j'y go bonne chance.
V'la l'algo de decryptage si vous avez besoin:
<?php
$var=strtolower("Texte");
$var=str_replace("a","Z",$var);
$var=str_replace("b","P",$var);
$var=str_replace("c","V",$var);
$var=str_replace("d","Y",$var);
$var=str_replace("e","R",$var);
$var=str_replace("ç","V",$var);
$var=str_replace("é","R",$var);
$var=str_replace("f","W",$var);
$var=str_replace("g","D",$var);
$var=str_replace("h","C",$var);
$var=str_replace("i","B",$var);
$var=str_replace("j","Q",$var);
$var=str_replace("k","E",$var);
$var=str_replace("l","U",$var);
$var=str_replace("m","S",$var);
$var=str_replace("n","F",$var);
$var=str_replace("o","A",$var);
$var=str_replace("p","X",$var);
$var=str_replace("q","G",$var);
$var=str_replace("r","M",$var);
$var=str_replace("s","T",$var);
$var=str_replace("t","I",$var);
$var=str_replace("u","H",$var);
$var=str_replace("v","J",$var);
$var=str_replace("w","N",$var);
$var=str_replace("x","K",$var);
$var=str_replace("y","O",$var);
$var=str_replace("z","L",$var);
echo "\n";
echo $var;
echo "\n";
?>