[Validation] Checks if the provided array configuration is cache-able

[gabbydgab]

Ability to check if the array configuration is cache-able or not. Will return false if the configuration is mapped to a closure.

$config = [
    'dependencies' => [
         'factories' => [
             'closure-factory' => function () { return new \stdClass() }
         ]
    ]
];
// backwards compatible
ArrayUtils::isCacheable($config); // returns false

// using validator class
ArrayValidator::isCacheable($config); // returns false

Checking all loaded configuration:

It will reduce the following merge configuration logic in Zend\ConfigAggregator

Practical usage

private function cacheConfig(array $config, $cachedConfigFile)
{
    if (!ArrayValidator::isCacheable($config)) {
          throw new InvalidArgumentException('Cannot cached config from %s; does not return array', $config);
    }

    // cache the config
}