Online PHP editor | refs for NI5tAS

<?php $str = 'ajf097ebalu42784693052895=gs 0 1 2 3 4 5 6 7 8 9 0 � 10 20 30 ! " # $ % & \' 40 ( ) * + , - . / 0 1 50 2 3 4 5 6 7 8 9 : ; 60 < = > ? @ A B C D E 70 F G H I J K L M N O 80 P Q R S T U V W X Y 90 Z [ \ ] ^ _ ` a b crg@%$Udtth245456769-_23574690-_-+rwyeyfw,./\',mnbvcxzawerty`'; echo preg_replace('~[^\d]~', '~~', '', $str);