How can the $_FILES array be properly structured to avoid errors in file upload scripts?

When working with file uploads in PHP, it is important to properly structure the $_FILES array to avoid errors in file upload scripts. The key to this is ensuring that the form containing the file input field has the correct enctype attribute set to "multipart/form-data". This allows the file data to be properly encoded and sent as part of the HTTP request. Additionally, make sure that the file input field has a name attribute that corresponds to the key in the $_FILES array where the file data will be stored. 

<form method="POST" enctype="multipart/form-data">
    <input type="file" name="file_upload">
    <input type="submit" value="Upload File">
</form>

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_FILES['file_upload'])) {
        $file = $_FILES['file_upload'];
        // Process the uploaded file here
    } else {
        echo "No file uploaded";
    }
}
?>

Keywords

$_FILES array file upload errors structure PHP

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