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PHP Trait for validating a key=>value configuration array
namespace Patterns;
trait ConfigurableTrait {
private $requiredConfigKeys;
private function validateConfiguration($config)
if (empty($config))
throw new \Exception("\$config parameter should be an array of configuration options");
if (empty($this->requiredConfigKeys))
throw new \Exception("\$this->requiredConfigKeys member should be an array of required configuration options");
foreach ($this->requiredConfigKeys as $key) {
$this->configurationKeyExists($key, $config);
private function configurationKeyExists($configurationKey, $configurationArray) {
if (!array_key_exists($configurationKey, $configurationArray))
throw new \Exception("Configuration key '$configurationKey' does not exist");
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