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  1. <?php
  2.  
  3. // your code goes here<?php
  4. class valida {
  5. 	protected $cpf;
  6. public function cpf($cpf) {
  7.     if ($cpf && strlen($cpf) == 11) {
  8.         $this->$cpf = $cpf;
  9.         return $this->$cpf;
  10.     }
  11. }
  12.  
  13. }
  14. class manda extends valida {
  15. 	function foo($cpf) {
  16. 		$cpf = cpf($cpf);
  17. 	}
  18. }
  19.  
  20. $cpf1 = $_GET['cpf'];
  21.  
  22. $sis = new manda;
  23. echo $sis->cpf($cpf1);
Success #stdin #stdout #stderr 0.02s 23344KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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PHP Notice:  Undefined index: cpf in /home/z0dFqw/prog.php on line 20
https://ideone.com/Ws6Trl
language:
PHP (php 7.3.5)
created:
5 years ago
visibility:
public

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