- urldecode: documentation ( source)
- urlencode: documentation ( source)
- htmlspecialchars: documentation ( source)
<?php
$a = "77#77060605190001582640";
$b = "99ФД5113063";
$c = "26.08.2012";
echo urlencode($a)." - ".urldecode(urlencode($a));
echo htmlspecialchars($b)."<br>";
echo htmlspecialchars($c)."<br>";
?>