Basic php Login form with defined Name and Password

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479 votes

2 answers

Basic php Login form with defined Name and Password

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PHP

PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites. The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/

HTML

HTML (English "hyper text markup language" - hypertext markup language) is a special markup language that is used to create sites on the Internet. Browsers understand html perfectly and can interpret it in an understandable way. In general, any page on the site is html-code, which the browser translates into a user-friendly form. By the way, the code of any page is available to everyone.
https://www.w3.org/html/

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score 78 · Answer 1

Answer

Solution:

The first time you run this script, the$_POST['username'] (and password) isn't defined.

What you have to do is check if it's defined like this:

if(isset($_POST['username']) && $_POST['username'] == "user" && isset($_POST['password']) &&  $_POST['password']=="user")

Here's an link about the isset function

Also, do the check on top of the page. Because you'r already sending content, your redirect won't work.

header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP

score 391 · Answer 2

Answer

Solution:

First check that you really have some $_POST data:

if (!empty($_POST)) {
    // then check your username and password
    if($_POST['username'] =="user" && $_POST['password']=="user")
    {
        header("Location: contact.php");
    }
    else 
    {
        // display error
    }
}