Replace substrings with an incremented counter value

Question

Basically what I\'m looking for is the PHP version of this thread: Find, replace, and increment at each occurence of string

I would like to replace the keyword follow

Answer 1

preg_replace(array_fill(0, 5, '/'.$findme.'/'), range(1, 5), $string, 1);

Example:

preg_replace(array_fill(0, 5, '/\?/'), range(1, 5), 'a b ? c ? d ? e f g ? h ?', 1);

Output

a b 1 c 2 d 3 e f g 4 h 5