PHP management dependency relationship tool Composer installation and use, dependencycomposer_PHP tutorial

PHP management dependency relationship tool Composer installation and use, dependencycomposer

PHP Composer Installation

System requirements:

Composer requires PHP5.3.2+ or above environment to run. There are several sensitive PHP settings and compilation flags that are also required, but the installer will issue a warning when any incompatibilities exist.

For example, the requirement for PHP extensions is to install or recompile php without –disable-phar

In order to install a software package from the source address, rather than a simple compressed file package, you will need to install a version control tool for the software package, such as git, svn or hg, etc.

Composer is multi-platform compatible and runs on Windows, Linux and OSX.

Error message for installation failure:

curl -sS https://getcomposer.org/installer | PHP 
#!/usr/bin/env php 
some settings on your machine make Composer unable to work properly. 
Make sure that you fix the issues listed below and run this script again:

The phar extension is missing. 
Install it or recompile php without –disable-phar

Your PHP (5.2.9) is too old, you must upgrade to PHP 5.3.2 or higher.

My local default development environment is PHP 5.2.9. When I try to install on PHP 5.2.9, it prompts that the version is too low and needs to be upgraded to PHP 5.3.2 or higher.

So I downloaded XAMPP 1.7.7 usb lite version.

E:\USB\Dropbox\phpstorm\php53>E:\USB\xampp_177\php\php.exe -v 
PHP 5.3.8 (cli) (built: Aug 23 2011 11:50:20) 
Copyright (c) 1997-2011 The PHP Group 
Zend Engine v2.3.0, Copyright (c) 1998-2011 Zend Technologies

The PHP environment under XAMPP 1.7.7 is 5.3.8. After confirming that my PHP environment is greater than or equal to PHP5.3.2.

PHP 5.3 Install Composer

E:\USB\Dropbox\phpstorm\php53>curl -sS https://getcomposer.org/installer | E:\USB\xampp_177\php\php.exe 
#!/usr/bin/env php 
Some settings on your machine may cause stability issues with Composer. 
If you encounter issues, try to change the following:

The openssl extension is missing, which will reduce the security and stability o 
f Composer. 
If possible you should enable it or recompile php with –with-openssl

Downloading…

Composer successfully installed to: E:\USB\Dropbox\phpstorm\php53\composer.phar 
Use it: php composer.phar

Note:

I turned off the SSL module of XAMPP 1.7.7 Apache, so Composer prompted me with a warning and suggested that I enable the SSL module for security reasons. It will not affect use if it is not turned on.
The installation parameters | PHP must be changed to the real PHP environment path, such as | E:USBxampp_177phpphp.exe
Use Composer as the PHP path + command. In the environment we installed, the usage method is: E:USBxampp_177php/php.exe composer.phar command.
The environment I installed is under Windows. If it is under Linux and the PHP 5.3 environment is not under the default PHP command, you should use | /usr/php/53/usr/bin/php, for example:

curl -sS https://getcomposer.org/installer | /usr/php/53/usr/bin/php

After the installation is complete, check the installed version.

E:\USB\Dropbox\phpstorm\php53>E:\USB\xampp_177\php/php.exe composer.phar -V 
Composer version 0209bd31a0ac3aeb2a68fc81e2d03c71072bef33

Check PHP Composer commands:

E:\USB\Dropbox\phpstorm\php53>E:\USB\xampp_177\php/php.exe composer.phar 
  ______ 
 / ____/___ ____ ___ ____ ____ ________ _____ 
/ /  / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/ 
/ /___/ /_/ / / / / / / /_/ / /_/ (__ ) __/ / 
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/ 
          /_/ 
Composer version 0209bd31a0ac3aeb2a68fc81e2d03c71072bef33

Usage: 
 [options] command [arguments]

Options: 
 –help      -h Display this help message. 
 –quiet     -q Do not output any message. 
 –verbose    -v Increase verbosity of messages. 
 –version    -V Display this application version. 
 –ansi       Force ANSI output. 
 –no-ansi      Disable ANSI output. 
 –no-interaction -n Do not ask any interactive question. 
 –profile      Display timing and memory usage information 
 –working-dir  -d If specified, use the given directory as working directory 
.

