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<?php |
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namespace Nip\Database\Connectors; |
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use PDO; |
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/** |
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* Class MySqlConnector |
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* @package Nip\Database\Connectors |
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*/ |
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class MySqlConnector extends Connector |
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{ |
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/** |
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* Establish a database connection. |
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* |
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* @param array $config |
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* @return \PDO |
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*/ |
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public function connect(array $config) |
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{ |
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$dsn = $this->getDsn($config); |
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$options = $this->getOptions($config); |
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// We need to grab the PDO options that should be used while making the brand |
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// new connection instance. The PDO options control various aspects of the |
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// connection's behavior, and some might be specified by the developers. |
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$connection = $this->createConnection($dsn, $config, $options); |
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if (!empty($config['database'])) { |
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$connection->exec("use `{$config['database']}`;"); |
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} |
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$this->configureIsolationLevel($connection, $config); |
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$this->configureEncoding($connection, $config); |
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// Next, we will check to see if a timezone has been specified in this config |
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// and if it has we will issue a statement to modify the timezone with the |
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// database. Setting this DB timezone is an optional configuration item. |
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$this->configureTimezone($connection, $config); |
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$this->setModes($connection, $config); |
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return $connection; |
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} |
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/** |
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* Set the connection transaction isolation level. |
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* |
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* @param \PDO $connection |
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* @param array $config |
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* @return void |
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*/ |
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protected function configureIsolationLevel($connection, array $config) |
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{ |
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if (!isset($config['isolation_level'])) { |
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return; |
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} |
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$connection->prepare( |
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"SET SESSION TRANSACTION ISOLATION LEVEL {$config['isolation_level']}" |
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)->execute(); |
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} |
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/** |
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* Set the connection character set and collation. |
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* |
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* @param \PDO $connection |
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* @param array $config |
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* @return void|\PDO |
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*/ |
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protected function configureEncoding($connection, array $config) |
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{ |
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if (!isset($config['charset'])) { |
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return $connection; |
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} |
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$connection->prepare( |
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"set names '{$config['charset']}'".$this->getCollation($config) |
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)->execute(); |
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} |
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/** |
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* Get the collation for the configuration. |
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* |
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* @param array $config |
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* @return string |
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*/ |
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protected function getCollation(array $config) |
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{ |
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return isset($config['collation']) ? " collate '{$config['collation']}'" : ''; |
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} |
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/** |
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* Set the timezone on the connection. |
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* |
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* @param \PDO $connection |
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* @param array $config |
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* @return void |
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*/ |
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protected function configureTimezone($connection, array $config) |
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{ |
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if (isset($config['timezone'])) { |
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$connection->prepare('set time_zone="'.$config['timezone'].'"')->execute(); |
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} |
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} |
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/** |
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* Create a DSN string from a configuration. |
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* |
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* Chooses socket or host/port based on the 'unix_socket' config value. |
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* |
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* @param array $config |
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* @return string |
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*/ |
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protected function getDsn(array $config) |
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{ |
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return $this->hasSocket($config) |
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? $this->getSocketDsn($config) |
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: $this->getHostDsn($config); |
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} |
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/** |
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* Determine if the given configuration array has a UNIX socket value. |
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* |
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* @param array $config |
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* @return bool |
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*/ |
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protected function hasSocket(array $config) |
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{ |
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return isset($config['unix_socket']) && !empty($config['unix_socket']); |
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} |
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/** |
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* Get the DSN string for a socket configuration. |
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* |
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* @param array $config |
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* @return string |
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*/ |
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protected function getSocketDsn(array $config) |
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{ |
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return "mysql:unix_socket={$config['unix_socket']};dbname={$config['database']}"; |
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} |
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/** |
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* Get the DSN string for a host / port configuration. |
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* |
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* @param array $config |
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* @return string |
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*/ |
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protected function getHostDsn(array $config) |
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{ |
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extract($config, EXTR_SKIP); |
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return isset($port) |
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? "mysql:host={$host};port={$port};dbname={$database}" |
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: "mysql:host={$host};dbname={$database}"; |
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} |
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/** |
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* Set the modes for the connection. |
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* |
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* @param \PDO $connection |
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* @param array $config |
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* @return void |
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*/ |
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protected function setModes(PDO $connection, array $config) |
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{ |
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if (isset($config['modes'])) { |
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$this->setCustomModes($connection, $config); |
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} elseif (isset($config['strict'])) { |
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if ($config['strict']) { |
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$connection->prepare($this->strictMode($connection, $config))->execute(); |
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} else { |
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$connection->prepare("set session sql_mode='NO_ENGINE_SUBSTITUTION'")->execute(); |
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} |
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} |
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} |
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/** |
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* Set the custom modes on the connection. |
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* |
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* @param \PDO $connection |
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* @param array $config |
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* @return void |
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*/ |
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protected function setCustomModes(PDO $connection, array $config) |
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{ |
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$modes = implode(',', $config['modes']); |
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$connection->prepare("set session sql_mode='{$modes}'")->execute(); |
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} |
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/** |
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* Get the query to enable strict mode. |
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* |
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* @param \PDO $connection |
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* @param array $config |
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* @return string |
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*/ |
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protected function strictMode(PDO $connection, $config) |
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{ |
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$version = $config['version'] ?? $connection->getAttribute(PDO::ATTR_SERVER_VERSION); |
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if (version_compare($version, '8.0.11') >= 0) { |
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return "set session sql_mode='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'"; |
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} |
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return "set session sql_mode='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'"; |
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} |
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} |
bytic /
database
