sub_str(, = 0, = = ();
= (
( == 0 || >= ( = + ( =
(('mb_substr' = mb_substr(, 0, , (('iconv_substr' = (, 0, ,
= (, 0,
( && != .= '...'
}
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2、获得用户的真实IP地址
![史上最全的PHP常用函数大全，不看看你就out了（还会不断更新哦！）_PHP教程]()
=
( !==
(( ((['HTTP_X_FORWARDED_FOR' = (',', ['HTTP_X_FORWARDED_FOR'
( = (
( != 'unknown' =
((['HTTP_CLIENT_IP' = ['HTTP_CLIENT_IP'
