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My isset() function runs before i click the button


GamesBond008

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<?php
if(isset($_POST["submit"])) {
$fullName = $_POST["fullname"];
$errors = array();
if(empty($fullName)){
array_push($errors, "Fullname is empty");
if (count($errors)>0) {
foreach($errors as $error) {
echo $error;}
}
}
?>

<html>
<head>
  <title>Help</title>
  </head>
  <body>
  <input class="submit-btn" name="submit" value="Register">
  </body>
</html>
  

if i use this code, it says Fullname is empty before i click the button i wanna check if something is missing while someone hits Register

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How is this script executed the first time?  From the address bar of your web page? Or from a command that you issue?  Obviously it has to be started somehow and that means that you either triggered it from a submit that is from a form that was sent to the user by a different script.  If not that is your problem.  The form in this script is not being sent until your code runs and that is your query. Also - Your form only contains a text field and no buttons.  And I wouldn't name my text field 'submit' since it is NOT a submit button.  The default value of an input tag is 'text' I believe.

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  • You really have to use an editor with indentation and make sure that you are matching braces. 
    • The code you provided is missing a matching bracket.
  • There's also an obvious problem which is that you output errors, before you've started the html section of the page (in cases where there is an error). 
    • This will at best malform your html document.
  • The other issue is that you don't have a form, nor does that form set the method to make a POST, so there's no way that the code can work as you intended.
    • You also don't have a form element to test against  

Here's something more likely to work, based on what you provided:

 

<?php
    $errors = array();
    if (!empty($_POST["submit"])) {
        $fullName = $_POST["fullname"];

        if (empty($fullName)) {
            array_push($errors, "Fullname is empty");
        }
    }
?>
<!DOCTYPE html>
<html>
    <head>
        <title>Help</title>
    </head>

    <body>
        <?php if (count($errors)>0): ?>
            <ul>
                <?php foreach($errors as $error): ?>
                    <li><?= $error ?></li>
                <?php endforeach ?>
            </ul>
        <?php endif ?>
        <form method="POST">
            <input name="fullname" type="text">
            <input class="submit-btn" name="submit" type="submit"  value="Register">
        </form> 
    </body>
</html>

 

 

 

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