038 PHP中强大的filter_var

<?php # coding: utf-8

$ip = '1.2.3.4';

if(filter_var($ip, FILTER_VALIDATE_IP)) {

echo $ip." is valid IP <br>";

} else {

echo $ip." is not valid IP. <br>";

}

输出：1.2.3.4 is valid IP 

$ip = '311.2.3.4';

//判断是否是合法的IPv4 IP地址

if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {

echo "Second paragraph...<br>";

echo $ip." is valid IP <br>";

} else {

echo $ip." is not valid IP <br>";

}

输出：311.2.3.4 is not valid IP 

$ip = '10.1.1.1'; //192.168.1.1 这类的一样...

//判断是否是合法的公共IPv4地址

if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE)) {

echo $ip." is public IPv4 <br>";

} else {

echo $ip." is not public IPv4 <br>";

}

输出：10.1.1.1 is not public IPv4 

$ip = 'FF01::101';

//判断是否是合法的IPv6地址

if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE)) {

echo $ip." is valid IPv6 <br>";

} else {

echo $ip." is not valid IPv6 <br>";

}

输出：FF01::101 is valid IPv6 

$email = "a@bc.cn";

//判断是否是public IPv4 IP或者是合法的Public IPv6 IP地址

if(filter_var($email, FILTER_VALIDATE_EMAIL)) {

echo $email." is a valid email. <br>";

} else {

echo $email." is not valid email. <br>";

}

输出：a@bc.cn is a valid email. 

$url = "http://www.ssbao.shop";

if(filter_var($url, FILTER_VALIDATE_URL)) {

echo $url." is a valid url. <br>";

} else {

echo $url." is not valid url. <br>";

}

输出：http://www.ssbao.shop is a valid url. 

$mac = "00:11:22:EE:ff:aa";

if(filter_var($mac, FILTER_VALIDATE_MAC)) {

echo $mac." is a valid mac address. <br>";

} else {

echo $mac." is not valid mac address. <br>";

}

输出：00:11:22:EE:ff:aa is a valid mac address. 

php获取客户端IP地址的几种方法

https://blog.youkuaiyun.com/shaobingj126/article/details/17025757

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