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- 06.01.2017
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UndefinedFunctionFatalErrorHandler.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Component\Debug\FatalErrorHandler;
13
14 use Symfony\Component\Debug\Exception\UndefinedFunctionException;
15 use Symfony\Component\Debug\Exception\FatalErrorException;
16
17 /**
18 * ErrorHandler for undefined functions.
19 *
20 * @author Fabien Potencier <fabien@symfony.com>
21 */
22 class UndefinedFunctionFatalErrorHandler implements FatalErrorHandlerInterface
23 {
24 /**
25 * {@inheritdoc}
26 */
27 public function handleError(array $error, FatalErrorException $exception)
28 {
29 $messageLen = strlen($error['message']);
30 $notFoundSuffix = '()';
31 $notFoundSuffixLen = strlen($notFoundSuffix);
32 if ($notFoundSuffixLen > $messageLen) {
33 return;
34 }
35
36 if (0 !== substr_compare($error['message'], $notFoundSuffix, -$notFoundSuffixLen)) {
37 return;
38 }
39
40 $prefix = 'Call to undefined function ';
41 $prefixLen = strlen($prefix);
42 if (0 !== strpos($error['message'], $prefix)) {
43 return;
44 }
45
46 $fullyQualifiedFunctionName = substr($error['message'], $prefixLen, -$notFoundSuffixLen);
47 if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedFunctionName, '\\')) {
48 $functionName = substr($fullyQualifiedFunctionName, $namespaceSeparatorIndex + 1);
49 $namespacePrefix = substr($fullyQualifiedFunctionName, 0, $namespaceSeparatorIndex);
50 $message = sprintf('Attempted to call function "%s" from namespace "%s".', $functionName, $namespacePrefix);
51 } else {
52 $functionName = $fullyQualifiedFunctionName;
53 $message = sprintf('Attempted to call function "%s" from the global namespace.', $functionName);
54 }
55
56 $candidates = array();
57 foreach (get_defined_functions() as $type => $definedFunctionNames) {
58 foreach ($definedFunctionNames as $definedFunctionName) {
59 if (false !== $namespaceSeparatorIndex = strrpos($definedFunctionName, '\\')) {
60 $definedFunctionNameBasename = substr($definedFunctionName, $namespaceSeparatorIndex + 1);
61 } else {
62 $definedFunctionNameBasename = $definedFunctionName;
63 }
64
65 if ($definedFunctionNameBasename === $functionName) {
66 $candidates[] = '\\'.$definedFunctionName;
67 }
68 }
69 }
70
71 if ($candidates) {
72 sort($candidates);
73 $last = array_pop($candidates).'"?';
74 if ($candidates) {
75 $candidates = 'e.g. "'.implode('", "', $candidates).'" or "'.$last;
76 } else {
77 $candidates = '"'.$last;
78 }
79 $message .= "\nDid you mean to call ".$candidates;
80 }
81
82 return new UndefinedFunctionException($message, $exception);
83 }
84 }
85