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JoinStringsSniff.php
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<?php /** * Ensures that strings are not joined using array.join(). * * @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\Strings; use PHP_CodeSniffer\Sniffs\Sniff; use PHP_CodeSniffer\Files\File; use PHP_CodeSniffer\Util\Tokens; class JoinStringsSniff 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_STRING]; }//end register() /** * Processes this test, when one of its tokens is encountered. * * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned. * @param integer $stackPtr The position of the current token * in the stack passed in $tokens. * * @return void */ public function process(File $phpcsFile, $stackPtr) { $tokens = $phpcsFile->getTokens(); if ($tokens[$stackPtr]['content'] !== 'join') { return; } $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true); if ($tokens[$prev]['code'] !== T_OBJECT_OPERATOR) { return; } $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($prev - 1), null, true); if ($tokens[$prev]['code'] === T_CLOSE_SQUARE_BRACKET) { $opener = $tokens[$prev]['bracket_opener']; if ($tokens[($opener - 1)]['code'] !== T_STRING) { // This means the array is declared inline, like x = [a,b,c].join() // and not elsewhere, like x = y[a].join() // The first is not allowed while the second is. $error = 'Joining strings using inline arrays is not allowed; use the + operator instead'; $phpcsFile->addError($error, $stackPtr, 'ArrayNotAllowed'); } } }//end process() }//end class