从HTTP_REFERER提取方案和主机 [英] Extract Scheme and Host from HTTP_REFERER

问题描述

我有$_SERVER['HTTP_REFERER']—假设它是 http://example.com/i/like/turtles.html .我该怎么做才能从字符串中仅获取http://example.com部分，并将其存储在其自己的变量中?

I have $_SERVER['HTTP_REFERER'] — pretend it is http://example.com/i/like/turtles.html. What would I need to do to get just the http://example.com part out of the string, and store it in its own variable?

推荐答案

在此示例中，最好的解决方案是使用PHP的

In this example, the best solution would be to use PHP's parse_url method. This splits up the URL into an associative array. You would then build your final value by combining the scheme with the host:

if ( $parts = parse_url( "http://example.com/i/like/turtles.html" ) ) {
    echo $parts[ "scheme" ] . "://" . $parts[ "host" ];
}

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