CODEWITHSUNDEEP
phphtmlforms
user3081098
user3081098

Reputation: 37

$_POST superglobal does not contain the expected data after an HTML form submission

<html>
<head>
<title>A BASIC HTML FORM</title>
<?PHP
$username = $_POST['username'];
print ($username);
?>
</head>
<body>

<form name ="form1" method ="POST" action = "allNewPractice.php">
<input type = "text" value ="username">
<input type = "submit" name = "submit1" value = "login">
</form>
</body>
</html>

The name of this file, as you can probably tell, is "allNewPractice.php" and I use localhost/allNewPractice.php directly through my browser to access it, not through notepad++'s run. it doesn't work whatsoever; its supposed to print the information I typed into the text box to the page but The page does NOTHING.When I click the login button the page only refreshes, shows the original text box and the login button, but doesn't show what i entered. I got the tutorial from http://www.homeandlearn.co.uk/php/php4p6.html what am i doing wrong? Is there something wrong with my computer?

Upvotes: 0

Views: 267

Answers (3)

Mark Miller
Mark Miller

Reputation: 7447

First, you need to add a name attribute to the input box, as such:

<input type = "text" value ="username" name="username">

When you call $_POST['username'], it is referencing the name attribute, not the value.

Second, you are setting the value of $username before anything has been posted. This will result in an error, undefined variable: username, because $_POST['username'] does not exist when you first load the page. Not until after you submit the form will it have a value. So, you need to check if the form has been submitted first:

if (isset($_POST['submit1'])) {
    // Process data from form
}

Here is a complete and working version of your program:

<?php
    if (isset($_POST['submit1'])) {
        $username = $_POST['username'];
        print ($username);
    }
?>
<html>
    <head>
        <title>A BASIC HTML FORM</title>
    </head>
    <body>

        <form name ="form1" method ="POST" action = "allNewPractice.php">
            <input type = "text" value ="username" name="username">
            <input type = "submit" name = "submit1" value = "login">
        </form>

    </body>
</html>

Upvotes: 0

Ranga6669
Ranga6669

Reputation: 1

try this. personally i just dont seem to use the post method but it works

<html>
<head>
<title>A BASIC HTML FORM</title>   

<?PHP
if ($_GET['username']) {
$user = $_GET['username'];
echo $user;
}else{
echo "no text";
}
?>
</head>
<body>

<form method ="GET" action = "allNewPractice.php">
<input id="username" name="username" type="text" placeholder="username">
<input type = "submit" id = "submit" value = "login">

</form>
</body>
</html>

Upvotes: 0

Marc B
Marc B

Reputation: 360712

Learn basic HTML forms:

<input type = "text" value ="username">

Inputs with no name do not submit anything. It should be

<input type="text" name="username" value="somevalue" />
                   ^^^^^^^^^^^^^^^----must be present.

Upvotes: 2

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