For the session and verification code, I can use the verification code in thinkphp (the verification code is saved to the session) & nbsp; and then output the md5 value of the verification code & nbsp; when the output value is missing, the md5 value of the verification code output after the web page is refreshed is the previous one, so that each output is the last value. Next, check the session and verification code.
I can use the verification code in thinkphp (the verification code is saved to the session)
Then output the md5 value of the verification code.
When the output value is missing, the md5 value of the verification code output after the webpage is refreshed is the previous one.
Under solution
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Is the verification code an image?
When the browser obtains the page, the server has not yet produced the latest verification code ......, What you are talking about is reasonable.
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