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<?php |
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namespace Ez\DbLinker\Driver; |
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use Ez\DbLinker\Driver\Connection\MasterSlavesConnection; |
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trait MasterSlavesDriver |
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{ |
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use WrapperDriver; |
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/** |
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* Attempts to create a connection with the database. |
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* |
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* @param array $params All connection parameters passed by the user. |
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* @param string|null $username The username to use when connecting. |
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* @param string|null $password The password to use when connecting. |
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* @param array $driverOptions The driver options to use when connecting. |
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* |
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* @return \Doctrine\DBAL\Driver\Connection The database connection. |
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*/ |
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public function connect(Array $params, $username = null, $password = null, Array $driverOptions = []) { |
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$cache = array_key_exists("config_cache", $driverOptions) ? $driverOptions["config_cache"] : null; |
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$configParams = array_intersect_key($params, array_flip(["master", "slaves"])); |
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$key = "dblinker.master-slave-config.".hash("sha256", serialize($configParams)); |
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$config = null; |
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if ($cache !== null) { |
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assert($driverOptions["config_cache"] instanceof \Psr\Cache\CacheItemPoolInterface); |
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$cacheItem = $cache->getItem($key); |
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$config = $cacheItem->get(); |
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} |
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if ($config === null) { |
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$config = $this->config($configParams, $driverOptions); |
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} |
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if ($cache !== null) { |
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$cacheItem->set($config); |
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$cache->save($cacheItem); |
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} |
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return new MasterSlavesConnection($config["master"], $config["slaves"]); |
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} |
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private function config(array $params, array $driverOptions) |
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{ |
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$driverKey = array_key_exists('driverClass', $params['master']) ? 'driverClass' : 'driver'; |
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$driverValue = $params['master'][$driverKey]; |
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$slaves = []; |
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foreach ($params['slaves'] as $slaveParams) { |
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$slaveParams[$driverKey] = $driverValue; |
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$slaves[] = $slaveParams; |
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} |
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$config = [ |
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"master" => $params["master"], |
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"slaves" => $slaves, |
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]; |
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if (!array_key_exists("config_transform", $driverOptions)) { |
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return $config; |
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} |
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assert(is_callable($driverOptions["config_transform"])); |
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return $driverOptions["config_transform"]($config); |
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} |
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} |
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ezweb /
dblinker
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: