<?php
/**
* Detects for-loops that use a function call in the test expression.
*
* This rule is based on the PMD rule catalogue. Detects for-loops that use a
* function call in the test expression.
*
* <code>
* class Foo
* {
* public function bar($x)
* {
* $a = array(1, 2, 3, 4);
* for ($i = 0; $i < count($a); $i++) {
* $a[$i] *= $i;
* }
* }
* }
* </code>
*
* @author Greg Sherwood <gsherwood@squiz.net>
* @author Manuel Pichler <mapi@manuel-pichler.de>
* @copyright 2007-2014 Manuel Pichler. All rights reserved.
* @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
*/
namespace PHP_CodeSniffer\Standards\Generic\Sniffs\CodeAnalysis;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Util\Tokens;
class ForLoopWithTestFunctionCallSniff implements Sniff
{
/**
* Registers the tokens that this sniff wants to listen for.
*
* @return int[]
*/
public function register()
{
return [T_FOR];
}//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();
$token = $tokens[$stackPtr];
// Skip invalid statement.
if (isset($token['parenthesis_opener']) === false) {
return;
}
$next = ++$token['parenthesis_opener'];
$end = --$token['parenthesis_closer'];
$position = 0;
for (; $next <= $end; ++$next) {
$code = $tokens[$next]['code'];
if ($code === T_SEMICOLON) {
++$position;
}
if ($position < 1) {
continue;
} else if ($position > 1) {
break;
} else if ($code !== T_VARIABLE && $code !== T_STRING) {
continue;
}
// Find next non empty token, if it is a open curly brace we have a
// function call.
$index = $phpcsFile->findNext(Tokens::$emptyTokens, ($next + 1), null, true);
if ($tokens[$index]['code'] === T_OPEN_PARENTHESIS) {
$error = 'Avoid function calls in a FOR loop test part';
$phpcsFile->addWarning($error, $stackPtr, 'NotAllowed');
break;
}
}//end for
}//end process()
}//end class