PHP String to Hex, Javascript Unescape

str_to_hex.php

<?php 
// Javascript/HTML hex encode 
function encode($input) 
{ 
    $temp = ''; 
    $length = strlen($input); 
    for($i = 0; $i < $length; $i++) 
        $temp .= '%' . bin2hex($input[$i]); 
    return $temp; 
} 

$str = encode('This is some sample text.'); 
?> 
<script language="javascript"> 
document.write( unescape( '<?php echo $str; ?>' ) ); 
</script>