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  1. <?php
  2.  
  3. function validate($email) {
  4.     if (preg_match('/^(\\w+[\\w\.\+\-]+)?\\w+@(\\w+\.)+\\w+$/iu', $email)) {
  5.        return 'valid'; 
  6.     }
  7. 	return 'invalid';
  8. }
  9.  
  10. // valid
  11. var_dump(validate('tom@site.com'));
  12. var_dump(validate('tom@сайт.рф'));
  13.  
  14.  
  15. // invalid
  16. var_dump(validate('tom@site'), validate('tomsite.com'));
Success #stdin #stdout 0.01s 24144KB
comments (?)
stdin 
Standard input is empty
stdout 
string(5) "valid"
string(5) "valid"
string(7) "invalid"
string(7) "invalid"
https://ideone.com/zAxDpx
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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