PHP function to replace a (i)th-position character

Question

Is there a function in PHP that takes in a string, a number (i), and a character (x), then replaces the character at position (i) with (x)?

If not, can somebody help me in implementing it?

Answer 1

$str    = 'bar'; $str[1] = 'A'; echo $str; // prints bAr 

or you could use the library function substr_replace as:

$str = substr_replace($str,$char,$pos,1);