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<?php $pattern = '/((?<!\w)#\w+)/i'; $subject = <<<EOT Blablalb #toto zdjsdf #ho_yeah EOT; $result = []; preg_replace_callback('/((?<!\w)#\w+)/i', function ($matches) use(&$result) { var_dump($matches); }, $subject); var_dump($result);

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34.6 ms | 402 KiB | 5 Q