php的邮件验证【正则表达式】

php的邮件验证:
< ?
function checkmail($mail){
if(ereg(“^[a-zA-Z0-9_-]+@[a-zA-Z0-9]+\.[a-zA-Z]+$”,$mail)){
return 1;
} else return 0;
}
$m=”yaiba23@163.com”;
echo checkmail($m);
?>

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