To write PHP in English sort, how to solve

Write PHP in English sort
Such as:
A
Acb
Abc
Aca
Aaaa


Can be lined up as:
A,aaaa,abc,aca,acb
That is, a row in front, Z is the last, the first letter from A-Z, the second third is infinitely from A-Z order.
PHP English Sort

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------Solution--------------------
This demand is more alternative

$a = Array (
  ' A ',
  ' ACB ',
  ' ABC ',
  ' ACA ',
  ' AAAA ',
);

$m = max (Array_map (' strlen ', $a));
foreach ($a as $v) {
  $c = substr ($v,-1);
  $t [] = Str_pad ($v, $m, $c);
}
Array_multisort ($t, $a);
Print_r ($a);

Array
(
[0] = a
[1] = = AAAA
[2] = ABC
[3] = ACA
[4] = ACB
)

------Solution--------------------
References:

This demand is more alternative

$a = Array (
  ' A ',
  ' ACB ',
  ' ABC ',
  ' ACA ',
  ' AAAA ',
);

$m = max (Array_map (' strlen ', $a));
foreach ($a as $v) {
  $c = substr ($v,-1);
  $t [] = Str_pad ($v, $m, $c);
}
Array_multisort ($t, $a);
Print_r ($a);

Array
(
[0] = a
[1] = = AAAA
[2] = ABC
[3] = ACA
[4] = ACB
)

Why not use the sort row directly?
------Solution--------------------
System functions can do it.

$arr = Array (
' A ',
' ACB ',
' ABC ',
' ACA ',
' AAAA '
);
Sort ($arr);

Print_r ($arr);

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