how to stop data automatically insert into database in php

Question

I have problem in this code. In this code when i press save data button , the data insert into database but when i refresh page then it\'s automatically insert into database, wh

Answer 1

This is happening because your action is empty

Update your action to this

action="<?php echo $_SERVER['PHP_SELF']; ?>"

Answer 2

Make a separate php file that will insert data to database. Give this in the form action attribute.

<form action="insert.php" method="post">
     ......
     ......
</form>

insert.php file

<?php 
require './database/databaseConnection.php';

if(isset($_POST['save_button']))
    {   
    if(($_POST['fname']&&($_POST['lname'])))
        {
        $first_name=$_POST['fname'];
        $last_name=$_POST['lname'];
        $qry="INSERT INTO user_master(first_name,last_name) values('$first_name','$last_name')";
        $result=  mysqli_query($qry)or die(mysql_error());
        if($result){           
            echo 'SuccessFully saved data';            
        }
        else{   
            echo 'Data Not Inserted!';            
        }       
        }   
    }
?>

You can use header() to redirect to your previous page if you want. Thus not allowing the refreshing of insert.php

header("location: your_page.php");

it will be safe if you use Prepared Statements Take a look