Available commands: 
 about      Short information about Composer 
 archive     Create an archive of this composer package 
 config      Set config options 
 create-project  Create new project from a package into given directory. 
 depends     Shows which packages depend on the given package 
 diagnose     Diagnoses the system to identify common errors. 
 dump-autoload  Dumps the autoloader 
 dumpautoload   Dumps the autoloader 
 help       Displays help for a command 
 init       Creates a basic composer.json file in current directory. 
 install     Installs the project dependencies from the composer.lock file 
if present, or falls back on the composer.json. 
 list       Lists commands 
 require     Adds required packages to your composer.json and installs the 
m 
 run-script    Run the scripts defined in composer.json. 
 search      Search for packages 
 self-update   Updates composer.phar to the latest version. 
 selfupdate    Updates composer.phar to the latest version. 
 show       Show information about packages 
 status      Show a list of locally modified packages 
 update      Updates your dependencies to the latest version according to 
composer.json, and updates the composer.lock file. 
 validate     Validates a composer.json

In this way, our Composer installation in the PHP5.3 environment has been completed.

Similarly, we can also install PHP 5.4 environment.

PHP 5.4 Install Composer

Download XAMPP 1.8.1 usb lite version and you will get PHP5.4.7 environment.

E:\USB\Dropbox\phpstorm\php53>E:\USB\xampp_181\php\php.exe -v 
PHP 5.4.7 (cli) (built: Sep 12 2012 23:48:31) 
Copyright (c) 1997-2012 The PHP Group 
Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies

After confirming that the version is higher than PHP 5.3.2, start the installation:

E:\USB\Dropbox\phpstorm\php54>curl -sS https://getcomposer.org/installer | E:\USB\xampp_181\php\php.exe 
#!/usr/bin/env php 
Some settings on your machine may cause stability issues with Composer. 
If you encounter issues, try to change the following:

The openssl extension is missing, which will reduce the security and stability o 
f Composer. 
If possible you should enable it or recompile php with –with-openssl

Downloading…

Composer successfully installed to: E:\USB\Dropbox\phpstorm\php54\composer.phar 
Use it: php composer.phar

After the installation is complete, check the installed version.

E:\USB\Dropbox\phpstorm\php54>E:\USB\xampp_181\php/php.exe composer.phar -V 
Composer version 0209bd31a0ac3aeb2a68fc81e2d03c71072bef33

In this way, Composer in the PHP 5.4 environment is also installed successfully.

PHP Composer using

Here I only briefly demonstrate using PHP Composer to install the Symfony framework.

First of all, let’s briefly explain the standard format of the command:

php composer.phar create-project symfony/framework-standard-edition path/ 2.2.1

The first parameter PHP is the local PHP development environment, pointing to the PHP running command.
The second parameter is downloaded in composer.phar mode.
The third parameter is an action command, such as create-project, whose purpose is to create a new project from a software package to the specified directory.
The fourth parameter is the local installation directory.
The fifth parameter is the version of the installed software package.

According to the Composer we installed in the PHP5.4 environment above, our installation command is:

E:\USB\Dropbox\phpstorm\php54>E:\USB\xampp_181\php/php.exe composer.phar create-project symfony/framework-standard-edition E:\USB\xampp_181\htdocs\Symfony 2.2.1

Installation result:

