100 lines
2.9 KiB
PHP
100 lines
2.9 KiB
PHP
<?php
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/**
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* PHPCompatibility, an external standard for PHP_CodeSniffer.
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*
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* @package PHPCompatibility
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* @copyright 2012-2019 PHPCompatibility Contributors
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* @license https://opensource.org/licenses/LGPL-3.0 LGPL3
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* @link https://github.com/PHPCompatibility/PHPCompatibility
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*/
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namespace PHPCompatibility\Sniffs\ControlStructures;
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use PHPCompatibility\Sniff;
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use PHP_CodeSniffer_File as File;
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/**
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* Detect `foreach` expression referencing.
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*
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* Before PHP 5.5.0, referencing `$value` in a `foreach` was only possible
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* if the iterated array could be referenced (i.e. if it is a variable).
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*
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* PHP version 5.5
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*
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* @link https://www.php.net/manual/en/control-structures.foreach.php
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*
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* @since 9.0.0
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*/
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class NewForeachExpressionReferencingSniff extends Sniff
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{
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/**
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* Returns an array of tokens this test wants to listen for.
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*
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* @since 9.0.0
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*
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* @return array
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*/
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public function register()
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{
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return array(\T_FOREACH);
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}
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/**
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* Processes this test, when one of its tokens is encountered.
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*
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* @since 9.0.0
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*
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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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*
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* @return void
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*/
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public function process(File $phpcsFile, $stackPtr)
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{
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if ($this->supportsBelow('5.4') === false) {
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return;
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}
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$tokens = $phpcsFile->getTokens();
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if (isset($tokens[$stackPtr]['parenthesis_opener'], $tokens[$stackPtr]['parenthesis_closer']) === false) {
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return;
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}
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$opener = $tokens[$stackPtr]['parenthesis_opener'];
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$closer = $tokens[$stackPtr]['parenthesis_closer'];
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$asToken = $phpcsFile->findNext(\T_AS, ($opener + 1), $closer);
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if ($asToken === false) {
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return;
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}
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/*
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* Note: referencing $key is not allowed in any version, so this should only find referenced $values.
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* If it does find a referenced key, it would be a parse error anyway.
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*/
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$hasReference = $phpcsFile->findNext(\T_BITWISE_AND, ($asToken + 1), $closer);
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if ($hasReference === false) {
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return;
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}
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$nestingLevel = 0;
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if ($asToken !== ($opener + 1) && isset($tokens[$opener + 1]['nested_parenthesis'])) {
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$nestingLevel = \count($tokens[$opener + 1]['nested_parenthesis']);
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}
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if ($this->isVariable($phpcsFile, ($opener + 1), $asToken, $nestingLevel) === true) {
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return;
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}
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// Non-variable detected before the `as` keyword.
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$phpcsFile->addError(
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'Referencing $value is only possible if the iterated array is a variable in PHP 5.4 or earlier.',
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$hasReference,
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'Found'
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);
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}
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}
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