In this program, we are adding the string into the previously entered string. To do so we are using the built-in function substr_replace(). For this, we first have to assign the string into the variable string then assign the string which should be added to the original string into the variable w and assign the position where the string should be added to the variable pos. After that to add the variable w into the variable string use the built-in function substr_replace(string, word, pos, 0) and at last print the value of the variable string
Syntax of function substr_replace()
substr_replace(string,replacement,start,length)
Step 1: Assign the string into the variable string
Step 2: Assign the word which should be added to the string into the variable w
Step 3: Assign the position where the string should be added to the variable pos
Step 4: Add the value in the variable w to the variable string by using the built-in function substr_replace(string, word, pos,0) and print the result
<?php
$string = 'learntutorials.com';
echo "Orginal string: $string \n";
$w = 'E';
$pos = 5;
echo "String after change: " . substr_replace($string, $w, $pos, 0);
?>
Orginal string: learntutorials.com String after change: learnEtutorials.com