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2) Write a PHP script to accept 2 strings from the user, the first string should be a sentence and second can be a word. a. Delete a small part from first string after accepting position and number of characters to remove. b. Insert the given small string in the given big string at specified position without removing any characters from the big string. c. Replace some characters/ words from given big string with the given small string at specified position. d. Replace all the characters from the big string with the small string after a specified position. (Use substr_replace() function)

 HTML CODE:

<html>
<body>
<form action="c2.php"method="GET">
     String 1:<input type="text" name="str1"><br><br>
     String 2:<input type="text" name="str2"><br><br>
     <p>Which operation do you want to perform?</p>
     <input type="radio" name="op" value="1">
          <label for="delete and remove">Delete small part from first string after accepting position and number of characters to remove.<label><br>
     <input type="radio" name="op" value="2">
          <label for="insert and remove">Insert the given small string in the given big string at specified position without removing any      characters from the big string.</label><br>  
     <input type="radio" name="op" value="3">
          <label for="replace some characters">Replace some characters/words from given big string with the given small string at specified position</label><br>  
     <input type="radio" name="op" value="4">
          <label for="replace all characters">Replace all the characters from the big string with the small string after a specified position<label><br>    
<input type="submit" value="submit">
</form>  
</body>
</html>


PHP CODE:

<?php

$s1=$_GET['str1'];
$s2=$_GET['str2'];
$ch=$_GET['op'];

switch($ch)
{
    case 1 : delete($s1);
             break;
           
    case 2 : insert($s1);
                 break;
               
        case 3 : replaces1($s1,$s2);
                 break;
                 
        case 4 : replaces2($s1,$s2);
                 break;
}

function delete($s1)
{
    $d=substr_replace($s1,' ',5,7);
    echo $d;
}

function insert($s1)
{
    $s3="dear";
    $i=substr_replace($s1,$s3,13,4);
    echo $i;
}


function replaces1($s1,$s2)
{
    $rep=substr_replace($s1,$s2,5,7);
    echo $rep;
}

function replaces2($s1,$s2)
{
    $re=substr_replace($s2,$s1,0,5);
    echo $re;
}

?>

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