Thinkphp automatically verifies how to implement

Source: Internet
Author: User
How does Thinkphp implement automatic verification? When studying Yourphp system code today, we found that there is a sentence on the registration page: HTMLcode & lt; inputtype = & quot; text & quot; id = & quot; username & quot; name = & quot; username & quot; class = & quot; in Thinkphp how to implement automatic verification?
When studying the Yourphp system code today, we found that there is a sentence on the registration page:
HTML code
   


Through this sentence, thinkphp can be automatically verified. for example, if it is less than five characters long, he reminds me how to implement this function?

------ Solution --------------------
First look at his development manual
Analyze his code again
------ Solution --------------------
Verify it through js. check the code on the current page to find. js.
------ Solution --------------------
Verification in the model
------ Solution --------------------
Check whether this is a front-end verification or background verification.

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