A php dependency management tool Composer-php Tutorial

A dependency management tool for PHP Composer 1: Download

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

Or

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

2: move to the bin directory and use the composer command each time.

mv composer.phar /usr/local/bin/composer

View version

composer -V

3. composer. json install monolog in the project
The content of the composer. json file is as follows:

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

Use composer install to install and create the vendor, monolog, and monolog directories in the current directory.
Composer generates a file named vendor/autoload. php. You can simply introduce this file and you will get a free automatic loading support.
This makes it easy for you to use third-party code. The project depends on monolog. you can start using this class library like this and they will be automatically loaded.

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

4. download the thinkphp framework and install monolog.

composer create-project topthink/thinkphp myProjectNamecd myProjectNamevim composer.json

Find require
To:

"Require": {"php": "> = 5.3.0", "monolog/monolog": "1. 0. *"}, find http://packagist.phpcomposer.com to https://packagist.phpcomposer.com

Save and exit

composer install

The current directory will
Create the vendor, monolog, and monolog directories in the current directory.
You can introduce vendor/autoload. php in the framework entry file.
You can use it in the framework.

5. obtain the latest dependency version.

    composer update

If you just want to update several packages

    composer update vendor/package vendor/package2

Batch update with wildcards

    composer update vendor/*