html delete file

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Release： 2023-05-15 17:55:38

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Speaking of HTML deleting files, we need to first understand what HTML is.

HTML, or Hypertext Markup Language, is a standard markup language used to create web pages and other web applications. It is used to describe the structure and content of a document, contains various text and images, and can link to other web pages or resources.

When we upload files on the web page, we also need a function to delete the file so that the file can be deleted if it is not needed or uploaded incorrectly. Next, we'll discuss ways to implement file deletion in HTML.

First of all, what we need to understand is that HTML itself does not have a built-in function to delete files. But we can use some other technologies and languages to achieve it, such as server-side scripting languages such as JavaScript and PHP.

In JavaScript, we can use theelement to upload files, and use the

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The above code defines anelement, and thedeleteFile()function is triggered by clicking the button to delete the selection. document. This function takes the file name selected in theelement and removes it by modifying itsvaluevalue.

When we upload a file, the uploaded content needs to be stored on the server, such as using PHP to store the file. Therefore, we can use PHP’sunlink()function to delete files on the server. The following is a PHP sample code to delete a file on the server:

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This code uses theunlink()function to delete the specified file. If the file is deleted successfully, the function will returntrue, otherwise it will returnfalse.

In general, implementing the file deletion function in HTML code requires the cooperation of other technologies and languages. Files on the front end can be deleted through JavaScript, and files on the backend server can be deleted through PHP. In this way, we can easily implement the function of deleting files.

The above is the detailed content of html delete file. For more information, please follow other related articles on the PHP Chinese website!

source：php.cn

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