How to convert inch or meter to centimeter in PHP?

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

1. Code:

    ';
    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
PHP