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  1. <?php
  2. $a = 1;
  3.  
  4. /**** Look at memory ****/
  5.  
  6. /*
  7.  _________________________________________
  8. |pointer | value |       variable's       |
  9.  -----------------------------------------
  10. | 1      |  1    |     $a                 | 
  11.  -----------------------------------------  */
  12.  
  13. $b =& $a;
  14.  
  15. /*
  16.  _________________________________________
  17. |pointer | value |       variable's       |
  18.  -----------------------------------------
  19. | 1      |  1    |     &a, $b             | 
  20.  -----------------------------------------  */
  21.  
  22. unset($a); 
  23.  
  24. /*
  25.  _________________________________________
  26. |pointer | value |       variable's       |
  27.  -----------------------------------------
  28. | 1      |  1    |     $b                 | 
  29.  -----------------------------------------  */
  30.  
  31.  
  32. printf("Variable b is pointing to the pointer 1 which value = %d",$b);
  33.  
  34. ?>
Success #stdin #stdout 0.02s 13112KB
comments (?)
stdin 
Standard input is empty
stdout 
Variable b is pointing to the pointer 1 which value = 1
https://ideone.com/fMIUz
language:
PHP (php 7.3.5)
created:
14 years ago
visibility:
public

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