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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| 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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| 277 | |||
| 278 | |||
| 279 | /** |
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| 280 | * Verify whether a token is within a class scope. |
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| 281 | * |
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| 282 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 283 | * @param int $stackPtr The position of the token. |
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| 284 | * @param bool $strict Whether to strictly check for the T_CLASS |
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| 285 | * scope or also accept interfaces and traits |
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| 286 | * as scope. |
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| 287 | * |
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| 288 | * @return bool True if within class scope, false otherwise. |
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| 289 | */ |
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| 290 | public function inClassScope(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $strict = true) |
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| 319 | |||
| 320 | |||
| 321 | /** |
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| 322 | * Returns the fully qualified class name for a new class instantiation. |
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| 323 | * |
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| 324 | * Returns an empty string if the class name could not be reliably inferred. |
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| 325 | * |
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| 326 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 327 | * @param int $stackPtr The position of a T_NEW token. |
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| 328 | * |
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| 329 | * @return string |
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| 330 | */ |
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| 331 | public function getFQClassNameFromNewToken(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 358 | |||
| 359 | |||
| 360 | /** |
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| 361 | * Returns the fully qualified name of the class that the specified class extends. |
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| 362 | * |
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| 363 | * Returns an empty string if the class does not extend another class or if |
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| 364 | * the class name could not be reliably inferred. |
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| 365 | * |
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| 366 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 367 | * @param int $stackPtr The position of a T_CLASS token. |
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| 368 | * |
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| 369 | * @return string |
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| 370 | */ |
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| 371 | public function getFQExtendedClassName(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 391 | |||
| 392 | |||
| 393 | /** |
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| 394 | * Returns the class name for the static usage of a class. |
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| 395 | * This can be a call to a method, the use of a property or constant. |
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| 396 | * |
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| 397 | * Returns an empty string if the class name could not be reliably inferred. |
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| 398 | * |
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| 399 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 400 | * @param int $stackPtr The position of a T_NEW token. |
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| 401 | * |
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| 402 | * @return string |
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| 403 | */ |
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| 404 | public function getFQClassNameFromDoubleColonToken(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 445 | |||
| 446 | |||
| 447 | /** |
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| 448 | * Get the Fully Qualified name for a class/function/constant etc. |
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| 449 | * |
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| 450 | * Checks if a class/function/constant name is already fully qualified and |
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| 451 | * if not, enrich it with the relevant namespace information. |
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| 452 | * |
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| 453 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 454 | * @param int $stackPtr The position of the token. |
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| 455 | * @param string $name The class / function / constant name. |
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| 456 | * |
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| 457 | * @return string |
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| 458 | */ |
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| 459 | public function getFQName(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $name) |
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| 480 | |||
| 481 | |||
| 482 | /** |
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| 483 | * Is the class/function/constant name namespaced or global ? |
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| 484 | * |
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| 485 | * @param string $FQName Fully Qualified name of a class, function etc. |
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| 486 | * I.e. should always start with a `\` ! |
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| 487 | * |
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| 488 | * @return bool True if namespaced, false if global. |
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| 489 | */ |
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| 490 | public function isNamespaced($FQName) { |
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| 497 | |||
| 498 | |||
| 499 | /** |
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| 500 | * Determine the namespace name an arbitrary token lives in. |
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| 501 | * |
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| 502 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 503 | * @param int $stackPtr The token position for which to determine the namespace. |
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| 504 | * |
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| 505 | * @return string Namespace name or empty string if it couldn't be determined or no namespace applies. |
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| 506 | */ |
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| 507 | public function determineNamespace(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 557 | |||
| 558 | /** |
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| 559 | * Get the complete namespace name for a namespace declaration. |
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| 560 | * |
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| 561 | * For hierarchical namespaces, the name will be composed of several tokens, |
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| 562 | * i.e. MyProject\Sub\Level which will be returned together as one string. |
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| 563 | * |
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| 564 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 565 | * @param int|bool $stackPtr The position of a T_NAMESPACE token. |
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| 566 | * |
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| 567 | * @return string|false Namespace name or false if not a namespace declaration. |
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| 568 | * Namespace name can be an empty string for global namespace declaration. |
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| 569 | */ |
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| 570 | public function getDeclaredNamespaceName(PHP_CodeSniffer_File $phpcsFile, $stackPtr ) |
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| 610 | |||
| 611 | |||
| 612 | /** |
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| 613 | * Returns the method parameters for the specified T_FUNCTION token. |
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| 614 | * |
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| 615 | * Each parameter is in the following format: |
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| 616 | * |
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| 617 | * <code> |
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| 618 | * 0 => array( |
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| 619 | * 'name' => '$var', // The variable name. |
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| 620 | * 'pass_by_reference' => false, // Passed by reference. |
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| 621 | * 'type_hint' => string, // Type hint for array or custom type |
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| 622 | * ) |
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| 623 | * </code> |
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| 624 | * |
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| 625 | * Parameters with default values have an additional array index of |
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| 626 | * 'default' with the value of the default as a string. |
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| 627 | * |
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| 628 | * {@internal Duplicate of same method as contained in the `PHP_CodeSniffer_File` |
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| 629 | * class, but with some improvements which were only introduced in PHPCS 2.7. |
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| 630 | * Once the minimum supported PHPCS version for this sniff library goes beyond |
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| 631 | * that, this method can be removed and calls to it replaced with |
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| 632 | * `$phpcsFile->getMethodParameters($stackPtr)` calls.}} |
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| 633 | * |
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| 634 | * @param PHP_CodeSniffer_File $phpcsFile Instance of phpcsFile. |
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| 635 | * @param int $stackPtr The position in the stack of the T_FUNCTION token |
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| 636 | * to acquire the parameters for. |
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| 637 | * |
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| 638 | * @return array |
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| 639 | * @throws PHP_CodeSniffer_Exception If the specified $stackPtr is not of |
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| 640 | * type T_FUNCTION. |
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| 641 | */ |
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| 642 | public function getMethodParameters(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 787 | |||
| 788 | }//end class |
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| 789 |
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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.