What are the key elements in the $_SERVER array that can help identify the subdomain in PHP?

To identify the subdomain in PHP, you can use the 'HTTP_HOST' element in the $_SERVER array. This element contains the hostname of the current request, which includes the subdomain if it exists. By parsing this element, you can extract the subdomain and use it as needed in your PHP code. 

$subdomain = explode('.', $_SERVER['HTTP_HOST'])[0];
echo $subdomain;

Keywords

$_SERVER array subdomain identification PHP

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