PHP FILTER_VALIDATE_IP ການກວດກາ IP

PHP Filter Function

Definition and Usage

FILTER_VALIDATE_IP filter validates the value as an IP.

  • Name: "validate_ip"
  • ID-number: 275

Possible flags:

  • FILTER_FLAG_IPV4 - Requires the value is a valid IPv4 IP (like 255.255.255.255)
  • FILTER_FLAG_IPV6 - Requires the value is a valid IPv6 IP (like 2001:0db8:85a3:08d3:1319:8a2e:0370:7334)
  • FILTER_FLAG_NO_PRIV_RANGE - Requires the value is an RFC-specified private IP (like 192.168.0.1)
  • FILTER_FLAG_NO_RES_RANGE - Requires the value is not within the reserved IP range. This flag accepts IPV4 and IPV6 values.

Example

Example 1

<?php
$ip = "192.168.0.1";
if(!filter_var($ip, FILTER_VALIDATE_IP))
 
 echo "IP is not valid";
 
else
 
 echo "IP is valid";
 


IP is valid

Example 2

<?php

if(!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6))
 
 echo "IP is not valid";
 
else
 
 echo "IP is valid";
 


IP is valid

PHP Filter Function