How reliable is the use of systeminfo to bind a script to a PC in PHP?

Using systeminfo to bind a script to a PC in PHP may not be the most reliable method as it relies on system-specific information that can vary between different machines. A more reliable approach would be to use a combination of unique identifiers such as MAC address, IP address, or a generated UUID to bind the script to a specific PC.

// Generate a unique identifier for the PC
$unique_id = md5(uniqid(rand(), true));

// Store the unique identifier in a session or database for future reference
$_SESSION['pc_identifier'] = $unique_id;

// Check if the PC identifier matches before executing the script
if ($_SESSION['pc_identifier'] == $unique_id) {
    // Proceed with script execution
} else {
    // Display an error message or redirect to another page
    echo "Unauthorized access";
}