Use of PHP dependency management tool Composer

Today I saw an introduction to the dependency management tool under PHP, so I learned and tried it:

Environment: win7

1. Installation

1. Confirm that PHP has enabled the openssl module (used when using https URLs);

Modify the environment Variable path, add c:xamppphp

Open the command line, enter:

php -version

Display:

Use the cd command to change the current path to the project root directory, and then run the command to download and install:

php -r "readfile('http://getcomposer.org/installer');" | php

I am using the http protocol URL here. If you have curl, you can also use the following command: The official website of

curl -sS https://getcomposer.org/installer | php

suggested that you can also directly download the installation package Composer-Setup.exe. Unfortunately, I saw it too late and did not try it out.

Go to the project root directory, add the composer.bat text file, and execute it on the command line:

echo @php "%~dp0composer.phar" %*>composer.bat

Close and reopen the command line, enter the command:

composer -V

to see the output version information.

Second example, the project needs to use monolog, a library that outputs logs.

Create the composer.json file in the project, enter the content:

{
    "require": {
        "monolog/monolog": "1.0.*"
    }
}

Execute on the cmd command line:

composer install

The required URL may not be downloaded normally due to some reasons. The prompt content may be:

Failed to enable crypto
failed to open stream: operation failed

At this time you have to consider solving your own network problems.

After running successfully, the vendor folder will appear in the project folder.

Usage example:

<?php
require_once  &#39;vendor/autoload.php&#39;;

$log = new Monolog\Logger(&#39;name&#39;);
$log->pushHandler(new Monolog\Handler\StreamHandler('app.log', Monolog\Logger::WARNING));

$log->addWarning('Foo');
?>

3. Others

Update self:

composer self-update

The above introduces the use of the PHP dependency management tool Composer, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.