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PHP - Ofuscar Valor

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$test = 'hola';
echo $test ."";
$test = ofuscar( $test ); #Ida
echo $test ."";
$test = ofuscar( $test ); #Vuelta
echo $test ."";

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  1. function ofuscar( $str ){
  2.     $total = strlen ($str); $salida = "";
  3.     for ($i = 0 ; $i < $total; $i++) {
  4.         $j= ord( substr ($str, $i, 1) ) ;
  5.         $j= $j ^ $i ;
  6.         $salida .= chr($j);
  7.     }
  8.     return $salida;
  9. }
  10. $test = 'hola';
  11. echo $test ."<hr>";
  12. $test = ofuscar( $test ); #Ida
  13. echo $test ."<hr>";
  14. $test = ofuscar( $test ); #Vuelta
  15. echo $test ."<hr>";

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