邮箱正则表达式实现代码(针对php)

/
  邮箱地址正则表达式
 /
$preg = '/^(\w{1,25})@(\w{1,16})(\.(\w{1,4})){1,3}$/';
$b = 'ffgddayasdadasdf@gmialsdfsdfasd3...';
if(preg_match($preg, $b)){
    echo "匹配到了";
}else{
    echo "没有匹配到";
}