phpVersion) >= 0 |
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| 90 | ) { |
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| 91 | return true; |
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| 92 | } else { |
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| 93 | return false; |
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| 94 | } |
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| 95 | }//end supportsAbove() |
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| 96 | |||
| 97 | View Code Duplication | public function supportsBelow($phpVersion) |
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| 98 | { |
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| 99 | $testVersion = $this->getTestVersion(); |
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| 100 | $testVersion = $testVersion[0]; |
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| 101 | |||
| 102 | if (!is_null($testVersion) |
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| 103 | && version_compare($testVersion, $phpVersion) <= 0 |
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| 104 | ) { |
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| 105 | return true; |
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| 106 | } else { |
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| 107 | return false; |
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| 108 | } |
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| 109 | }//end supportsBelow() |
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| 110 | |||
| 111 | /** |
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| 112 | * Returns the name(s) of the interface(s) that the specified class implements. |
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| 113 | * |
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| 114 | * Returns FALSE on error or if there are no implemented interface names. |
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| 115 | * |
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| 116 | * {@internal Duplicate of same method as introduced in PHPCS 2.7. |
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| 117 | * Once the minimum supported PHPCS version for this sniff library goes beyond |
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| 118 | * that, this method can be removed and call to it replaced with |
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| 119 | * `$phpcsFile->findImplementedInterfaceNames($stackPtr)` calls.}} |
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| 120 | * |
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| 121 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 122 | * @param int $stackPtr The position of the class token. |
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| 123 | * |
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| 124 | * @return array|false |
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| 125 | */ |
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| 126 | public function findImplementedInterfaceNames($phpcsFile, $stackPtr) |
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| 169 | |||
| 170 | |||
| 171 | /** |
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| 172 | * Checks if a function call has parameters. |
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| 173 | * |
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| 174 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 175 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 176 | * |
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| 177 | * @link https://github.com/wimg/PHPCompatibility/issues/120 |
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| 178 | * @link https://github.com/wimg/PHPCompatibility/issues/152 |
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| 179 | * |
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| 180 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 181 | * @param int $stackPtr The position of the function call token. |
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| 182 | * |
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| 183 | * @return bool |
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| 184 | */ |
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| 185 | public function doesFunctionCallHaveParameters(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 218 | |||
| 219 | |||
| 220 | /** |
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| 221 | * Count the number of parameters a function call has been passed. |
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| 222 | * |
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| 223 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 224 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 225 | * |
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| 226 | * @link https://github.com/wimg/PHPCompatibility/issues/111 |
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| 227 | * @link https://github.com/wimg/PHPCompatibility/issues/114 |
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| 228 | * @link https://github.com/wimg/PHPCompatibility/issues/151 |
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| 229 | * |
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| 230 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 231 | * @param int $stackPtr The position of the function call token. |
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| 232 | * |
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| 233 | * @return int |
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| 234 | */ |
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| 235 | public function getFunctionCallParameterCount(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 243 | |||
| 244 | |||
| 245 | /** |
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| 246 | * Get information on all parameters passed to a function call. |
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| 247 | * |
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| 248 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 249 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 250 | * |
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| 251 | * Will return an multi-dimentional array with the start token pointer, end token |
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| 252 | * pointer and raw parameter value for all parameters. Index will be 0-based. |
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| 253 | * If no parameters are found, will return an empty array. |
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| 254 | * |
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| 255 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 256 | * @param int $stackPtr The position of the function call token. |
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| 257 | * |
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| 258 | * @return array |
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| 259 | */ |
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| 260 | public function getFunctionCallParameters(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 311 | |||
| 312 | |||
| 313 | /** |
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| 314 | * Get information on a specific parameter passed to a function call. |
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| 315 | * |
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| 316 | * Expects to be passed the T_STRING stack pointer for the function call. |
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| 317 | * If passed a T_STRING which is *not* a function call, the behaviour is unreliable. |
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| 318 | * |
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| 319 | * Will return a array with the start token pointer, end token pointer and the raw value |
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| 320 | * of the parameter at a specific position. |
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| 321 | * If the specified parameter is not found, will return false. |
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| 322 | * |
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| 323 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 324 | * @param int $stackPtr The position of the function call token. |
