Intervention Image - Could not open input file: composer.phar

When I install the php composer.phar require intervention/image this,

I got the one error:

Could not open input file: composer.phar

I follow this step but I can't find the solution to my error: Intervention Image

Solution

To install the most recent version, run the following command

composer require intervention/image

Add to composer.json file:

"require": {
        "intervention/image": "^2.5",
    },

After, Run this command in the command prompt: composer update