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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\Debug\FatalErrorHandler;
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13
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14 use Symfony\Component\Debug\Exception\FatalErrorException;
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15 use Symfony\Component\Debug\Exception\UndefinedFunctionException;
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16
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17 /**
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18 * ErrorHandler for undefined functions.
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19 *
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20 * @author Fabien Potencier <fabien@symfony.com>
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21 */
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22 class UndefinedFunctionFatalErrorHandler implements FatalErrorHandlerInterface
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23 {
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24 /**
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25 * {@inheritdoc}
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26 */
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27 public function handleError(array $error, FatalErrorException $exception)
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28 {
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29 $messageLen = \strlen($error['message']);
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30 $notFoundSuffix = '()';
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31 $notFoundSuffixLen = \strlen($notFoundSuffix);
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32 if ($notFoundSuffixLen > $messageLen) {
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33 return;
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34 }
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35
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36 if (0 !== substr_compare($error['message'], $notFoundSuffix, -$notFoundSuffixLen)) {
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37 return;
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38 }
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39
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40 $prefix = 'Call to undefined function ';
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41 $prefixLen = \strlen($prefix);
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42 if (0 !== strpos($error['message'], $prefix)) {
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43 return;
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44 }
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45
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46 $fullyQualifiedFunctionName = substr($error['message'], $prefixLen, -$notFoundSuffixLen);
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47 if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedFunctionName, '\\')) {
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48 $functionName = substr($fullyQualifiedFunctionName, $namespaceSeparatorIndex + 1);
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49 $namespacePrefix = substr($fullyQualifiedFunctionName, 0, $namespaceSeparatorIndex);
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50 $message = sprintf('Attempted to call function "%s" from namespace "%s".', $functionName, $namespacePrefix);
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51 } else {
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52 $functionName = $fullyQualifiedFunctionName;
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53 $message = sprintf('Attempted to call function "%s" from the global namespace.', $functionName);
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54 }
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55
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56 $candidates = [];
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57 foreach (get_defined_functions() as $type => $definedFunctionNames) {
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58 foreach ($definedFunctionNames as $definedFunctionName) {
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59 if (false !== $namespaceSeparatorIndex = strrpos($definedFunctionName, '\\')) {
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60 $definedFunctionNameBasename = substr($definedFunctionName, $namespaceSeparatorIndex + 1);
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61 } else {
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62 $definedFunctionNameBasename = $definedFunctionName;
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63 }
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64
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65 if ($definedFunctionNameBasename === $functionName) {
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66 $candidates[] = '\\'.$definedFunctionName;
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67 }
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68 }
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69 }
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70
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71 if ($candidates) {
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72 sort($candidates);
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73 $last = array_pop($candidates).'"?';
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74 if ($candidates) {
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75 $candidates = 'e.g. "'.implode('", "', $candidates).'" or "'.$last;
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76 } else {
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77 $candidates = '"'.$last;
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78 }
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79 $message .= "\nDid you mean to call ".$candidates;
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80 }
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81
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82 return new UndefinedFunctionException($message, $exception);
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83 }
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84 }
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