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| 325 | * @param int $paramPosition The 0-based index position of the parameter to retrieve. |
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| 326 | * |
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| 327 | * @return array|false |
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| 328 | */ |
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| 329 | public function getFunctionCallParameter(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $paramPosition) |
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| 340 | |||
| 341 | |||
| 342 | /** |
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| 343 | * Returns the fully qualified class name for a new class instantiation. |
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| 344 | * |
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| 345 | * Returns an empty string if the class name could not be reliably inferred. |
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| 346 | * |
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| 347 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 348 | * @param int $stackPtr The position of a T_NEW token. |
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| 349 | * |
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| 350 | * @return string |
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| 351 | */ |
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| 352 | public function getFQClassNameFromNewToken(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 379 | |||
| 380 | |||
| 381 | /** |
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| 382 | * Returns the fully qualified name of the class that the specified class extends. |
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| 383 | * |
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| 384 | * Returns an empty string if the class does not extend another class or if |
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| 385 | * the class name could not be reliably inferred. |
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| 386 | * |
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| 387 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 388 | * @param int $stackPtr The position of a T_CLASS token. |
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| 389 | * |
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| 390 | * @return string |
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| 391 | */ |
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| 392 | public function getFQExtendedClassName(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 412 | |||
| 413 | |||
| 414 | /** |
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| 415 | * Returns the class name for the static usage of a class. |
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| 416 | * This can be a call to a method, the use of a property or constant. |
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| 417 | * |
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| 418 | * Returns an empty string if the class name could not be reliably inferred. |
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| 419 | * |
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| 420 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 421 | * @param int $stackPtr The position of a T_NEW token. |
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| 422 | * |
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| 423 | * @return string |
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| 424 | */ |
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| 425 | public function getFQClassNameFromDoubleColonToken(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 466 | |||
| 467 | |||
| 468 | /** |
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| 469 | * Get the Fully Qualified name for a class/function/constant etc. |
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| 470 | * |
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| 471 | * Checks if a class/function/constant name is already fully qualified and |
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| 472 | * if not, enrich it with the relevant namespace information. |
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| 473 | * |
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| 474 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 475 | * @param int $stackPtr The position of the token. |
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| 476 | * @param string $name The class / function / constant name. |
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| 477 | * |
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| 478 | * @return string |
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| 479 | */ |
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| 480 | public function getFQName(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $name) |
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| 501 | |||
| 502 | |||
| 503 | /** |
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| 504 | * Is the class/function/constant name namespaced or global ? |
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| 505 | * |
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| 506 | * @param string $FQName Fully Qualified name of a class, function etc. |
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| 507 | * I.e. should always start with a `\` ! |
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| 508 | * |
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| 509 | * @return bool True if namespaced, false if global. |
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| 510 | */ |
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| 511 | public function isNamespaced($FQName) { |
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| 518 | |||
| 519 | |||
| 520 | /** |
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| 521 | * Determine the namespace name an arbitrary token lives in. |
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| 522 | * |
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| 523 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 524 | * @param int $stackPtr The token position for which to determine the namespace. |
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| 525 | * |
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| 526 | * @return string Namespace name or empty string if it couldn't be determined or no namespace applies. |
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| 527 | */ |
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| 528 | public function determineNamespace(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 578 | |||
| 579 | /** |
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| 580 | * Get the complete namespace name for a namespace declaration. |
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| 581 | * |
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| 582 | * For hierarchical namespaces, the name will be composed of several tokens, |
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| 583 | * i.e. MyProject\Sub\Level which will be returned together as one string. |
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| 584 | * |
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| 585 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 586 | * @param int|bool $stackPtr The position of a T_NAMESPACE token. |
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| 587 | * |
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| 588 | * @return string|false Namespace name or false if not a namespace declaration. |
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| 589 | * Namespace name can be an empty string for global namespace declaration. |
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| 590 | */ |
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| 591 | public function getDeclaredNamespaceName(PHP_CodeSniffer_File $phpcsFile, $stackPtr ) |
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| 631 | |||
| 632 | }//end class |
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| 633 |
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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.