How To Check Valid Ip Address Using PHP Function Example

How to check if the given IP address is valid or not?; In this post, I will teach you how to validate IP address for the incoming request. This is too much important while we collect sensitive data from the HTTP incoming request.

For check valid IP address we will take help of PHP function filter_var(). This function will return a boolean datatype. If the given IP address is valid then it will return true else this function will return false.

This IP validate function will check in a different way like a given string has "." available and also check with valid digits and base on that it will return the result.

Valid IP check using PHP given PHP function we must need to pass two arguments. In the first argument, we will pass the IP address string, and the second argument we will pass the type of check with the given IP address. So lets with an example.

How To Check Given URL Is Valid Or Not PHP Function Example

<?php

$ip = "127.0.0.1";

if (!filter_var($ip, FILTER_VALIDATE_IP) === false) {

    echo("$ip is a valid IP address"); // TRUE
} else {

    echo("$ip is not a valid IP address");
}

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