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  1. <?php
  2. if (!@$a) {
  3.   	$a = 1;
  4. } else {
  5. 	$a = 2;
  6. }
  7. $a = null;
  8. echo $a; //undefined
  9.  
  10. if (!$a) {
  11.   	$a = 1;
  12. } else {
  13. 	$a = 2;
  14. }
  15.  
  16. echo $a; //1
Success #stdin #stdout 0.01s 24408KB
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1
https://ideone.com/F4ERQm
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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