How to create a UA library in PHP that randomly selects a UA each time?

To create a PHP UA library, you can use an array to store various user agent strings. Here is a simple example:

$uas = [
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3",
    "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; AS; rv:11.0) like Gecko",
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36",
    // 添加更多的用户代理字符串...
];

Then, you can use PHP. array_rand The function randomly selects a user agent string from an array. For example:

$random_ua = $uas[array_rand($uas)];

This function returns a randomly selected user agent string, which can be used within your program.