Add space after every 4th character

Question

I want to add a space to some output after every 4th character until the end of the string. I tried:

$str = $rows[\'value\'];


        

Answer 1

You can use chunk_split [docs]:

$str = chunk_split($rows['value'], 4, ' ');

DEMO

If the length of the string is a multiple of four but you don't want a trailing space, you can pass the result to trim.