PHP自带方法验证邮箱是否存在，php自带验证邮箱_PHP教程

$email = "lastchiliarch@163.com";
 
var_dump(filter_var($email, FILTER_VALIDATE_EMAIL));
 
 
$email = "asb";
var_dump(filter_var($email, FILTER_VALIDATE_EMAIL));
 
$email = "1@a.com";
var_dump(filter_var($email, FILTER_VALIDATE_EMAIL));

string(21) "lastchiliarch@163.com"
bool(false)
string(7) 1@a.com

$email = "lastchiliarch@163.com";
  var_dump(checkdnsrr(array_pop(explode("@",$email)),"MX"));
  $email = "1@a.com";
  var_dump(checkdnsrr(array_pop(explode("@",$email)),"MX"));

  bool(true)
  bool(false)

$email_arr = array("lastchiliarch@163.com", "1@a.com");
  foreach($email_arr as $email) {
    if (filter_var($email) === false) {
      echo "invalid email: $email \n";
      continue;
    }
 
    if(checkdnsrr(array_pop(explode("@",$email)),"MX") === false) {
      echo "invalid email: $email \n";
      continue;
    }
  }
 

invalid email: 1@a.com

<&#63;php

var_dump(filter_var('bob@example.com', FILTER_VALIDATE_EMAIL));

var_dump(filter_var('http://example.com', FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED));

&#63;>

string(15) "bob@example.com"
bool(false)