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Mar 18th, 2019
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  1. <?php
  2.  
  3.  
  4.  
  5. $message = "0@sn9sirppa@#?ia'jgtvryko1";
  6.  
  7. for ( $i = 5, $j = 0 ; $j < $keyNumber ; $j++, $i++ )
  8. {
  9. echo $message[5 + $j];
  10. }
  11. echo "<br>";
  12.  
  13.  
  14. function decodeString( $mes )
  15. {
  16.  
  17. $lenMes = strlen( $mes );
  18.  
  19. // je divise la longueur par 2
  20. $keyNumber = $lenMes /2 ;
  21.  
  22. // je recupère les $keyNumber caractere à partir de la 6eme lettre
  23. $subString = substr( $mes, 5, $keyNumber);
  24.  
  25. //remplace les séquences '@#?' par des ' '
  26. $mes = str_replace( '@#?', ' ', $subString);
  27.  
  28. // j'inverse la chaine
  29. $mes = strrev( $mes );
  30. echo $mes;
  31. echo "<br>";
  32. }
  33.  
  34. decodeString( "0@sn9sirppa@#?ia'jgtvryko1" );
  35. decodeString( "q8e?wsellecif@#?sel@#?setuotpazdsy0*b9+mw@x1vj" );
  36. decodeString( "aopi?sgnirts@#?sedhtg+p9l!" );
  37.  
  38.  
  39. ?>
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