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判断访问IP

时间:2014-07-22 14:52来源: 作者: 点击:
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判断访问IP
判断访问IP
<?php 
function getIP() { 
	if (! empty ( $_SERVER ["HTTP_CLIENT_IP"] )) { 
		$cip = $_SERVER ["HTTP_CLIENT_IP"]; 
	} else if (! empty ( $_SERVER ["HTTP_X_FORWARDED_FOR"] )) { 
		$cip = $_SERVER ["HTTP_X_FORWARDED_FOR"]; 
	} else if (! empty ( $_SERVER ["REMOTE_ADDR"] )) { 
		$cip = $_SERVER ["REMOTE_ADDR"]; 
	} else { 
		$cip = ''; 
	} 
	preg_match ( "/[\d\.]{7,15}/", $cip, $cips ); 
	$cip = isset ( $cips [0] ) ? $cips [0] : 'unknown'; 
	unset ( $cips ); 
	return $cip; 
} 

?>
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