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AssignThisSniff.php
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<?php /** * Ensures this is not assigned to any other var but self. * * @author Greg Sherwood <gsherwood@squiz.net> * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600) * @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence */ namespace PHP_CodeSniffer\Standards\MySource\Sniffs\Objects; use PHP_CodeSniffer\Sniffs\Sniff; use PHP_CodeSniffer\Files\File; class AssignThisSniff implements Sniff { /** * A list of tokenizers this sniff supports. * * @var array */ public $supportedTokenizers = ['JS']; /** * Returns an array of tokens this test wants to listen for. * * @return array */ public function register() { return [T_THIS]; }//end register() /** * Processes this test, when one of its tokens is encountered. * * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned. * @param int $stackPtr The position of the current token * in the stack passed in $tokens. * * @return void */ public function process(File $phpcsFile, $stackPtr) { $tokens = $phpcsFile->getTokens(); // Ignore this.something and other uses of "this" that are not // direct assignments. $next = $phpcsFile->findNext(T_WHITESPACE, ($stackPtr + 1), null, true); if ($tokens[$next]['code'] !== T_SEMICOLON) { if ($tokens[$next]['line'] === $tokens[$stackPtr]['line']) { return; } } // Something must be assigned to "this". $prev = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), null, true); if ($tokens[$prev]['code'] !== T_EQUAL) { return; } // A variable needs to be assigned to "this". $prev = $phpcsFile->findPrevious(T_WHITESPACE, ($prev - 1), null, true); if ($tokens[$prev]['code'] !== T_STRING) { return; } // We can only assign "this" to a var called "self". if ($tokens[$prev]['content'] !== 'self' && $tokens[$prev]['content'] !== '_self') { $error = 'Keyword "this" can only be assigned to a variable called "self" or "_self"'; $phpcsFile->addError($error, $prev, 'NotSelf'); } }//end process() }//end class