Can PHP access client-side data such as screen resolution directly?

PHP is a server-side language and cannot directly access client-side data such as screen resolution. However, you can use JavaScript to get the screen resolution on the client-side and pass that information to the server-side PHP script using AJAX or form submission. 

// This is an example of how you can pass screen resolution from client-side to server-side PHP using AJAX

// JavaScript code to get screen resolution and pass it to PHP
<script>
    var screenWidth = window.screen.width;
    var screenHeight = window.screen.height;

    var xhr = new XMLHttpRequest();
    xhr.open('POST', 'update_resolution.php', true);
    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xhr.send('width=' + screenWidth + '&height=' + screenHeight);
</script>

// PHP code in update_resolution.php to receive screen resolution data
<?php
if(isset($_POST['width']) && isset($_POST['height'])){
    $width = $_POST['width'];
    $height = $_POST['height'];
    
    // You can now use $width and $height in your PHP script
}
?>

Keywords

PHP client-side data screen resolution JavaScript window object

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