<?php
/**
* Checks that duplicate arguments are not used in function declarations.
*
* @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\Squiz\Sniffs\Functions;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
class FunctionDuplicateArgumentSniff implements Sniff
{
/**
* Returns an array of tokens this test wants to listen for.
*
* @return array
*/
public function register()
{
return [T_FUNCTION];
}//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();
$openBracket = $tokens[$stackPtr]['parenthesis_opener'];
$closeBracket = $tokens[$stackPtr]['parenthesis_closer'];
$foundVariables = [];
for ($i = ($openBracket + 1); $i < $closeBracket; $i++) {
if ($tokens[$i]['code'] === T_VARIABLE) {
$variable = $tokens[$i]['content'];
if (in_array($variable, $foundVariables, true) === true) {
$error = 'Variable "%s" appears more than once in function declaration';
$data = [$variable];
$phpcsFile->addError($error, $i, 'Found', $data);
} else {
$foundVariables[] = $variable;
}
}
}
}//end process()
}//end class