PHP PHP：服务器变量列表
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//Information about the Server we're on
echo "SERVER_NAME: " . $_SERVER['SERVER_NAME'] . "<br />";
echo "SERVER_ADDR: " . $_SERVER['SERVER_ADDR'] . "<br />";
echo "SERVER_PORT: " . $_SERVER['SERVER_PORT'] . "<br />";
echo "<br /><br />";
//Where are all the files located
echo "DOCUMENT_ROOT: " . $_SERVER['DOCUMENT_ROOT'] . "<br />";
//Path on the URL Address bar
echo "PHP_SELF: " . $_SERVER['PHP_SELF'] . "<br />";
//Path on the filesystem
echo "SCRIPT_FILENAME: " . $_SERVER['SCRIPT_FILENAME'] . "<br />";
//Request details
echo "REMOTE_ADDR: " . $_SERVER['REMOTE_ADDR'] . "<br />";
echo "REMOTE_Port: " . $_SERVER['REMOTE_PORT'] . "<br />";
echo "REQUEST_URI: " . $_SERVER['REQUEST_URI'] . "<br />";
echo "QUERY_STRING: " . $_SERVER['QUERY_STRING'] . "<br />";
echo "REMOTE_METHOD: " . $_SERVER['REQUEST_METHOD'] . "<br />";
echo "REMOTE_TIME: " . $_SERVER['REQUEST_TIME'] . "<br />";
//Who referred them to our website (YAHOO? GOOGLE?)
echo "HTTP_REFERER: " . $_SERVER['HTTP_REFERER'] . "<br />";
//Statistics
echo "HTTP_USER_AGENT: " . $_SERVER['HTTP_USER_AGENT'] . "<br />";
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