Installing symfony/framework-standard-edition (v2.2.1) 
 – Installing symfony/framework-standard-edition (v2.2.1) 
  Downloading: 100%
Created project in E:\USB\xampp_181\htdocs\Symfony 
Loading composer repositories with package information 
Installing dependencies from lock file 
 – Installing doctrine/lexer (v1.0) 
  Downloading: 100%
 – Installing doctrine/annotations (v1.1) 
  Downloading: 100%
 – Installing doctrine/cache (v1.0) 
  Downloading: 100%
 – Installing doctrine/collections (v1.1) 
  Downloading: 100%
 – Installing twig/twig (v1.12.2) 
  Downloading: 100%
 – Installing psr/log (1.0.0) 
  Downloading: 100%
 – Installing doctrine/inflector (v1.0) 
  Downloading: 100%
 – Installing doctrine/common (2.4.0-RC1) 
  Downloading: 100%
 – Installing symfony/symfony (v2.2.1) 
  Downloading: 100%
 – Installing jdorn/sql-formatter (v1.2.0) 
  Downloading: 100%
 – Installing doctrine/dbal (2.3.3) 
  Downloading: 100%
 – Installing doctrine/doctrine-bundle (v1.2.0-beta1) 
  Downloading: 100%
 – Installing doctrine/orm (2.3.3) 
  Downloading: 100%
 – Installing jms/cg (1.0.0) 
  Downloading: 100%
 – Installing phpoption/phpoption (1.2.0) 
  Downloading: 100%
 – Installing jms/parser-lib (1.0.0) 
  Downloading: 100%
 – Installing jms/metadata (1.3.0) 
  Downloading: 100%
 – Installing jms/aop-bundle (1.0.0) 
  Downloading: 100%
 – Installing jms/di-extra-bundle (1.3.0) 
  Downloading: 100%
 – Installing jms/security-extra-bundle (1.4.0) 
  Downloading: 100%
 – Installing sensio/distribution-bundle (v2.2.1) 
  Downloading: 100%
 – Installing sensio/framework-extra-bundle (v2.2.1) 
  Downloading: 100%
 – Installing sensio/generator-bundle (v2.2.1) 
  Downloading: 100%
 – Installing kriswallsmith/assetic (v1.1.0-alpha4) 
  Downloading: 100%
 – Installing symfony/assetic-bundle (v2.1.2) 
  Downloading: 100%
 – Installing monolog/monolog (1.4.1) 
  Downloading: 100%
 – Installing symfony/monolog-bundle (v2.2.0) 
  Downloading: 100%
 – Installing swiftmailer/swiftmailer (v4.3.0) 
  Downloading: 100%
 – Installing symfony/swiftmailer-bundle (v2.2.0) 
  Downloading: 100%
 – Installing twig/extensions (v1.0.0) 
  Downloading: 100%

kriswallsmith/assetic suggests installing leafo/lessphp (Assetic provides the integration with the lessphp LESS compiler) 
kriswallsmith/assetic suggests installing leafo/scssphp (Assetic provides the integration with the scssphp SCSS compiler) 
kriswallsmith/assetic suggests installing leafo/scssphp-compass (Assetic provides the integration with the SCSS compass plugin) 
kriswallsmith/assetic suggests installing ptachoire/cssembed (Assetic provides the integration with phpcssembed to embed data uris) 
monolog/monolog suggests installing doctrine/couchdb (Allow sending log messages to a CouchDB server) 
monolog/monolog suggests installing ext-amqp (Allow sending log messages to an AMQP server (1.0+ required)) 
monolog/monolog suggests installing ext-mongo (Allow sending log messages to a MongoDB server) 
monolog/monolog suggests installing mlehner/gelf-php (Allow sending log messages to a GrayLog2 server) 
monolog/monolog suggests installing raven/raven (Allow sending log messages to a Sentry server) 
Generating autoload files 
Clearing the cache for the dev environment with debug true 
Installing assets using the hard copy option 
Installing assets for Symfony\Bundle\FrameworkBundle into web/bundles/framework 
Installing assets for Acme\DemoBundle into web/bundles/acmedemo 
Installing assets for Sensio\Bundle\DistributionBundle into web/bundles/sensiodistribution

From the command line results, we see the installation process and results of the entire Symfony framework.

PHP Composer defines dependencies

Composer will automatically look for the composer.json file when used. composer.json will be used to define the dependency packages of the entire project. For example:

{ 
  "require": { 
    "monolog/monolog": "1.2.*" 
  } 
}

A brief description of dependency packages, our project requires some monolog/monolog packages of any version starting from 1.2.

Composer is a dependency management tool in PHP. Through Composer we can save a lot of files and control the versions of dependent packages when publishing software.

PHP Composer Project

Composer project official: http://getcomposer.org

Composer Github project: https://github.com/composer/composer

PHP Composer package list: https://packagist.org/

When installing composer setup under wamp, the prompt The openssl extension is missing

No, change to the integration package phpstudy. openssl is configured by default. phpstudy extension management is very convenient, just hook it up when using it. As shown in the picture. Support one-click switching from php5.2 to 5.6

The following error occurs when yii2 is installed using composer, please help...

Your php does not enable the mongodb extension~~~~It has nothing to do with Composer

Open your php.ini and enable the mongodb extension (remove the ";" sign in front)

Restart you server (apache, iis...)

Then try again

If it is a Linux system, I don’t know, you can search it

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