Would anybody have any suggestions on how to sort an array elements by the strlen of the values? For example:

Turn this array:

PHP Code:

$array = array(
  'world!',
  'hello',
  'hello world!'
); 


To sort like this (length descending):

Array (
  [0] => hello world!
  [1] => world!
  [2] => hello
)

I know you can do a usort to sort by an external user defined function, but I'm unsure how that works really.

PHP Code:

$array = array(
  'world!',
  'hello',
  'hello world!'
);

function cmp($a,$b){
  return (strlen($b)-strlen($a));
}

usort($array, "cmp"); 


Not sure if it will work, but this is what I come up with after reading the usort page.

Originally Posted by Insensus

PHP Code:

$array = array(
  'world!',
  'hello',
  'hello world!'
);
 
function cmp($a,$b){
  return (strlen($b)-strlen($a));
}
 
usort($array, "cmp"); 


Not sure if it will work, but this is what I come up with after reading the usort page.

Ah, very nice! I never took the proper time to fully learn how that function worked, but its starting to make sense now.

Thank you so much!