Question

I’m looking for a way to separate number from its unit – like 400px (400 + px), 30em (30 + em), 5% (5 + %) etc.

It’s perhaps something simple but I couldn’t find any pre-made functions in PHP manual to do that.

Let’s say that I have this:

$variable = "50px";
// and this is what I need:
$result = array(50, 'px');

Answer 1

try This

<?php
$str = '400px';
$arr = preg_split('/(?<=[0-9])(?=[a-z]+)/i',$str);                                                               
print_r($arr);

than you will get array like

Array
(
    [0] => 400
    [1] => px
)

and now you can get

  echo  $arr[0]; //for 400
  echo $arr[1];  // for px

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