What are common reasons for a form being displayed twice in PHP applications?

Common reasons for a form being displayed twice in PHP applications can include accidentally including the form code twice in the HTML file, using a JavaScript function to dynamically add the form to the page multiple times, or submitting the form without proper validation and then displaying it again on the same page. To solve this issue, ensure that the form code is included only once in the HTML file, check for any JavaScript functions that may be duplicating the form, and validate the form submission before displaying it again. 

<?php
// Check if the form has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate form data
    // If validation fails, display the form again
} else {
    // Display the form
}
?>

Keywords

form duplication PHP applications rendering error session management browser caching

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