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  1. <?php
  2.  
  3. $username = "user gmail.com";
  4.  
  5. if (!preg_match('/^[\w-.@]+$/', $username)) {
  6.    echo 'nao passou';
  7. } else{
  8.    echo 'passou';
  9. }
  10.  
  11. echo ' / ';
  12.  
  13. $username = "user@_gmail.com";
  14.  
  15. if (!preg_match('/^[\w-.@]+$/', $username)) {
  16.    echo 'nao passou';
  17. }else{
  18.    echo 'passou';
  19. }
Success #stdin #stdout 0.02s 23572KB
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Standard input is empty
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nao passou / passou
https://ideone.com/kKgllI
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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