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<?php
/**
* Squiz_Sniffs_Scope_StaticThisUsageSniff.
*
* PHP version 5
*
* @category PHP
* @package PHP_CodeSniffer
* @author Greg Sherwood <gsherwood@squiz.net>
* @author Marc McIntyre <mmcintyre@squiz.net>
* @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
if (class_exists('PHP_CodeSniffer_Standards_AbstractScopeSniff', true) === false) {
throw new PHP_CodeSniffer_Exception('Class PHP_CodeSniffer_Standards_AbstractScopeSniff not found');
}
/**
* Squiz_Sniffs_Scope_StaticThisUsageSniff.
*
* Checks for usage of "$this" in static methods, which will cause
* runtime errors.
*
* @category PHP
* @package PHP_CodeSniffer
* @author Greg Sherwood <gsherwood@squiz.net>
* @author Marc McIntyre <mmcintyre@squiz.net>
* @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
* @version Release: 1.3.3
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
class Squiz_Sniffs_Scope_StaticThisUsageSniff extends PHP_CodeSniffer_Standards_AbstractScopeSniff
{
/**
* Constructs the test with the tokens it wishes to listen for.
*
* @return void
*/
public function __construct()
{
parent::__construct(array(T_CLASS), array(T_FUNCTION));
}//end __construct()
/**
* Processes this test, when one of its tokens is encountered.
*
* @param PHP_CodeSniffer_File $phpcsFile The current file being scanned.
* @param int $stackPtr The position of the current token in the
* stack passed in $tokens.
* @param int $currScope A pointer to the start of the scope.
*
* @return void
*/
public function processTokenWithinScope(PHP_CodeSniffer_File $phpcsFile, $stackPtr, $currScope)
{
$tokens = $phpcsFile->getTokens();
$function = $tokens[($stackPtr + 2)];
if ($function['code'] !== T_STRING) {
return;
}
$functionName = $function['content'];
$classOpener = $tokens[$currScope]['scope_condition'];
$className = $tokens[($classOpener + 2)]['content'];
$methodProps = $phpcsFile->getMethodProperties($stackPtr);
if ($methodProps['is_static'] === true) {
if (isset($tokens[$stackPtr]['scope_closer']) === false) {
// There is no scope opener or closer, so the function
// must be abstract.
return;
}
$thisUsage = $stackPtr;
while (($thisUsage = $phpcsFile->findNext(array(T_VARIABLE), ($thisUsage + 1), $tokens[$stackPtr]['scope_closer'], false, '$this')) !== false) {
if ($thisUsage === false) {
return;
}
$error = 'Usage of "$this" in static methods will cause runtime errors';
$phpcsFile->addError($error, $thisUsage, 'Found');
}
}//end if
}//end processTokenWithinScope()
}//end class
?>
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