What does mime type mean in php

In PHP, mime type is a multi-purpose Internet mail extension type. It is an Intel standard for describing message content types. It is designed to attach multimedia data when sending emails. PHP can use "mime_content_type ()" function to get the mime type of the file.

The operating environment of this article: Windows 10 system, PHP version 7.1, Dell G3 computer.

What does mime type mean in php

1. Definition of MIME

MIME (Multipurpose Internet Mail Extensions) multipurpose Internet mail extension type. It is an Internet standard for describing message content types

2. The original purpose of MIME design

MIME means Multifunctional Internet Mail Extensions. The original purpose of its design is to Attach multimedia data when sending an e-mail so that the mail client can process it according to its type. However, when it is supported by the HTTP protocol, its significance becomes even more significant. It makes HTTP transfer not only ordinary text, but also rich and colorful.

3.MIME file format

Each MIME type consists of two parts, a large category and a type.

For example:

Hypertext Markup Language text.html text/html

Normal text.txt text/plain

PDF document.pdf application/pdf

PNG image.png image/png

TAR file.tar application/x-tar

4.PHP gets the MIME type of the file

You can use the built-in function mime_content_type() function in PHP to obtain the mime type of the file.

Basic syntax:

string mime_content_type($file)

Parameters: The me_content_type() function accepts a single parameter $file, which specifies the file path of the MIME details to be found .

Return value: The me_content_type() function returns the MIME content type; if it fails, it will return false.

Example:

Let’s use the me_content_type() function to get the mime type of these files (the files are in the demo directory):

Implementation code:

<?php
# 输出不同类型文件的结果
echo mime_content_type(&#39;demo/1.docx&#39;) . "</br>";
echo mime_content_type(&#39;demo/1.html&#39;) . "</br>";
echo mime_content_type(&#39;demo/1.jpg&#39;) . "</br>";
echo mime_content_type(&#39;demo/1.pdf&#39;) . "</br>";
echo mime_content_type(&#39;demo/1.txt&#39;) . "</br>";
echo mime_content_type(&#39;demo/1.zip&#39;) . "</br>";
 ?>

Output result:

inode/x-empty

inode/x-empty

image/jpeg

application/pdf

inode/x-empty

application/zip

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