PHP毫米（mm）到英寸（in）和千克（kg）到磅（lb）转换

Hi I'm trying to convert Millimeter (mm) to Inch (in) and Kilogram (kg) to Pound (lb) Convert in PHP. Is there any function that does this ? How would I do this ? Thank you.

You can write your own functions like this very easily.

function mmToIn ($val) {
  return $val * 0.0393701
}

function kgToLb ($val) {
  return $val * 2.20462
}

I think you need write you own code for these operations (cos I have never heard about any built in function that doing what you want).

First: https://www.google.com/search?q=millimeter+to+inches

Second:

function mil_to_inc($mil) {
   $inc = 0.0393700787;
   return $mil * $inc;
}

// example
$_5_mil_to_inc = mil_to_inc(5); // will give you 0.196850394 etc..