php验证用户输入的邮箱有效性和正确性
- WBOYOriginal
- 2016-06-13 11:33:531603browse
function validate_email($email){
$exp="^[a-z'0-9]+([._-][a-z'0-9]+)*@([a-z0-9]+([._-][a-z0-9]+))+$";
if(eregi($exp,$email)){ //先用正则表达式验证email格式的有效性
if(checkdnsrr(array_pop(explode("@",$email)),"MX")){//再用checkdnsrr验证email的域名部分的有效性
return true;
}else{
return false;
}
}else{
return false;
}
}
注意：checkdnsrr函数在win主机上是无效的!下面是国外某程序员提出的一种解决办法，另外写了个函数代替checkdnsrr函数：
function myCheckDNSRR($hostName, $recType=''){
if(!emptyempty($hostName)){
if( $recType=='' ) $recType="MX";
exec("nslookup -type=$recType $hostName", $result);
foreach($result as $line){
if(eregi("^$hostName",$line)){
return true;
}
}
return false;
}
return false;
}
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