What troubleshooting steps can be taken when the upload button seems unresponsive and no error messages are displayed in PHP?

If the upload button appears unresponsive and no error messages are displayed in PHP, it could be due to a potential issue with the form submission or file upload process. To troubleshoot this, check if the form enctype is set to "multipart/form-data" and ensure that the file upload size limit in php.ini is not exceeded. Additionally, verify that the file upload handling code is correctly implemented and that the destination folder has the necessary write permissions. 

<form action="upload.php" method="POST" enctype="multipart/form-data">
    <input type="file" name="file">
    <input type="submit" value="Upload">
</form>

<?php
if(isset($_FILES['file'])) {
    $uploadDir = 'uploads/';
    $uploadFile = $uploadDir . basename($_FILES['file']['name']);

    if(move_uploaded_file($_FILES['file']['tmp_name'], $uploadFile)) {
        echo "File uploaded successfully.";
    } else {
        echo "File upload failed.";
    }
}
?>

Keywords

file upload PHP error handling debugging form submission

Related Questions