92 lines
2.6 KiB
PHP
92 lines
2.6 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\LanguageConstructs;
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use PHPCompatibility\Sniff;
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use PHP_CodeSniffer_File as File;
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use PHP_CodeSniffer_Tokens as Tokens;
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/**
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* Verify that nothing but variables are passed to empty().
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*
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* Prior to PHP 5.5, `empty()` only supported variables; anything else resulted in a parse error.
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*
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* PHP version 5.5
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*
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* @link https://wiki.php.net/rfc/empty_isset_exprs
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* @link https://www.php.net/manual/en/function.empty.php
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*
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* @since 7.0.4
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* @since 9.0.0 The "is the parameter a variable" determination has been abstracted out
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* and moved to a separate method `Sniff::isVariable()`.
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* @since 9.0.0 Renamed from `EmptyNonVariableSniff` to `NewEmptyNonVariableSniff`.
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*/
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class NewEmptyNonVariableSniff 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 7.0.4
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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_EMPTY);
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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 7.0.4
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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 = $phpcsFile->getTokens();
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$open = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), null, true, null, true);
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if ($open === false
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|| $tokens[$open]['code'] !== \T_OPEN_PARENTHESIS
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|| isset($tokens[$open]['parenthesis_closer']) === false
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) {
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return;
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}
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$close = $tokens[$open]['parenthesis_closer'];
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$nestingLevel = 0;
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if ($close !== ($open + 1) && isset($tokens[$open + 1]['nested_parenthesis'])) {
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$nestingLevel = \count($tokens[$open + 1]['nested_parenthesis']);
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}
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if ($this->isVariable($phpcsFile, ($open + 1), $close, $nestingLevel) === true) {
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return;
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}
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$phpcsFile->addError(
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'Only variables can be passed to empty() prior to PHP 5.5.',
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$stackPtr,
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'Found'
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);
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}
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}
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