Hex2String/String2Hex

<?php
// Hex2String/String2Hex
// Coded by Bagaz [ T1KUS90T ]
// Thanks to my friends
function string_hex($string){
    $hex = "";
    for($i=0; $i<strlen($string); $i++){
        $ord = ord($string[$i]);
        $decimal = dechex($ord);
        $hex .= substr('0'.$decimal, -2);
  }
    return $hex;
}
function hex_string($hex){
    $string="";
    for ($i=0; $i < strlen($hex)-1; $i+=2){
        $string .= chr(hexdec($hex[$i].$hex[$i+1]));
    }
    return $string;
}
print "===========================\n# Hex2String and String2Hex\n# Bagaz [ T1KUS90T ] \n============================\n1. Hex2String\n2. String2Hex\n>> ";
$menu = fgets(STDIN);
if($menu == 1) {
    print "= Hex2String =\n>> ";
    $hex = fgets(STDIN);
    print ">> ".hex_string($hex)."\n";
} elseif($menu == 2) {
    print "= String2Hex =\n>> ";
    $string = fgets(STDIN);
    print ">> ".string_hex($string)."\n";
} else {
    print "T1KUS90T [ http://www.facebook.com/T1KUS90T ]\n";
}
?>