Is IPAdress valid

Checks if a IP adress has a valid format

// Sorry, currently I did not make a routine for IPv6,
// but I'm sure you find one at: http://regexlib.com/
 
function IsIPValid($ip){
 
    if (preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/', $ip)){
        return true;
    }
 
    return false;
}
Snippet information

Author:
Jonas John

License:
Public Domain

Language:
PHP

Created:
05/17/2006

Updated:
05/17/2006

Tags:
, 



// examples:
 
var_dump(IsIPValid('192.168.100.1'));
// => bool(true)
 
var_dump(IsIPValid('192...1'));
// => bool(false)
 
var_dump(IsIPValid('127001'));
// => bool(false)
 
var_dump(IsIPValid('127.0.0.1'));
// => bool(true)

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