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  1. <?php
  2.  
  3. $check = preg_replace( '/(?:[0-9%]|p[xt]|[ec]m|auto)(*SKIP)(*F)|./', '', '5sdfasdfp');
  4. echo $check;
Success #stdin #stdout 0.01s 82944KB
comments (?)
stdin 
Standard input is empty
stdout 
5
https://ideone.com/h3QqrN
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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