After adding the judgment condition, the page will report an error and will not jump!

Question

After adding the conditions to determine whether to log in, the page reports an error and does not jump to the specified page. What should I do? Where is the problem??

Seeing this verification code reminds me of another tutorial, The verification code is always not displayed, and the background is this captcha.html address. .

Answer 1

But the problem of background verification code has not been solved yet

Answer 2

Ashamed to define user_id myself and write less e// in the function

The second function uses the Chinese input method to input the judgment from the is_null function to the exclamation point. . .

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