61 lines
2.1 KiB
PHP
61 lines
2.1 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) 2012-2014 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\FuncCall;
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use PhpParser\Node\Expr\Variable;
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use PhpParser\Node\Stmt\Function_ as FunctionStmt;
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use Psy\Exception\FatalErrorException;
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/**
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* Validate that function calls will succeed.
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*
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* This pass throws a FatalErrorException rather than letting PHP run
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* headfirst into a real fatal error and die.
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*/
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class ValidFunctionNamePass extends NamespaceAwarePass
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{
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/**
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* Validate that function calls will succeed.
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*
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* @throws FatalErrorException if a function is redefined.
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* @throws FatalErrorException if the function name is a string (not an expression) and is not defined.
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*
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* @param Node $node
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*/
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public function leaveNode(Node $node)
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{
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if ($node instanceof FunctionStmt) {
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$name = $this->getFullyQualifiedName($node->name);
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if (function_exists($name) || isset($this->currentScope[strtolower($name)])) {
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throw new FatalErrorException(sprintf('Cannot redeclare %s()', $name), 0, 1, null, $node->getLine());
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}
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$this->currentScope[strtolower($name)] = true;
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} elseif ($node instanceof FuncCall) {
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// if function name is an expression or a variable, give it a pass for now.
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$name = $node->name;
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if (!$name instanceof Expression && !$name instanceof Variable) {
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$shortName = implode('\\', $name->parts);
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$fullName = $this->getFullyQualifiedName($name);
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$inScope = isset($this->currentScope[strtolower($fullName)]);
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if (!$inScope && !function_exists($shortName) && !function_exists($fullName)) {
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$message = sprintf('Call to undefined function %s()', $name);
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throw new FatalErrorException($message, 0, 1, null, $node->getLine());
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}
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}
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}
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}
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}
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