？ Number dynamically to get the value, please instruct. Thanks a lot

？ Number dynamically to get the value, please instruct. Thank you
Now I want to make a page, some of the data on the page I have modified, I want to click on the next page when I saved up,

Specific as follows:
I have a text box value of: 123
I want to click on the next page to get this 123
So the href of the hyperlink is:? Ep=123

The question is, how do I get the value of this text box now?

If I change the value in the text box to 456
When I click on the next page, the link should be:? ep=456

PHP contact soon, please guide. Thank you.

------Solution--------------------
You can use JS processing:

HTML Code

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