What are the best practices for managing and handling temporary files in PHP applications to prevent data loss or unauthorized access?

When working with temporary files in PHP applications, it is important to follow best practices to prevent data loss or unauthorized access. One way to do this is by properly managing the creation, usage, and deletion of temporary files. This can include setting appropriate file permissions, using unique file names, and securely storing sensitive data.

// Create a temporary file with a unique name
$tempFile = tempnam(sys_get_temp_dir(), 'prefix');

// Write data to the temporary file
file_put_contents($tempFile, $data);

// Read data from the temporary file
$data = file_get_contents($tempFile);

// Delete the temporary file when no longer needed
unlink($tempFile);