How can the differences between $_SERVER['SERVER_NAME'] and $_SERVER['HTTP_HOST'] be explained and utilized effectively in PHP?

The difference between $_SERVER['SERVER_NAME'] and $_SERVER['HTTP_HOST'] lies in how they are populated. $_SERVER['SERVER_NAME'] typically contains the server name specified in the configuration file, while $_SERVER['HTTP_HOST'] contains the host name provided by the client in the HTTP request. To utilize them effectively in PHP, it's important to understand their differences and use them accordingly based on the specific use case. 

// Utilizing $_SERVER['SERVER_NAME']
$serverName = $_SERVER['SERVER_NAME'];
echo "Server Name: $serverName";

// Utilizing $_SERVER['HTTP_HOST']
$httpHost = $_SERVER['HTTP_HOST'];
echo "HTTP Host: $httpHost";

Keywords

$_SERVER SERVER_NAME HTTP_HOST differences utilization

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