资源描述：
《php读取纯真ip数据库使用示例范文.doc》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、99••e???:?php/*[qqwry・datip2address*/classip{var$fh;//IPey3/4Y?a??l/4t3/4?+uvar$first;//uud/zi??4-dyvar$last;//X?ood，zi??-rdyvar$total;//?-rdyXtiey//ll?io一eyfunction―construet(){$this-fh=fopen(，qqwry.dat，,，rb?);//qqwry.dat??l/4t$this-getLong4();$this-ge
2、tLong4();$this-first$this-last$this—total($this-last—$this-first)/7;//??!??^dy7X?l/2u}//l/4i2eIPo?•…D?functionchecklp($ip)$arrexplode('・’，$ip);if(count($arr)!=4){Teturnfalse;}else{for($i=0;$i?a?a?????4-oa1/2eeud?php?ae?f???ipey3/4Y?a??e3/4?e??D??<2u?eld
3、?e3/4ay,/ol/4d2??l/4eld?°e4;$i++){if($arr[$i]50,$arr[$i_'255'){returnfalse;}}}returntrue;}functiongetLong4(){//?ae?little-endian土d??卩?4??X?l/2uXa〃-?a3CS??D1ey$result=unpackCVlong5,fread($this-fh,4));return$resuIt['long'];}functiongetLong3(){//?ae?little
4、-endian±a??U?3??X?l/2uXa，z"?a3Q??Dley$result=unpackCVlong，,fread($this-fh,3).chr(0));return$result['long'];}//2e?-D??Cfunctiongetlnfo($data二){$char二fread($this-fh,1);while(ord($char)!二0){//lul/4du???D??Cd?01/2de?$data.=$char;$char=fread($this-fh,1);}ret
5、urn$data;}//2e?_u???D??OfunctiongetAreaO{$byte二fread($this~fh,1);//+e?3/4X?l/2uswitch(ord($byte)){case0:$area='';break;//?/zdDu???D??<2case1://»???土〃？？？•*?dfseek($this-fh,$this-getLong3());$area=$this-getlnfo();break;case2://n???±〃？？？••fseek($this-fh,$t
6、his-getLong3());$area二$this-getlnfo();break;defauIt:$area=$this-getlnfo($byte);break;//»????〃6D土〃？？？?d}return$area;}functionip2addr($ip){if(!$this-checklp($ip)){returnfalse;}$ip=pack('N',intval(ip21ong($ip)));//?t•?2e?d$1=0;$r=$this~total;while($1=$r){$
7、m二floor(($1+$r)/2);//l/4????Dl/4??H-dyfseek($this-fh,$this-first+$m*7);$beginip二strrev(fread($this-fh,4));//?Dl/4??4-dyu??ael/4IPu??*fseek($this-fh,$this-getLong3());$endip二strrev(fread($this-fh,4));//?Dl/4??H-dyu?l/2de?IP»??・if($ip$beginip){//6?〃§u?IPD
8、?ou?Dl/4??4-oyu??ael/4IPu??•e±$r=$m-1;}else{if($ip$endip){//6?〃§u?IP，ddu?Dl/4??4-dyu?l/2de?IPU??・0土$1=$m+1;}else{//6?〃§IP?u?Dl/4??H-dyu?IP*??§?ue±$findip=$this-first+$m*7;break;}}}//2e?"lul/4dn???D??<2fseek($this-fh,$findip);$loc
