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* Generic_Sniffs_PHP_LowerCaseConstantSniff.
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* @package PHP_CodeSniffer
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* @author Greg Sherwood <gsherwood@squiz.net>
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* @author Marc McIntyre <mmcintyre@squiz.net>
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* @copyright 2006 Squiz Pty Ltd (ABN 77 084 670 600)
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* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
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* @version CVS: $Id: LowerCaseConstantSniff.php,v 1.7 2007/07/23 01:47:52 squiz Exp $
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* @link http://pear.php.net/package/PHP_CodeSniffer
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* Generic_Sniffs_PHP_LowerCaseConstantSniff.
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* Checks that all uses of true, false and null are lowerrcase.
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* @package PHP_CodeSniffer
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* @author Greg Sherwood <gsherwood@squiz.net>
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* @author Marc McIntyre <mmcintyre@squiz.net>
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* @copyright 2006 Squiz Pty Ltd (ABN 77 084 670 600)
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* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
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* @version Release: 1.0.1
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* @link http://pear.php.net/package/PHP_CodeSniffer
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class Generic_Sniffs_PHP_LowerCaseConstantSniff implements PHP_CodeSniffer_Sniff
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* Returns an array of tokens this test wants to listen for.
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public function register()
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* Processes this sniff, when one of its tokens is encountered.
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* @param PHP_CodeSniffer_File $phpcsFile The file being scanned.
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* @param int $stackPtr The position of the current token in the
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* stack passed in $tokens.
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public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
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$tokens = $phpcsFile->getTokens();
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$keyword = $tokens[$stackPtr]['content'];
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if (strtolower($keyword) !== $keyword) {
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$error = 'PHP keywords must be lowercase; expected "'.strtolower($keyword).'" but found "'.$keyword.'"';
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$phpcsFile->addError($error, $stackPtr);