how to check the page is loaded in mobile or browser using Apex Class

its achievable with the help of “User-Agent” header properties like below:

String userAgent = ApexPages.currentPage().getHeaders().get('User-Agent');
if (userAgent.contains('iPhone')) {
    return 'iPhone-Safari';
} else if (userAgent.contains('iPad')) {
    return 'iPhone-Safari';
} else if (userAgent.contains('Salesforce')) {
    return 'Salesforce';
} else if (userAgent.contains('BlackBerry')) {
    return 'BlackBerry';
} else {    
    return 'other';
}

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