info Composer

HowtoPHP.md

@@ -225,3 +225,54 @@ DocumentRoot /home/bench/www/
 #ProxyPassMatch "^/(.*\.php(/.*)?)$" "fcgi://127.0.0.1:9000//home/foo/www/$1"
 ProxyPassMatch "^/(.*\.php(/.*)?)$" "unix:/var/run/php5-fpm.sock|fcgi://localhost/home/foo/www/"
 ~~~
+
+## Composer
+
+* Documentation : <https://getcomposer.org/doc/>
+
+[Composer](https://getcomposer.org/) est un outil moderne de gestion des bibliothèques PHP, qui tend à remplacer le vieil outil [PEAR](https://pear.php.net/). Il est disponible à partir de Debian 9. 
+
+Composer s'utilise sans les droits _root_.
+Il s'appuye sur la présence d'un fichier `composer.json` qui déclare les bibliothèques à installer.
+
+~~~
+$ composer about
+Composer - Package Management for PHP
+Composer is a dependency manager tracking local dependencies of your projects and libraries.
+See https://getcomposer.org/ for more information.
+
+echo '{"require": {"twig/extensions": "~1.0"}}' > composer.json
+
+$ composer update
+Loading composer repositories with package information
+Updating dependencies (including require-dev)
+  - Installing symfony/polyfill-mbstring (v1.5.0)
+    Loading from cache
+
+  - Installing twig/twig (v2.4.3)
+    Loading from cache
+
+  - Installing twig/extensions (v1.5.1)
+    Loading from cache
+
+twig/extensions suggests installing symfony/translation (Allow the time_diff output to be translated)
+Writing lock file
+Generating autoload files
+
+$ composer show
+symfony/polyfill-mbstring v1.5.0 Symfony polyfill for the Mbstring extension
+twig/extensions           v1.5.1 Common additional features for Twig that do not directly belong in core
+twig/twig                 v2.4.3 Twig, the flexible, fast, and secure template language for PHP
+~~~
+
+### Composer sous Debian 8
+
+~~~
+$ wget https://getcomposer.org/installer
+$ sha384sum installer
+$ mkdir bin
+$ php -d allow_url_fopen=On installer --install-dir=bin --filename=composer
+$ php bin/composer --version
+PHP Warning:  putenv() has been disabled for security reasons
+Composer version 1.5.1 2017-08-09 16:07:22
+~~~