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<?php
/**
* Generic_Sniffs_PHP_ForbiddenFunctionsSniff.
*
* 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
*/
/**
* Generic_Sniffs_PHP_ForbiddenFunctionsSniff.
*
* Discourages the use of alias functions that are kept in PHP for compatibility
* with older versions. Can be used to forbid the use of any function.
*
* @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: 1.3.4
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
class Generic_Sniffs_PHP_ForbiddenFunctionsSniff implements PHP_CodeSniffer_Sniff
{
/**
* A list of forbidden functions with their alternatives.
*
* The value is NULL if no alternative exists. IE, the
* function should just not be used.
*
* @var array(string => string|null)
*/
protected $forbiddenFunctions = array(
'sizeof' => 'count',
'delete' => 'unset',
);
/**
* A cache of forbidden function names, for faster lookups.
*
* @var array(string)
*/
protected $forbiddenFunctionNames = array();
/**
* If true, forbidden functions will be considered regular expressions.
*
* @var bool
*/
protected $patternMatch = false;
/**
* If true, an error will be thrown; otherwise a warning.
*
* @var bool
*/
public $error = true;
/**
* Returns an array of tokens this test wants to listen for.
*
* @return array
*/
public function register()
{
// Everyone has had a chance to figure out what forbidden functions
// they want to check for, so now we can cache out the list.
$this->forbiddenFunctionNames = array_keys($this->forbiddenFunctions);
if ($this->patternMatch === true) {
foreach ($this->forbiddenFunctionNames as $i => $name) {
$this->forbiddenFunctionNames[$i] = '/'.$name.'/i';
}
}
return array(T_STRING);
}//end register()
/**
* Processes this test, when one of its tokens is encountered.
*
* @param PHP_CodeSniffer_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(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
{
$tokens = $phpcsFile->getTokens();
$ignore = array(
T_DOUBLE_COLON,
T_OBJECT_OPERATOR,
T_FUNCTION,
T_CONST,
);
$prevToken = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), null, true);
if (in_array($tokens[$prevToken]['code'], $ignore) === true) {
// Not a call to a PHP function.
return;
}
$function = strtolower($tokens[$stackPtr]['content']);
$pattern = null;
if ($this->patternMatch === true) {
$count = 0;
$pattern = preg_replace(
$this->forbiddenFunctionNames,
$this->forbiddenFunctionNames,
$function,
1,
$count
);
if ($count === 0) {
return;
}
// Remove the pattern delimiters and modifier.
$pattern = substr($pattern, 1, -2);
} else {
if (in_array($function, $this->forbiddenFunctionNames) === false) {
return;
}
}
$this->addError($phpcsFile, $stackPtr, $function, $pattern);
}//end process()
/**
* Generates the error or wanrning for this sniff.
*
* @param PHP_CodeSniffer_File $phpcsFile The file being scanned.
* @param int $stackPtr The position of the forbidden function
* in the token array.
* @param string $function The name of the forbidden function.
* @param string $pattern The pattern used for the match.
*
* @return void
*/
protected function addError($phpcsFile, $stackPtr, $function, $pattern=null)
{
$data = array($function);
$error = 'The use of function %s() is ';
if ($this->error === true) {
$type = 'Found';
$error .= 'forbidden';
} else {
$type = 'Discouraged';
$error .= 'discouraged';
}
if ($pattern === null) {
$pattern = $function;
}
if ($this->forbiddenFunctions[$pattern] !== null) {
$type .= 'WithAlternative';
$data[] = $this->forbiddenFunctions[$pattern];
$error .= '; use %s() instead';
}
if ($this->error === true) {
$phpcsFile->addError($error, $stackPtr, $type, $data);
} else {
$phpcsFile->addWarning($error, $stackPtr, $type, $data);
}
}//end addError()
}//end class
?>
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