How to verify email and IP address in php

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; 
}

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

php verification Email, the code is as follows:

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

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"

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"

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

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