41 lines
1014 B
PHP
Executable File
41 lines
1014 B
PHP
Executable File
<?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\Variable;
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use Psy\Exception\RuntimeException;
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/**
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* Validate that the user input does not reference the `$__psysh__` variable.
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*/
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class LeavePsyshAlonePass extends CodeCleanerPass
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{
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/**
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* Validate that the user input does not reference the `$__psysh__` variable.
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*
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* @throws RuntimeException if the user is messing with $__psysh__
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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 Variable && $node->name === '__psysh__') {
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throw new RuntimeException('Don\'t mess with $__psysh__; bad things will happen');
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}
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return null;
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}
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}
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