Convert Numbers into words

<?php

/*Coded By Amir Salah :-) */

$num = 531; /* The Number */

$leng = strlen($num); /* The Length */

	/* ones Function */
	function one($num){
		$one     = substr($num, -1, 1);
		return $one;
	}
	/* tens Functions */
	function ten($num){
		$ten     = substr($num, -2, 1);
		return $ten;
	}
	/* Hundreds functions */
	function hund($num){
		$hund    = substr($num, -3, 1);
		return $hund;
	}
	/* Thousands Function */
	function thou($num){
		$thou    = substr($num, -4, 1);
		return $thou;
	}
	/* if it was 4 digits number */
	if ($leng == 4){
		 $one = one($num);
		 $ten = ten($num);
		 $hund = hund($num);
		 $thou = thou($num);
	}
	/* if it was 3 digits number */
	if ($leng == 3){
		 $one = one($num);
		 $ten = ten($num);
		 $hund = hund($num);
	}
	/* if it was 2 digits number*/

	if ($leng == 2){
		 $one = one($num);
		 $ten = ten($num);
	}
	/* if it was 1 digit number */
	if ($leng == 1){
		 $one = one($num);
	}
	
			/* ones */
				if(isset($one)){
					if($one == 1){
						if($leng == 2){
						
							if($ten == 1){
									$ones = \"eleven\";
							}
							else
							{
									$ones = \"one\";
							}
						
						}else{
						$ones = \"one\";
						}
					}
					if($one == 2){
						if($leng == 2){
							if($ten == 1){
									$ones = \"twelve\";
							}
							else
							{
									$ones = \"two\";
							}
						}else{
						$ones = \"two\";
						}
					}
					if($one == 3){
						if($leng == 2){
							if($ten == 1){
									$ones = \"thirteen\";
							}
							else
							{
									$ones = \"three\";
							}
						}else{
						$ones = \"three\";
						}
					}
					if($one == 4){
						if($leng == 2){
							if($ten == 1){
									$ones = \"fourteen\";
							}
							else
							{
									$ones = \"four\";
							}
						}else{
						$ones = \"four\";
						}
					}
					if($one == 5){
						if($leng == 2){
							if($ten == 1){
									$ones = \"fifteen\";
							}
							else
							{
									$ones = \"five\";
							}
						}else{
						$ones = \"five\";
						}
					}
					if($one == 6){
						if($leng == 2){
							if($ten == 1){
									$ones = \"sixteen\";
							}
							else
							{
									$ones = \"six\";
							}
						}else{
						$ones = \"six\";
						}
					}
					if($one == 7){
						if($leng == 2){
							if($ten == 1){
									$ones = \"seventeen\";
							}
							else
							{
									$ones = \"seven\";
							}
						}else{
						$ones = \"seven\";
						}
					}
					if($one == 8){
						if($leng == 2){
							if($ten == 1){
									$ones = \"eighteen\";
							}
							else
							{
									$ones = \"eight\";
							}
						}else{
						$ones = \"eight\";
						}
					}
					if($one == 9){
						if($leng == 2){
							if($ten == 1){
									$ones = \"nineteen\";
							}
							else
							{
									$ones = \"nine\";
							}
						}else{
						$ones = \"nine\";
						}
					}
				}

/* Tens */
if(isset($ten)){
	if($num == 10){
		$tens = \"ten\";
	}
	if($ten == 2){
		$tens = \"twenty\";
	}
	if($ten == 3){
		$tens = \"thirty\";
	}
	if($ten == 4){
		$tens = \"fourty\";
	}
	if($ten == 5){
		$tens = \"fifty\";
	}
	if($ten == 6){
		$tens = \"sixty\";
	}
	if($ten == 7){
		$tens = \"seventy\";
	}
	if($ten == 8){
		$tens = \"eighty\";
	}
	if($ten == 9){
		$tens = \"ninty\";
	}
}
/* Hundreds */
if(isset($hund)){
	if($hund == 1){
		$hunds = \"one hundred\";
	}
	if($hund == 2){
		$hunds = \"two hundred\";
	}
	if($hund == 3){
		$hunds = \"three hundred\";
	}
	if($hund == 4){
		$hunds = \"four hundred\";
	}
	if($hund == 5){
		$hunds = \"five hundred\";
	}
	if($hund == 6){
		$hunds = \"six hundred\";
	}
	if($hund == 7){
		$hunds = \"seven hundred\";
	}
	if($hund == 8){
		$hunds = \"eight hundred\";
	}
	if($hund == 9){
		$hunds = \"nine hundred\";
	}
}
/* Thousands */
if(isset($thou)){
	if($thou == 1){
		$thous = \"one thousand\";
	}
	if($thou == 2){
		$thous = \"two thousand\";
	}
	if($thou == 3){
		$thous = \"three thousand\";
	}
	if($thou == 4){
		$thous = \"four thousand\";
	}
	if($thou == 5){
		$thous = \"five thousand\";
	}
	if($thou == 6){
		$thous = \"six thousand\";
	}
	if($thou == 7){
		$thous = \"seven thousand\";
	}
	if($thou == 8){
		$thous = \"eight thousand\";
	}
	if($thou == 9){
		$thous = \"nine thousand\";
	}
}

echo \"<br />\";
/* print Thousands */
if(isset($thous)){
	echo $thous;
}

echo \" \";

/* Print Hundreds */
if(isset($hunds)){
	echo $hunds;
}

echo \" \";

/* print Tens */

if(isset($tens)){
	if($ten != 1 and $one == 0)
	{
		echo $tens;
		
	}
	else
	{
	echo $tens;
	}

	
}

echo \" \";
/* Print Ones */
if(isset($ones)){
	echo $ones;
}

?>