In this post, The function converter helps you convert grams, pounds to kilograms in PHP

1. Code:

  <?php 
   function convertWeightToKg($unit, $weight){
		switch (strtolower($unit)) {
			case "g":
				$conv = 1000;
				break;
			case "lb":
				$conv = 2.20462262;
				break;
			default:
				$conv = 1;
				break;
		}
		$weight = $weight / $conv;
		return $weight;
	}
    echo convertWeightToKg("lb", 10);
    echo convertWeightToKg("g", 12000);
    ?> 

2. Example:

Input:

Input 1: Weight unit: lb , Weight = 10
Input 2: Weight unit: g , Weight = 12000

Output:

Output 1: 4.5359237
Output 2: 12