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  1. <?php
  2.  
  3. $pseudo = "dfg57_e";
  4. preg_match ( "#^[a-zA-Z0-9_]{4,64}$#", $pseudo, $m );
  5. print_r($m);
Success #stdin #stdout 0.02s 52480KB
comments (?)
stdin 
Standard input is empty
stdout 
Array
(
    [0] => dfg57_e
)
https://ideone.com/D5T6M7
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
secret

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