Web Crawler-how to crawl a web page's verification code using PHP

{Code...} does not need to be cracked. I think it is difficult to click it to return its image to get its image.

After clicking

I think it's hard to crack it.
How to click to return its image to get its image

Reply content:

After clicking

I think it's hard to crack it.
How to click to return its image to get its image

You can use firebug to view the request address for obtaining the verification code. In general, ajax is possible. If you only get an image, you only need to click the link to obtain the verification code.

After clicking it, an ajax will be triggered. Capture the packet and request the url directly.

You can directly obtain the URL triggered after the click. As for the t = XXX parameter you mentioned, you can check the code on the page. Generally, the random number or the current timestamp is used on the Verification Code (to prevent being cached, generally, requests with different parameters are not cached. If the request is dynamically generated by the server, write more requests to obtain parameters.