php non-specified URL cannot be accessed

php non-specified URL cannot be accessed

1. First define an array $allow_url to store the domain name whitelist. That is, the address that can access this website;

2. Then get $_SERVER['HTTP_REFERER'];

3. Then determine whether the visitor is in the whitelist, and then Run access, otherwise not allowed.

$allow_url = [
    0 => 'eva.com',
    1 => 'localhost',
];

$refer = $_SERVER['HTTP_REFERER'];

$pattern = '/^(http|https):\/\/?([^\/]+)/i';
preg_match($pattern, $refer, $match);

$demain_name = $match[2];
if (in_array($demain_name, $allow_url)) {
    echo 'ok';
}else{
    die('不允许的域名');
}

For more PHP related knowledge, please visit PHP Chinese website!

The above is the detailed content of php non-specified URL cannot be accessed. For more information, please follow other related articles on the PHP Chinese website!