php - Insert string at specified position

Question

Is there a PHP function that can do that?

I'm using strpos to get the position of a substring and I want to insert a string after that position.

Answer 1

$newstr = substr_replace($oldstr, $str_to_insert, $pos, 0);

http://php.net/substr_replace

In the above snippet, $pos is used in the offset argument of the function.

offset
If offset is non-negative, the replacing will begin at the offset'th offset into string.

If offset is negative, the replacing will begin at the offset'th character from the end of string.