travail sur les chaînes en php

string.php

<?php

$chaines[0] = "0@sn9sirppa@#?ia'jgtvryko1";
$chaines[1] = "q8e?wsellecif@#?sel@#?setuotpazdsy0*b9+mw@x1vj";
$chaines[2] = "aopi?sgnirts@#?sedhtg+p9l!";

foreach ($chaines as $key=>$value)
{
	$longuerChaine = strlen($value)/2;
	$sousChaines = substr($value, 5,$longuerChaine);
	$sousChaine = str_replace('@#?'," ",$sousChaines);
	$sousChaine = strrev($sousChaine);
	echo $sousChaine . " ";
}