3v4l.org

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<?php $moj = preg_match ('/^((LF@)|(TF@)|(GF@))([[:alnum:]]|[-_$&%*])+/','LF@_4čŠČŘŽÝÁÍÉ4A'); echo $moj;
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29.46 ms | 402 KiB | 5 Q