README

Yii Requirements Checker

The package allows to check if a certain set of defined requirements is met.

General usage

Requirements checker could be used either from web or from command line. Create requirements.php:

<?php
require_once('/path/to/requirements/RequirementsChecker.php');

$config = array(
    array(
        'name' => 'PHP version',
        'mandatory' => true,
        'condition' => version_compare(PHP_VERSION, '7.2.0', '>='),
        'by' => '<a href="http://www.yiiframework.com">Yii Framework</a>',
        'memo' => 'PHP 7.2.0 or higher is required.',
    ),
    array(
        'name' => 'PDO MySQL extension',
        'mandatory' => false,
        'condition' => extension_loaded('pdo_mysql'),
        'by' => 'All DB-related classes',
        'memo' => 'Required for MySQL database.',
    ),
    array(
        'name' => 'Intl extension',
        'mandatory' => false,
        'condition' => $this->checkPhpExtensionVersion('intl', '1.0.2', '>='),
        'by' => '<a href="https://secure.php.net/manual/en/book.intl.php">Internationalization</a> support',
        'memo' => 'PHP Intl extension 1.0.2 or higher is required.'
    ),    
);

$requirementsChecker = new RequirementsChecker();

$result = $requirementsChecker
    ->checkYii()
    ->check($config)
    ->getResult();
$requirementsChecker->render();
exit($result['summary']['errors'] === 0 ? 0 : 1);

Now it could be either put to webroot or executed as php requirements.php.

Note that the code above uses PHP 4. That is done on purpose so the checker could be executed in a very old setups and tell that upgrade should be done.