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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Debug\FatalErrorHandler;
use Symfony\Component\Debug\Exception\FatalErrorException;
use Symfony\Component\Debug\Exception\UndefinedFunctionException;
/**
* ErrorHandler for undefined functions.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class UndefinedFunctionFatalErrorHandler implements FatalErrorHandlerInterface
{
/**
* {@inheritdoc}
*/
public function handleError(array $error, FatalErrorException $exception)
{
$messageLen = \strlen($error['message']);
$notFoundSuffix = '()';
$notFoundSuffixLen = \strlen($notFoundSuffix);
if ($notFoundSuffixLen > $messageLen) {
return;
}
if (0 !== substr_compare($error['message'], $notFoundSuffix, -$notFoundSuffixLen)) {
return;
}
$prefix = 'Call to undefined function ';
$prefixLen = \strlen($prefix);
if (0 !== strpos($error['message'], $prefix)) {
return;
}
$fullyQualifiedFunctionName = substr($error['message'], $prefixLen, -$notFoundSuffixLen);
if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedFunctionName, '\\')) {
$functionName = substr($fullyQualifiedFunctionName, $namespaceSeparatorIndex + 1);
$namespacePrefix = substr($fullyQualifiedFunctionName, 0, $namespaceSeparatorIndex);
$message = sprintf('Attempted to call function "%s" from namespace "%s".', $functionName, $namespacePrefix);
} else {
$functionName = $fullyQualifiedFunctionName;
$message = sprintf('Attempted to call function "%s" from the global namespace.', $functionName);
}
$candidates = [];
foreach (get_defined_functions() as $type => $definedFunctionNames) {
foreach ($definedFunctionNames as $definedFunctionName) {
if (false !== $namespaceSeparatorIndex = strrpos($definedFunctionName, '\\')) {
$definedFunctionNameBasename = substr($definedFunctionName, $namespaceSeparatorIndex + 1);
} else {
$definedFunctionNameBasename = $definedFunctionName;
}
if ($definedFunctionNameBasename === $functionName) {
$candidates[] = '\\'.$definedFunctionName;
}
}
}
if ($candidates) {
sort($candidates);
$last = array_pop($candidates).'"?';
if ($candidates) {
$candidates = 'e.g. "'.implode('", "', $candidates).'" or "'.$last;
} else {
$candidates = '"'.$last;
}
$message .= "\nDid you mean to call ".$candidates;
}
return new UndefinedFunctionException($message, $exception);
}
}
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