How to install fileinfo extension in php7.2

In PHP development, it is often necessary to use fileinfo to perform type detection, encoding detection and other operations on uploaded files, which requires the installation of the fileinfo extension. In PHP 7.2 version, a new method is required to install the extension. This article explains how to install the fileinfo extension in PHP 7.2.

1. Preparation

Before starting the installation, we need to know a few things:

• Make sure your PHP version is 7.2 and above. You can check it by entering the following command in the terminal:

php -v

If the version is lower than 7.2, please upgrade PHP yourself.

• Make sure you have installed PHP development tools and GCC.

In Linux, you can install it with the following command:

sudo apt-get install phpize gcc

In MacOS, you can use Homebrew to install it:

brew install autoconf
brew install automake

• Make sure you have enabled the fileinfo extension in php.ini. In most cases, this is enabled by default. You can check it with the following command:

php -i | grep fileinfo

If some information about the fileinfo extension is output, it means that the extension has been enabled.

2. Installation process

Now the real installation process begins.

• Download the php7.2 source code package.

  You can download the latest PHP7.2 source code package on the official website (https://www.php.net/downloads.php).

• Unzip the source code package.

Use the following command to decompress:

tar xvf php-7.2.0.tar.gz

Then enter the decompressed directory:

cd php-7.2.0

• Enter the ext directory.

cd ext/fileinfo

• Run phpize.

phpize

If the prompt cannot find the phpize command, you need to install the php development tools.

• Run ./configure.

./configure

• Compile.

make

• Installation.

sudo make install

At this point, the fileinfo extension has been successfully installed into your PHP 7.2 environment.

3. Test results

In order to ensure the installation is successful, we can test it through the following command:

php -r 'echo finfo_file(finfo_open(FILEINFO_MIME_TYPE), "test.jpg") . "\n";'

where "test.jpg" is a The name of the file that exists in the current directory, you can replace it with the name of the file you want to test.

If the MIME type of the file is output, the installation is successful.

4. Summary

It is not difficult to install the fileinfo extension, just follow the steps above. However, it should be noted that each step requires corresponding prerequisites, so before starting the installation, you need to carefully read the preparations mentioned in this article. I hope this article helps you get better at PHP development.

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