Il n’est pas toujours possible d’obtenir les pré-requis d’une application construite autour de composer et notamment la version minimum de PHP nécessaire à son fonctionnement.

Voici une commande qui devrait vous aider :

composer why php

Un exemple de résultat :

ddeboer/data-import 0.19.1 requires php (>=5.4.0)
doctrine/annotations v1.2.7 requires php (>=5.3.2)
doctrine/cache v1.5.1 requires php (>=5.3.2)
doctrine/collections v1.3.0 requires php (>=5.3.2)
doctrine/common v2.5.1 requires php (>=5.3.2)
doctrine/dbal v2.5.2 requires php (>=5.3.2)
doctrine/doctrine-bundle 1.6.0 requires php (>=5.3.2)
doctrine/doctrine-cache-bundle 1.2.2 requires php (>=5.3.2)
doctrine/inflector v1.1.0 requires php (>=5.3.2)
doctrine/instantiator 1.0.5 requires php (>=5.3,<8.0-DEV) doctrine/lexer v1.0.1 requires php (>=5.3.2)
doctrine/orm v2.5.2 requires php (>=5.4)
guzzlehttp/guzzle 6.2.1 requires php (>=5.5)
guzzlehttp/promises 1.2.0 requires php (>=5.5.0)
guzzlehttp/psr7 1.3.1 requires php (>=5.4.0)
incenteev/composer-parameter-handler v2.1.2 requires php (>=5.3.3)
jdorn/sql-formatter v1.2.17 requires php (>=5.2.4)
jms/aop-bundle 1.2.0 requires php (>=5.3.9)
jms/cg 1.1.0 requires php (>=5.3.0)
jms/di-extra-bundle 1.7.1 requires php (~5.3|~7.0)
jms/metadata 1.5.1 requires php (>=5.3.0)
mmucklo/inflect v0.3.0 requires php (>=5.3.17)
monolog/monolog 1.17.2 requires php (>=5.3.0)
pagerfanta/pagerfanta v1.0.3 requires php (>=5.3.0)
paragonie/random_compat 1.1.0 requires php (>=5.2.0)
psr/http-message 1.0 requires php (>=5.3.0)
sensio/distribution-bundle v5.0.0 requires php (>=5.3.9)
swiftmailer/swiftmailer v5.4.1 requires php (>=5.3.3)
symfony/framework-standard-edition - requires php (>=5.3.9)
symfony/inflector v3.1.3 requires php (>=5.5.9)
symfony/monolog-bundle v2.8.2 requires php (>=5.3.2)
symfony/phpunit-bridge v2.7.7 requires php (>=5.3.9)
symfony/polyfill-apcu v1.2.0 requires php (>=5.3.3)
symfony/polyfill-intl-icu v1.0.0 requires php (>=5.3.3)
symfony/polyfill-mbstring v1.0.0 requires php (>=5.3.3)
symfony/polyfill-php54 v1.0.0 requires php (>=5.3.3)
symfony/polyfill-php55 v1.0.0 requires php (>=5.3.3)
symfony/polyfill-php56 v1.0.0 requires php (>=5.3.3)
symfony/polyfill-php70 v1.0.0 requires php (>=5.3.3)
symfony/polyfill-util v1.0.0 requires php (>=5.3.3)
symfony/property-access v3.1.3 requires php (>=5.5.9)
symfony/security-acl v2.7.7 requires php (>=5.3.9)
symfony/swiftmailer-bundle v2.3.8 requires php (>=5.3.2)
symfony/symfony v2.8.9 requires php (>=5.3.9)
twig/twig v1.23.1 requires php (>=5.2.7)
zendesk/zendesk_api_client_php v2.1.2 requires php (>=5.5.0)

[alert-box color=’blue’]Dans ce cas, la version minimum de PHP supportée sera 5.5.9[/alert-box]