Javascript/Typescript

Use TypeScript or JavaScript for this function.

Methods through front-end are completely insecure. It is recommended to use back-end for high development and security standards.

async function checkLicense() {
    try {
        const response = await fetch("https://license.example.com/api.php?secret={$secret}&type=license&key={$key}&scope={$scope}");
        const data = await response.json();

        if (data.valid) {
            // License is valid
            console.log('Success');
        } else {
            // License is invalid
            console.log('Error... Access denied!');
            if (data.message) {
                console.log('Type: ' + data.message);
            }
        }
    } catch (error) {
        console.error('Error fetching license:', error);
    }
}

checkLicense();

Need for changes to ensure proper functionality.

Fill in the necessary fields.

{$secret} = The secret key of the site to which you will allow access, found in config.php

{$key} = A generated license key.

{$scope} = If the use of scope in the license is mandatory, enter the SCOPE set in the key.

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Done.

Regards, juan panizzino 📀