What are some common challenges faced when using browser detection in PHP for frontend development?

One common challenge when using browser detection in PHP for frontend development is the unreliability of user-agent strings, as they can be easily manipulated or spoofed. To overcome this challenge, it is recommended to use feature detection instead of browser detection to determine the capabilities of the user's browser. 

<?php
// Feature detection example
if (function_exists('curl_init')) {
    // Code to handle browsers that support cURL
} else {
    // Code to handle browsers that do not support cURL
}
?>

Keywords

User-Agent $_SERVER Regular Expressions Mobile detection Cross-browser compatibility

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