Why does Composer require the FileInfo extension to install Intervention/Image?

Composer Dependency Installation Requires FileInfo Extension

Upon attempting to install the Intervention/Image package via Composer, you may encounter the error message "requires ext-fileinfo." This indicates the absence of the PHP FileInfo extension, a requirement for the package to function properly.

Composer Configuration

Contrary to the error message, there is no need to modify your composer.json file to resolve this issue. The problem lies with the PHP FileInfo extension.

Enabling the FileInfo Extension

The FileInfo PHP extension is typically installed by default in PHP versions 5.3.0 and higher. For earlier versions, the discontinued PECL extension was used. To enable the FileInfo extension, you need to edit your php.ini file and uncomment the following line:

extension=php_fileinfo.dll

Locating the php.ini File

The location of the php.ini file can be determined by running the following command in a terminal:

php --ini

Look for the section labeled "Loaded Configuration File" to find the path to your php.ini file. Note that the PHP CLI may utilize a different php.ini file than the web server, so it's crucial to run the command in a terminal to obtain the correct path.

After enabling the FileInfo extension, restart your web server and retry the Composer installation. The dependency should install successfully this time.

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