My previous verification was OK, but when I finally executed it, after typing the executed if statement, connecting to the database, and refreshing the page again, "page error" appeared. I verified the code repeatedly, and I also tried to connect to the database using other methods. For example, it is no problem to build a function and then connect it to read data. May I ask how is this going? How to solve it?

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There was a problem with the final execution.

My previous verification was OK. When I finished the execution, I finished the if statement and connected to the database. When I refreshed the page again, "page error" appeared. I verified the code repeatedly. I also tried using other databases. There is no problem in connecting by creating a function and then connecting it to read data. May I ask how is this going? How to solve it?

phpcn_u177762682 days ago1324

reply all(2)I'll reply

phpcn_u177762017-09-01 13:43:27

屏幕快照 2017-08-31 下午10.39.23.png

This is the execution code

Then debug with a breakpoint here, debug step by step, and then check if there is a return value in netword. This should be where there is an error.

— ringa_lee · 2017-09-01 15:34:14

How to debug this execution code? I just learned php and don't understand it very well. Can you give an example?

— phpcn_u17776 · 2017-09-01 16:23:30

I think Teacher Zhu uses alert() to display the value. is that so? How should it be written?

— phpcn_u17776 · 2017-09-01 16:25:34

Yes

— ringa_lee · 2017-09-02 08:58:18

ringa_lee2017-08-31 15:05:18

Enable debug and see what the error message is and the number of lines where the error is reported.

This problem has been solved, but after entering the login interface, why does nothing happen after entering the account number and password and clicking login?

— phpcn_u17776 · 2017-08-31 15:20:50

Reply to ringa_lee: I can give you a screenshot of the code

— phpcn_u17776 · 2017-09-01 10:26:05

Reply to phpcn_u17776: Hello, how did you solve this problem jquery.min.js:5 POST http://www.mdoor.com/index/user/checklogin.html 500 (Internal Server Error)

— YY · 2017-10-16 15:40:24

I just started learning PHP and I don’t quite understand it. I looked at the return value of network and it is checklogin.html. But I don’t have the checklogin.html file.

— phpcn_u17776 · 2017-08-31 16:15:48

Is it 500, internal server error? How should this be solved?

— phpcn_u17776 · 2017-08-31 16:29:42

Still not sure what's going on, I put the return statement under the verification, and a true will appear on the login interface, and the network is 200, no problem. But if you add the last execution statement, there will be a problem, it will become 500. It means that the checlogin method can be found earlier. But when executing the statement, I compared it with the teacher's code many times and found no problem. How is this going. And if I entered the correct account and password earlier, it would return true.

— phpcn_u17776 · 2017-09-01 05:02:46

Okay, are you on QQ? which one is you?

— phpcn_u17776 · 2017-09-01 08:54:24

I just joined the 7 and 5 group

— phpcn_u17776 · 2017-09-01 08:54:56

I can give you a screenshot of the code

— phpcn_u17776 · 2017-09-01 10:26:42

/Users/yuanjiezhang/Desktop/Screenshot 2017-08-31 10.39.23.png

— phpcn_u17776 · 2017-09-01 13:41:02

The above answer is a screenshot of my execution code

— phpcn_u17776 · 2017-09-01 13:44:26

You should use AJAX to log in. Check the network to see what is returned, and then go to the program to debug with breakpoints.

— ringa_lee · 2017-08-31 15:41:43

Yes, the error is reported because there is no checklogin method. Then you can use the checklogin method to verify the login.

— ringa_lee · 2017-08-31 18:12:20

There must be something wrong with the executed program. Post the code and take a look.

— ringa_lee · 2017-09-01 08:53:22

Just post the screenshot under the reply, you can see it

— ringa_lee · 2017-09-01 13:38:15

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