How can I delete values from input fields after submitting

Question

How exactly is IF EXIST function used in MySQL? Alternatively, how can one make sure that the values previously filled into the input fields are cleared completely so that they are not re-posted once the page is reloaded?

This is a slice of my code

<?php
function testInput($data){
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    return $data;
}

if($_SERVER['REQUEST_METHOD']=='POST'){
    $user = testInput($_POST['userName']);
    $fName = testInput($_POST['fName']);
    $lName = testInput($_POST['lName']);
    $fPass = md5(testInput($_POST['fPass']));
    $rPass = md5(testInput($_POST['rPass']));
    $gender = testInput($_POST['gender']);
}               
?>

I want to make sure that the value of my variables='' every time I refresh my page.

Make a header('Location: ...'); redirect to the same page. — putvande
– putvande, Commented Jul 8, 2014 at 16:25

vico · Accepted Answer · 2014-07-08 16:36:05Z

2

What you are looking for is to prevent repost or backbutton repost

there are many ways to do this

use of session cookie and only allow that session to post once in php
using ajax to post to self or a new page in php so refreshing or backing will prevent repost
iframe the form will also do the trick
Post + Redirect to self

edited Jul 8, 2014 at 16:36

answered Jul 8, 2014 at 16:30

vico

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2 Comments

user3386046 Over a year ago

exactly, I am trying to prevent the repost...I would go with the first option as I am somewhat unfamiliar with the other options...Thank you. W

vico Over a year ago

@user3386046 Most common approach are use of ajax api.jquery.com/jquery.post or just redirect to same page (which will clear the post data)

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