PHP FILTER_VALIDATE_IP filter

Definition and usage

FILTER_VALIDATE_IP filter The filter validates the value as an IP address.

Name: "validate_ip"

ID-number: 275

Possible signs:

FILTER_FLAG_IPV4 - requires the value to be a legal IPv4 IP (such as 255.255.255.255).

FILTER_FLAG_IPV6 - requires the value to be a valid IPv6 IP (e.g. 2001:0db8:85a3:08d3:1319:8a2e:0370:7334).

FILTER_FLAG_NO_PRIV_RANGE - Requires a value not within the private range IP specified by the RFC (eg 192.168.0.1).

FILTER_FLAG_NO_RES_RANGE - Requires value not within reserved IP range. This flag accepts IPV4 and IPV6 values.

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"; }?>

The output of the code looks like this:

 IP is valid

Example 2

 <?php$ip = "2001:0db8:85a3:08d3:1319:8a2e:0370:7334";if(!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) { echo "IP is not valid"; }else { echo "IP is valid"; }?>

The output of the code looks like this:

 IP is valid