PHP: Best way to split string into alphabetic and numeric components

Question

I have several strings of the format

AA11
AAAAAA1111111
AA1111111

Which is the best (most efficient) way to sepa

Answer 1

This seems to work but when you try to pass something like "111111", it doesn't.

In my application, I am expecting several scenarios and what seems to be doing the trick is this

$referenceNumber = "AAA12132";
$splited = preg_split('/(\d+)/', $referenceNumber, -1, PREG_SPLIT_DELIM_CAPTURE);
var_dump($splited);

Note:

1. Getting an array of 2 elements, it means the 0th index is the alpha while the 1st is the numerics.
2. Getting array of just 1 element, means the 0th element is the numeric and no alphas.
3. If you get more than 2 array items, then your string must be in this format “AAA1323SDC”

So given the above, you can play around with it based on your use case.

Cheers!