How to verify email and IP address in php-PHP Tutorial-php.cn

How to verify email and IP address in php

墨辰丷

Release： 2023-03-30 08:04:01

Original

1437 people have browsed it

This article mainly introduces the method of verifying email and IP address in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

The example code is as follows:

public static function isEmail( $email ) 
{ 
return preg_match("/^([a-z0-9]*[-_＼.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[＼.][a-z]{2,4}([＼.][a-z]{2})?$/i" , $email ); 
} 
public static function isNumber( $num ) 
{ 
return is_numeric( $num ); 
} 
public static function isUrl( $url , $preg = false ) 
{ 
if( $preg ) 
{ 
$status = preg_match ( "/^([^:＼/＼/])+＼:＼/＼/[＼w-]+＼.[＼w-.＼?＼/]+$/" , $url ); 
} 
else 
{ 
$status = filter_var( $url , FILTER_VALIDATE_URL ); 
} 
return $status; 
}

Copy after login

Supplement:Use PHP’s built-in functions to operate.

php verification Email, the code is as follows:

$email = &#39;fengdingbo@gmail.com&#39;;             
$result = filter_var($email, FILTER_VALIDATE_EMAIL); 
var_dump($result); // string(20) "fengdingbo@gmail.com"

Copy after login

php verification url address, the code is as follows:

$url = "http://www.jb51.net"; 
$result = filter_var($url, FILTER_VALIDATE_URL); 
var_dump($result); // string(25) "http://www.jb51.net"

Copy after login

php verification ip address, the code is as follows:

$url = "192.168.1.110"; 
$result = filter_var($url, FILTER_VALIDATE_IP); 
var_dump($result); // string(13) "192.168.1.110" 
// 该方法也可以用来验证ipv6。 
$url = "2001:DB8:2de::e13";              
$result = filter_var($url, FILTER_VALIDATE_IP); 
var_dump($result); // string(17) "2001:DB8:2de::e13"

Copy after login

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

Related recommendations:

PHP's method of converting XML into an array and example code

PHP's multiple methods of reading large files Detailed explanation and examples

php HTML method and examples of submitting form without refreshing

The above is the detailed content of How to verify email and IP address in php. For more information, please follow other related articles on the PHP Chinese website!