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1441 ariadna 1 
<?php
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/*
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 * This file is part of composer/pcre.
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 *
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 * (c) Composer <https://github.com/composer>
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 *
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 * For the full copyright and license information, please view
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 * the LICENSE file that was distributed with this source code.
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 */
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namespace Composer\Pcre;
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class PcreException extends \RuntimeException
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{
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    /**
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     * @param  string $function
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     * @param  string|string[] $pattern
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     * @return self
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     */
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    public static function fromFunction($function, $pattern)
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    {
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        $code = preg_last_error();
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        if (is_array($pattern)) {
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            $pattern = implode(', ', $pattern);
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        }
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        return new PcreException($function.'(): failed executing "'.$pattern.'": '.self::pcreLastErrorMessage($code), $code);
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    }
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    /**
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     * @param  int $code
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     * @return string
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     */
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    private static function pcreLastErrorMessage($code)
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    {
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        if (function_exists('preg_last_error_msg')) {
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            return preg_last_error_msg();
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        }
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        $constants = get_defined_constants(true);
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        if (!isset($constants['pcre']) || !is_array($constants['pcre'])) {
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            return 'UNDEFINED_ERROR';
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        }
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        foreach ($constants['pcre'] as $const => $val) {
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            if ($val === $code && substr($const, -6) === '_ERROR') {
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                return $const;
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            }
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        }
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        return 'UNDEFINED_ERROR';
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    }
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}