Let's say I have a string, that contains random numbers and letters:
$string = '12hd67dgbf40dkfgeqw647nkd873d73';
I would like to put spaces in this string after every 4th character, so that the sting would look like:
12hd 67dg bf40 dkfg eqw6 47nk d873 d73
The technique would need to work on strings of any length.
I have some ideas, but they're all pretty rough. I am guessing there must be some PHP function I could use to help me.