What debugging techniques can be used to troubleshoot file upload issues in PHP scripts?

When troubleshooting file upload issues in PHP scripts, one common technique is to check the file upload settings in the php.ini file to ensure that file uploads are enabled and that the maximum file size and post size limits are set appropriately. Additionally, you can use the $_FILES superglobal array to inspect the file upload data and check for any errors or issues during the upload process. 

// Check file upload settings in php.ini
// Ensure file_uploads is set to On
// Check upload_max_filesize and post_max_size limits

// Use $_FILES superglobal to inspect file upload data
if ($_FILES['file']['error'] !== UPLOAD_ERR_OK) {
    // Handle file upload error
    echo 'File upload failed: ' . $_FILES['file']['error'];
} else {
    // Process uploaded file
    $uploadedFile = $_FILES['file']['tmp_name'];
    $destination = 'uploads/' . $_FILES['file']['name'];
    move_uploaded_file($uploadedFile, $destination);
    echo 'File uploaded successfully!';
}

Keywords

file upload debugging PHP scripts troubleshooting error types

Related Questions