Explain how thinkphp implements page refresh

In web development, we often need to refresh the page to obtain the latest data or update the view of the page. How to refresh the page after using the thinkphp framework? This article will explain this issue in detail.

1. The basic meaning of page refresh

In the process of website development, page refresh refers to reloading the page based on the current page. After refreshing, re-obtain the data and update the page display. Page refresh is generally divided into two categories: front-end refresh and back-end refresh.

Front-end refresh generally implements automatic or manual page refresh, which can be achieved using front-end technologies such as JavaScript, HTML, and CSS. The back-end refresh is generally completed on the server side, which requires writing back-end scripts or using ajax and other technologies.

2. Implementation method of front-end refresh in thinkphp

It is quite simple to implement front-end refresh in thinkphp. Partial refresh can be achieved using jQuery's load() method.

<script type="text/javascript">
$(document).ready(function() {
    $("#refreshBtn").click(function(){
        $("#data").load(location.href+" #data>*","");
    });
});
</script>

Among them, refreshBtn is the ID of the refresh button, and data is the ID of the area that needs to be refreshed. After clicking the refresh button, jQuery's load() method is used to re-obtain the content of the data area in the current URL and display it on the page, thereby refreshing the page.

3. Implementation method of backend refresh in thinkphp

To implement backend refresh in thinkphp, you can use two methods:

1. Use the native PHP header( )Function

Redirects the page to the current page through the header() function to refresh the page.

header("Location:".$_SERVER['REQUEST_URI']);

$_SERVER['REQUEST_URI'] is used here to obtain the url path of the current request, thereby realizing page redirection and page refresh.

2. Use the redirect() function encapsulated by thinkphp

The redirect() function is a page jump function encapsulated by thinkphp, which can realize page redirection and page parameter transfer.

return $this->redirect($_SERVER['REQUEST_URI']);

The redirect() function encapsulated by thinkphp is directly called here to refresh the page. At the same time, you can also implement the transfer of params parameters as needed to process some specific business logic.

4. Frequently Asked Questions and Solutions

1. Double submission problem occurs after refreshing

The main reason for this problem is that the user is submitting the form , the browser stores the form data in the cache, and when the user refreshes the page, the browser will automatically submit the form data repeatedly.

Solution: You can use Cookie or Session to implement Token verification of the form. For specific methods, please refer to CSRF Attack and Defense.

2. ajax refresh page is invalid

The reason for this problem may be that the ajax caching mechanism prevents the page from being refreshed.

Solution: Add the cache: false attribute to the ajax request to disable ajax caching.

3. Conclusion

This article mainly introduces the method of page refresh under the thinkphp framework and solves common problems. Whether it is front-end refresh or back-end refresh, the effect of automatic page refresh can be achieved. Therefore, during the development process, choose the appropriate implementation method according to your needs.

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