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<?php |
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namespace mindplay\sql\framework\pdo; |
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use InvalidArgumentException; |
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use PDO; |
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/** |
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* This class implements a provider layer over PDO. |
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* |
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* You don't need to use this layer - the framework itself has no dependency on it, but you |
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* may find it useful as a means of addressing certain issues with `PDO`. |
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* |
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* For one, `PDO` instances cannot be created without immediately opening the connection - this |
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* provider does not construct `PDO` and open the connection until you ask for the `PDO` instance. |
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* |
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* Also, `PDO` has no ability to report properties like database-name, username, etc. if you need them. |
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*/ |
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class PDOProvider |
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{ |
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const PROTOCOL_POSTGRES = "pgsql"; |
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const PROTOCOL_MYSQL = "mysql"; |
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private string $protocol; |
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private string $dsn; |
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private string $username; |
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private string $password; |
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/** |
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* @var array<int,mixed> |
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*/ |
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private array $options; |
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private string $host; |
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private int $port; |
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private PDO|null $pdo = null; |
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/** |
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* @param string $protocol database protocol name (one of the PROTOCOL_* class constants) |
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* @param string $dbname name of the database to connect to |
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* @param string $username |
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* @param string $password |
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* @param array<int,mixed>|null $options PDO constructor options (attributes) |
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* @param string|null $host optional hostname; defaults to "localhost" |
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* @param int|null $port optional port-number; defaults to the standard port-number for the given $db type |
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*/ |
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public function __construct(string $protocol, string $dbname, string $username, string $password, array|null $options = null, string|null $host = null, int|null $port = null) |
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{ |
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static $default_port = [ |
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self::PROTOCOL_MYSQL => 3306, |
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self::PROTOCOL_POSTGRES => 5432, |
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]; |
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if (! isset($default_port[$protocol])) { |
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throw new InvalidArgumentException("unsupported DBMS type: {$protocol}"); |
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} |
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if ($port === null) { |
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$port = $default_port[$protocol]; |
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} |
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if ($host === null) { |
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$host = "localhost"; |
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} |
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$this->protocol = $protocol; |
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$this->dsn = "{$protocol}:host={$host};port={$port};dbname={$dbname}"; |
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$this->username = $username; |
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$this->password = $password; |
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$this->options = $options ?: []; |
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$this->host = $host; |
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$this->port = $port; |
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} |
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/** |
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* @return PDO |
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*/ |
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public function getPDO(): PDO |
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{ |
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if (! isset($this->pdo)) { |
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$this->pdo = new PDO($this->dsn, $this->username, $this->password, $this->options); |
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} |
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return $this->pdo; |
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} |
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/** |
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* @return string database procol name (one of the PROTOCOL_* class constants) |
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*/ |
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public function getProtocol(): string |
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{ |
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return $this->protocol; |
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} |
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public function getDSN(): string |
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{ |
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return $this->dsn; |
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} |
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public function getUsername(): string |
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{ |
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return $this->username; |
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} |
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public function getPassword(): string |
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{ |
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return $this->password; |
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} |
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/** |
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* @return array<int,mixed> |
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*/ |
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public function getOptions(): array |
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{ |
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return $this->options; |
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} |
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public function getHost(): string |
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{ |
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return $this->host; |
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} |
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public function getPort(): int |
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{ |
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return $this->port; |
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} |
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} |
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mindplay-dk /
sql
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