In this post, we use this calculation tool to convert quickly and easily between inches and centimeters , meter in PHP.

1. Code:

    <?php 
    function convertLengthToCm($unit, $length){
		if ("in" === strtolower($unit)) {
			// 1 inch = 2.54 cm
			$length = $length * 2.54;
			//$length = round($length, 2);
		}
		if ("m" === strtolower($unit)) {
			$length = $length * 100;
		}
		return $length;
	}
    $length = 8.5;
    echo convertLengthToCm("in", $length);
	echo '<br/>';
    echo convertLengthToCm('m', $length);
    ?> 

2. Example:

Input:

Input 1: length = 8.5 , unit = in
Input 2: length = 8.5 , unit = m

Output:

Output 1: 21.59 cm
Output 2: 850 cm