How can PHP be used to handle HTTP uploads and manage temporary data effectively?

To handle HTTP uploads and manage temporary data effectively in PHP, you can use the `$_FILES` superglobal to access the uploaded file data and move the file to a temporary directory for processing. You can then process the uploaded file as needed and move it to its final destination or delete it after use to free up server space.

// Check if file was uploaded successfully
if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {
    $tempFile = $_FILES['file']['tmp_name'];
    
    // Process the uploaded file
    // Move the file to a temporary directory for processing
    $tempDir = 'temp/';
    $finalFile = $tempDir . $_FILES['file']['name'];
    move_uploaded_file($tempFile, $finalFile);
    
    // Process the uploaded file as needed
    
    // Move the file to its final destination
    // Or delete the file after use to free up server space
    unlink($finalFile);
}