44 lines
1.1 KiB
PHP
44 lines
1.1 KiB
PHP
<?php
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/*
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* This file is part of Psy Shell.
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*
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* (c) 2012-2026 Justin Hileman
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Psy\CodeCleaner;
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use PhpParser\Node;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\Variable;
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use Psy\Exception\FatalErrorException;
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/**
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* Validate that the user input does not assign the `$this` variable.
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*
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* @author Martin Hasoň <martin.hason@gmail.com>
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*/
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class AssignThisVariablePass extends CodeCleanerPass
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{
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/**
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* Validate that the user input does not assign the `$this` variable.
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*
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* @throws FatalErrorException if the user assign the `$this` variable
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*
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* @param Node $node
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*
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* @return int|Node|null Replacement node (or special return value)
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*/
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public function enterNode(Node $node)
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{
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if ($node instanceof Assign && $node->var instanceof Variable && $node->var->name === 'this') {
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throw new FatalErrorException('Cannot re-assign $this', 0, \E_ERROR, null, $node->getStartLine());
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}
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return null;
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}
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}
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