Plain-Text to Binary

<?php
echo "<form>Plain-Text String: <input type='text' name='ascii' width=50><input type='text' name='delimiter' width=50><input type='submit' value='Submit'></form><br/>";
 
function eight_binary($input) {
	if (strlen(decbin($input)) < 8) {
do {
	$bin .= "0" . decbin($input);
		} while (decbin($input) <= 8);
		return $bin;
	} else {
	return dec_bin($input);
} }
 
if (empty($_GET["delimiter"])) {
	$delimiter = "";
} else {
	$delimiter = $_GET["delimiter"];
}
if (empty($_GET["ascii"])) {
	echo "Please input a string.";
} else {
		//Explode into arrays
		$orig_exp = str_split($_GET["ascii"]);
		//Do the conversion
		for ($i=0; $i<count($orig_exp); $i++) {
			$binary_string .= $delimiter . eight_binary(ord($orig_exp[$i]));
			$ascii_string .= $delimiter . ord($orig_exp[$i]);
			}
		echo "ASCII :: " . $ascii_string . "<br>";
		echo "Binary :: " . $binary_string . "<br>";
		//END
}
?>