====== Installer Composer ======
===== Prérequis =====
PHP doit être installer.

Pour tester si PHP est installé, tapez dans un terminal ''php -v''
<code>
C:\Users\thierry>php -v
PHP 7.3.6 (cli) (built: May 29 2019 12:11:00) ( ZTS MSVC15 (Visual C++ 2017) x64 )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.6, Copyright (c) 1998-2018 Zend Technologies
</code>

Sinon rendez-vous ici :  [[prog:php:installer]]

<note important>Il est bon d'activer l'extension ''curl'' dans php.ini</note>

===== Installation de Composer sous Windows =====
==== Installer  ====

Télécharger l'exécutable ''composer-setup.exe'' sur la page [[https://getcomposer.org/download/]].

Puis l’exécuter !

Il va créer une nouvelle variable dans le path de Windows ce qui nécessitera un **redémarrage du PC pour que le nouveau path soit pris en compte**.

{{:technos:php:composer-setup.jpg|}}
==== Tester ====
Sous Windows on utilisera la commande ''composer'' et non pas ''php composer.phar'' (sous linux)

On tape ''composer'' dans un terminal :
<code powershell>
C:\Users\thierry>composer
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /    
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/     
                    /_/
Composer version 1.9.0 2019-08-02 20:55:32

Usage:
  command [options] [arguments]

Options:
  -h, --help                     Display this help message
  -q, --quiet                    Do not output any message
  -V, --version                  Display this application version
      --ansi                     Force ANSI output
      --no-ansi                  Disable ANSI output
  -n, --no-interaction           Do not ask any interactive question
      --profile                  Display timing and memory usage information
      --no-plugins               Whether to disable plugins.
  -d, --working-dir=WORKING-DIR  If specified, use the given directory as working directory.
      --no-cache                 Prevent use of the cache
  -v|vv|vvv, --verbose           Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug

Available commands:
  about                Shows the short information about Composer.
  archive              Creates an archive of this composer package.
  browse               Opens the package's repository URL or homepage in your browser.
  check-platform-reqs  Check that platform requirements are satisfied.
  clear-cache          Clears composer's internal package cache.
  clearcache           Clears composer's internal package cache.
  config               Sets config options.
  create-project       Creates new project from a package into given directory.
  depends              Shows which packages cause the given package to be installed.
  diagnose             Diagnoses the system to identify common errors.
  dump-autoload        Dumps the autoloader.
  dumpautoload         Dumps the autoloader.
  exec                 Executes a vendored binary/script.
  global               Allows running commands in the global composer dir ($COMPOSER_HOME).
  help                 Displays help for a command
  home                 Opens the package's repository URL or homepage in your browser.
  i                    Installs the project dependencies from the composer.lock file if present, or falls back on the composer.json.
  info                 Shows information about packages.
  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.
  licenses             Shows information about licenses of dependencies.
  list                 Lists commands
  outdated             Shows a list of installed packages that have updates available, including their latest version.
  prohibits            Shows which packages prevent the given package from being installed.
  remove               Removes a package from the require or require-dev.
  require              Adds required packages to your composer.json and installs them.
  run                  Runs the scripts defined in composer.json.
  run-script           Runs the scripts defined in composer.json.
  search               Searches for packages.
  self-update          Updates composer.phar to the latest version.
  selfupdate           Updates composer.phar to the latest version.
  show                 Shows information about packages.
  status               Shows a list of locally modified packages, for packages installed from source.
  suggests             Shows package suggestions.
  u                    Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  update               Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  upgrade              Upgrades your dependencies to the latest version according to composer.json, and updates the composer.lock file.
  validate             Validates a composer.json and composer.lock.
  why                  Shows which packages cause the given package to be installed.
  why-not              Shows which packages prevent the given package from being installed.
  </code>


===== Installation de Composer sous Linux =====
Pour installer composer et pouvoir l'utiliser dans différents répertoires je fais comme suit:
(Source : [[https://getcomposer.org/download/]])
=== Télécharger Composer-setup ===

Sur un Linux, dans le répértoire ''/home/%myname%'' j'installe le ''composer-setup.php''
<code php [enable_line_numbers="true"]>
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === '93b54496392c062774670ac18b134c3b3a95e5a5e5c8f1a9f115f203b75bf9a129d5daa8ba6a13e2cc8a1da0806388a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
</code>

1. On télécharge le fichier ''composer-setup.php''

2. On vérifie si c'est le bon fichier et si il n'est pas corrompu...

=== Installer Composer.phar dans le répertoire que l'on veut ===

toujours dans le méme répertoire on execute
<code php>
php composer-setup.php --install-dir=/var/www/html/oujeveux
</code>

=== Tester ===

Vous n'avez plus qu'a vous rendre dans votre répértoire ''/var/www/html/oujeveux'' et executer ''php composer.phar''
<code>
cd /var/www/html/oujeveux
php composer.phar diagnose
</code>

Résultat:
<code>
Checking platform settings: OK
Checking git settings: OK
Checking http connectivity to packagist: OK
Checking https connectivity to packagist: OK
Checking github.com rate limit: OK
Checking disk free space: OK
Checking pubkeys:
Tags Public Key Fingerprint: XXXXX.....XXXXX
Dev Public Key Fingerprint: XXXXX.....XXXXX
OK
Checking composer version: OK
Composer version: 1.7.2
PHP version: 7.2.10
PHP binary path: /usr/bin/php7.2
</code>
===== Voir aussi =====
  * [[prog:php:composer:ressources]]
  * [[prog:php:composer:commandes_utiles]]
  * [[https://www.youtube.com/watch?v=EBZ1owgiSSQ|Vidéo sur Composer (GrafikArt)]]