Question

hello need help in regex i use this to split strings with capital letters like OldMcDonald
preg_split('/(?=[A-Z])/', $data, -1, PREG_SPLIT_NO_EMPTY);

output 
[0] => Old 
[1] => Mc 
[2] => Donald 

now i need to split strings like MWTTH
i need to tell the regex that a T with a letter H is one word how can i apply in my regex?

need the output: 
[0] => M 
[1] => w 
[2] => T 
[3] => TH

when i tried

$array = preg_split('/(?=[A-Z][TH])/', $data, -1, PREG_SPLIT_NO_EMPTY);

Output is

Array
(
    [0] => MTW
    [1] => F
    [2] => TH
)  

MTH Does not break appart, No time to study regex now.

Answer 1

I should have studied a little further i could have got it, anyway i already found it out i used:

$data = 'MTWFTH';
$array = preg_split('/(?=TH|M|T|W|F|S)/', $data, -1, PREG_SPLIT_NO_EMPTY);

OUTPUT

array (size=5)
  0 => string 'M' (length=1)
  1 => string 'T' (length=1)
  2 => string 'W' (length=1)
  3 => string 'F' (length=1)
  4 => string 'TH' (length=2)

while this will only work for predefined data like mine.