Convert float to array of bytes in PHP

Question

I need to convert a float value into 4 bytes.

In javascript I usually do it with this code:

  var farr = new Float32Array(1);
  farr[0] = 26.75;
  var barr = new Int8Array(farr.buffer);
  console.log(barr[0]+","+barr[1]+","+barr[2]+","+barr[3]); 
  //26.75 => 0,0,-42,65
  //26.85 => -51,-52,-42,65

I want to do it in php instead of javascript. I it possible?

Answer 1

try to use pack and unpack function:

$f = 26.75;
$ar = unpack("c*", pack("f", $f));

print_r($ar);

Result:

Array
(
  [1] => 0
  [2] => 0
  [3] => -42
  [4] => 65
)

you can find a snippet here