PHP coding to display URL input from HTML form

Question

Need help identifying the problem with the following basic html/php code which works correctly when I input plain text in the textarea. Why does it return blank page when I enter a URL e.g. http://www.example.com?

<form action="" method="POST">
<textarea rows="10" cols="100" name="userdata">
<?=$_POST["userdata"];    ?></textarea>
<input type="submit" name="submit" value="Send" />
</form>
<?php
echo $_POST["userdata"];
?>

There's an error in your code $_POST["userdata"] does not exist — Chay22
– Chay22, Commented Jun 20, 2016 at 13:09
Is this the complete code you are using? Because this code doesn't blank out on me... — RichardBernards
– RichardBernards, Commented Jun 20, 2016 at 13:13

Niklesh Raut · Accepted Answer · 2016-06-20 13:14:15Z

1

When you load page first time value of $_POST["userdata"] is not set and is empty. and when your submit then only its value changed. just because of post data.

If you again hard refresh then its value will be empty. because of not post.

Simply I must say, store data in DB and fetch and then display. To do so

Post your value to another page or if in same page check by isset($_POST['userdata']) and store into db.
And Fetch from db before your html and display into textarea.

answered Jun 20, 2016 at 13:14

Niklesh Raut

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2 Comments

ʰᵈˑ Over a year ago

This doesn't solve OP's issue of "enter a URL, it will return a blank page" - only the hard refreshing issue... (unless I've misread the OP and this)

Niklesh Raut Over a year ago

@ʰᵈˑ I assumed its not about page its about textarea by this works correctly when i input plain text in the textarea

DimaS · Accepted Answer · 2016-06-20 13:32:51Z

0

You code is working. Only first time you open the page $_POST["userdata"] does not exist yet, so try this code:

<form action="" method="POST">
<textarea rows="10" cols="100" name="userdata">
<?php 
    if (isset($_POST["userdata"])) {
        echo $_POST["userdata"];
    } 
?>
</textarea>
<input type="submit" name="submit" value="Send" />
</form>
<?php
    if (isset($_POST["userdata"])) {
        var_dump( $_POST["userdata"]);   
    } else{
        echo 'No data';
    }
?>

When you see a blank page it is an error, to see all errors, put this code on the beginning of you page:

<?php
ini_set('error_reporting', E_ALL);
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
?>

edited Jun 20, 2016 at 13:32

answered Jun 20, 2016 at 13:26

DimaS

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