How can the use of var_dump() and error reporting functions in PHP help troubleshoot issues with file uploads in a web application?

When troubleshooting issues with file uploads in a web application, using var_dump() can help to display the contents of variables related to the file upload process, such as $_FILES array. Additionally, enabling error reporting functions like error_reporting(E_ALL) and ini_set('display_errors', 1) can help to identify any errors or warnings that may be occurring during the file upload process. 

<?php
// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Check for file upload errors
if ($_FILES['file']['error'] !== UPLOAD_ERR_OK) {
    echo 'File upload failed with error code: ' . $_FILES['file']['error'];
    exit;
}

// Display contents of $_FILES array
var_dump($_FILES);

Keywords

var_dump error reporting file uploads troubleshooting web application

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