How to insert a string in the specified position in PHP

PHP has a built-in substr_replace() function by using that we can insert a string at the specified position.

In this below example, we are inserting the mr after the Hi in the following string.

$greet= "Hi gowtham";

$newstr = substr_replace($greet," mr", 2, 0);

echo $newstr;

Output:

Hi mr gowtham

Syntax

substr_replace($old_str, $insert_str, $start, $length)

1. $old_str is the input string.
2. $insert_str is the string you need to insert into the $old_str.
3. $start is the position you need to choose to start inserting the string.
4. $length is how many characters you need to remove from the start position.