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<?php $externalContent = file_get_contents(‘http://checkip.dyndns.com/‘); preg_match(‘/Current IP Address: \[?([:.0-9a-fA-F]+)\]?/‘, $externalContent, $m); $externalIp = $m[1]; echo $externalIp;
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原文地址:http://www.cnblogs.com/johnsonshu/p/5152624.html