Sort PHP Arrays By Pair Value Length

Below is a simple user defined sort comparison callback function using uasort().

The Sort Callback Function

function sort_length_desc($a, $b) {
  $alen = strlen($a);
  $blen = strlen($b);
 
  if ($alen < $blen)
    return 1;
  elseif ($alen == $blen)
    return 0;
  else
    return -1;
}

Testing The Sort Callback

  $array = array(
      'test',
      'test two',
      'test number three',
      'test four',
    );
 
  uasort($array, 'sort_length_desc');

Sorting Results

test number three
test four
test two
test

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