Write a PHP program to get the Hamming numbers upto a given numbers also check whether a given number is a Hamming number

<?php
function is_hamming_numbers($x)
 {
    if ($x == 1)
	{
		return "Hamming Number";
	}
	if ($x % 2 == 0)
	{
		return is_hamming_numbers($x/2);
	}
	
	if ($x % 3 == 0)
	  {
		return is_hamming_numbers($x/3);
	  }
	if ($x % 5 == 0)
	{
		return is_hamming_numbers($x/5);
	}	
   return "Not a Hamming Number";
 }

function hamming_numbers_sequence($x)
{
	if ($x == 1)
	 {
		return "Hamming Number";
	 }
	hamming_numbers_sequence($x-1);
	if (is_hamming_numbers($x) == "Hamming Number")
	{
		echo($x).",";
	}
}

print_r(is_hamming_numbers(7)."\n");
print_r(is_hamming_numbers(1)."\n");

hamming_numbers_sequence((24).("\n"));
?>