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

Wordwrap does exactly what you want:

echo wordwrap('12345678' , 4 , ' ' , true )

will output: 1234 5678

If you want, say, a hyphen after every second digit instead, swap the "4" for a "2", and the space for a hyphen:

echo wordwrap('1234567890' , 2 , '-' , true )

will output: 12-34-56-78-90

Reference - wordwrap