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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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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 Symfony\Component\ErrorHandler\ErrorEnhancer;
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use Symfony\Component\ErrorHandler\Error\FatalError;
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use Symfony\Component\ErrorHandler\Error\UndefinedFunctionError;
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/**
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class UndefinedFunctionErrorEnhancer implements ErrorEnhancerInterface
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{
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public function enhance(\Throwable $error): ?\Throwable
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{
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if ($error instanceof FatalError) {
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return null;
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}
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$message = $error->getMessage();
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$messageLen = \strlen($message);
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$notFoundSuffix = '()';
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$notFoundSuffixLen = \strlen($notFoundSuffix);
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if ($notFoundSuffixLen > $messageLen) {
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return null;
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}
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if (0 !== substr_compare($message, $notFoundSuffix, -$notFoundSuffixLen)) {
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return null;
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}
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$prefix = 'Call to undefined function ';
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$prefixLen = \strlen($prefix);
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if (!str_starts_with($message, $prefix)) {
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return null;
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}
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$fullyQualifiedFunctionName = substr($message, $prefixLen, -$notFoundSuffixLen);
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if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedFunctionName, '\\')) {
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$functionName = substr($fullyQualifiedFunctionName, $namespaceSeparatorIndex + 1);
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$namespacePrefix = substr($fullyQualifiedFunctionName, 0, $namespaceSeparatorIndex);
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$message = sprintf('Attempted to call function "%s" from namespace "%s".', $functionName, $namespacePrefix);
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} else {
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$functionName = $fullyQualifiedFunctionName;
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$message = sprintf('Attempted to call function "%s" from the global namespace.', $functionName);
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}
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$candidates = [];
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foreach (get_defined_functions() as $type => $definedFunctionNames) {
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foreach ($definedFunctionNames as $definedFunctionName) {
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if (false !== $namespaceSeparatorIndex = strrpos($definedFunctionName, '\\')) {
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$definedFunctionNameBasename = substr($definedFunctionName, $namespaceSeparatorIndex + 1);
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} else {
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$definedFunctionNameBasename = $definedFunctionName;
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}
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if ($definedFunctionNameBasename === $functionName) {
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$candidates[] = '\\'.$definedFunctionName;
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}
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}
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}
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if ($candidates) {
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sort($candidates);
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$last = array_pop($candidates).'"?';
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if ($candidates) {
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$candidates = 'e.g. "'.implode('", "', $candidates).'" or "'.$last;
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} else {
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$candidates = '"'.$last;
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}
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$message .= "\nDid you mean to call ".$candidates;
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}
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return new UndefinedFunctionError($message, $error);
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}
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}
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