全面測試email的有效性 -pc6资讯

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全面測試email的有效性 时间：2004/11/7 3:23:00来源：本站整理作者：蓝点我要评论(0): 一般我們常希望拜訪你的網站的朋友能留下Email

但是很多人都會隨便打,造成管理員的困擾,

以下這個class可以線上檢查Email是否是有效的Email(存不存在)

class CEmail {

var $email_regular_expression="^([a-z0-9_]|\-|\.)+@(([a-z0-9_]|\-)+\.)+[a-z]{2,4}$";

var $timeout=0;

var $localhost="";

var $localuser="";

Function GetLine($connection)

{

for($line="";;)

{

if(feof($connection))

return(0);

$line.=fgets($connection,100);

$length=strlen($line);

if($length>=2

&& substr($line,$length-2,2)=="rn")

return(substr($line,0,$length-2));

}

}

Function PutLine($connection,$line)

{

return(fputs($connection,"$linern"));

}

Function VerifyRule($email)

{

return(eregi($this->email_regular_expression,$email)!=0);

}

Function ValidateEmailHost($email,$hosts=0)

{

if(!$this->VerifyRule($email))

return(0);

$user=strtok($email,"@");

$domain=strtok("");

if(GetMXRR($domain,&$hosts,&$weights))

{

$mxhosts=array();

for($host=0;$host
$mxhosts[$weights[$host]]=$hosts[$host];

KSort($mxhosts);

for(Reset($mxhosts),$host=0;$host
$hosts[$host]=$mxhosts[Key($mxhosts)];

}

else

{

$hosts=array();

if(strcmp(@gethostbyname($domain),$domain)!=0)

$hosts[]=$domain;

}

return(count($hosts)!=0);

}

Function VerifyResultLines($connection,$code)

{

while(($line=$this->GetLine($connection)))

{

if(!strcmp(strtok($line," "),$code))

return(1);

if(strcmp(strtok($line,"-"),$code))

return(0);

}

return(-1);

}

Function VerifyOnline($email)

{

if(!$this->ValidateEmailHost($email,&$hosts))

return(0);

if(!strcmp($localhost=$this->localhost,"")

&& !strcmp($localhost=getenv("SERVER_NAME"),"")

&& !strcmp($localhost=getenv("HOST"),""))

$localhost="localhost";

if(!strcmp($localuser=$this->localuser,"")

&& !strcmp($localuser=getenv("USERNAME"),"")

&& !strcmp($localuser=getenv("USER"),""))

$localuser="root";

for($host=0;$host
{

if(($connection=($this->timeout ? fsockopen($hosts[$host],25,&$errno,&$error,$this->timeout) : fsockopen($hosts[$host],25))))

{

if($this->VerifyResultLines($connection,"220")>0

&& $this->PutLine($connection,"HELO $localhost")

&& $this->VerifyResultLines($connection,"250")>0

&& $this->PutLine($connection,"MAIL FROM: <$localuser@$localhost>")

&& $this->VerifyResultLines($connection,"250")>0

&& $this->PutLine($connection,"RCPT TO: <$email>")

&& ($result=$this->VerifyResultLines($connection,"250"))>=0)

{

fclose($connection);

return($result);

}

fclose($connection);

}

}

return(-1);

}

function Verify($email,$type=0) {

    if($type==0) return $this->VerifyRule($email) ;

    else     return $this->VerifyOnline($email) ;

}

};





?>

用法:

$m=new CEmail;

//僅檢查語法

if($m->Verify("jerry@mail.jerry.com.tw",0)) echo "有效";

else echo "無效";

//線上檢查是否真的有該Email

if($m->Verify("jerry@mail.jerry.com.tw",1)) echo "有效";

else echo "無效";

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