Is it possible to determine user resolution using JavaScript in conjunction with PHP?

Yes, it is possible to determine user resolution using JavaScript in conjunction with PHP. You can use JavaScript to detect the user's resolution and then pass that information to a PHP script using AJAX or form submission. The PHP script can then process the resolution data and perform any necessary actions based on it. 

<?php
if(isset($_POST['resolution'])){
    $resolution = $_POST['resolution'];
    // Perform actions based on user resolution
    echo "User resolution is: " . $resolution;
}

?>

<script>
    var resolution = window.innerWidth + 'x' + window.innerHeight;
    var xhr = new XMLHttpRequest();
    xhr.open('POST', 'your_php_script.php', true);
    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xhr.send('resolution=' + resolution);
</script>

Keywords

JavaScript PHP user resolution screen resolution browser detection

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