Composer

Installer Composer dans un projet

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php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"

php -r "if (hash_file('SHA384', 'composer-setup.php') === '55d6ead61b29c7bdee5cccfb50076874187bd9f21f65d8991d46ec5cc90518f447387fb9f76ebae1fbbacf329e583e30') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"

php composer-setup.php

php -r "unlink('composer-setup.php');"

composer.json

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{
    "name": "Proxidata",
    "description": "Proxidata est une application web de visualisation et d'achat de données B2B.",
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=7.0.4",
        "silex/silex": "@stable",
        "silex/web-profiler": ">=2.0",
        "symfony/http-kernel": ">=3.1",
        "symfony/routing": ">=2.8|>=3.0",
        "symfony/asset": ">=2.8|3.0.*",
        "symfony/browser-kit": ">=2.8|3.0.*",
        "symfony/class-loader": ">=2.8|3.0.*",
        "symfony/config": ">=2.8|3.0.*",
        "symfony/console": ">=2.8|3.0.*",
        "symfony/css-selector": ">=2.8|3.0.*",
        "symfony/debug": ">=2.8|3.0.*",
        "symfony/var-dumper": ">=2.8|3.0.*",
        "symfony/finder": ">=2.8|3.0.*",
        "symfony/form": ">=2.8|3.0.*",
        "symfony/monolog-bridge": ">=2.8|3.0.*",
        "symfony/process": ">=2.8|3.0.*",
        "symfony/security": ">=2.8|3.0.*",
        "symfony/translation": ">=2.8|3.0.*",
        "symfony/twig-bridge": ">=2.8|3.0.*",
        "symfony/validator": ">=2.8|3.0.*",
        "symfony/yaml": ">=2.8|3.0.*",
        "symfony/http-foundation": ">=2.8|3.0.*",
        "deralex/yaml-config-service-provider": "2.0.x-dev",
        "phpmailer/phpmailer": ">=5.2",
        "spipu/html2pdf": "^4.6",
        "paypal/rest-api-sdk-php": "*"
    },
    "autoload": {
        "psr-0": { "": "src/" }
    },
    "extra": {
        "branch-alias": {
            "dev-master": "2.0.x-dev"
        }
    },
    "scripts": {
        "run": [
            "echo 'Started web server on http://localhost:8888'",
            "php -S localhost:8888 -t web web/index_dev.php"
        ]
    }
}

Constraint	Internally
1.2.3	=1.2.3.0-stable
>1.2	>1.2.0.0-stable
>=1.2	>=1.2.0.0-dev
>=1.2-stable	>=1.2.0.0-stable
<1.3	<1.3.0.0-dev
<=1.3	<=1.3.0.0-stable
1 - 2	>=1.0.0.0-dev <3.0.0.0-dev
~1.3	>=1.3.0.0-dev <2.0.0.0-dev
1.4.*	>=1.4.0.0-dev <1.5.0.0-dev

Tilde

The ~ operator is best explained by example: ~1.2 is equivalent to >=1.2 <2.0.0, while ~1.2.3 is equivalent to >=1.2.3 <1.3.0. As you can see it is mostly useful for projects respecting semantic versioning. A common usage would be to mark the minimum minor version you depend on, like ~1.2 (which allows anything up to, but not including, 2.0). Since in theory there should be no backwards compatibility breaks until 2.0, that works well. Another way of looking at it is that using ~ specifies a minimum version, but allows the last digit specified to go up.

Caret

The ^ operator behaves very similarly but it sticks closer to semantic versioning, and will always allow non-breaking updates. For example ^1.2.3 is equivalent to >=1.2.3 <2.0.0 as none of the releases until 2.0 should break backwards compatibility. For pre-1.0 versions it also acts with safety in mind and treats ^0.3 as >=0.3.0 <0.4.0.

Stability

To allow various stabilities without enforcing them at the constraint level however, you may use stability-flags like @<stability> (e.g. @dev) to let composer know that a given package can be installed in a different stability than your default minimum-stability setting.

Mettre à jour les paquets

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php composer.phar update

Charger tous les paquets dans le projet (Autoload Dependencies)

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require 'vendor/autoload.php';
require __DIR__ . '/vendor/autoload.php';