170 lines
3.4 KiB
PHP
170 lines
3.4 KiB
PHP
<?php namespace Laravel\DB;
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class Connection {
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/**
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* The connection name.
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*
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* @var string
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*/
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public $name;
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/**
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* The connection configuration.
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*
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* @var array
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*/
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public $config;
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/**
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* The PDO connection.
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*
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* @var PDO
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*/
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public $pdo;
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/**
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* All of the queries that have been executed on the connection.
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*
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* @var array
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*/
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public $queries = array();
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/**
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* The database connector instance.
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*
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* @var Connector
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*/
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protected $connector;
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/**
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* Create a new Connection instance.
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*
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* @param string $name
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* @param array $config
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* @param Connector $connector
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* @return void
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*/
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public function __construct($name, $config, Connector $connector)
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{
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$this->name = $name;
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$this->config = $config;
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$this->connector = $connector;
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}
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/**
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* Establish the PDO connection for the connection instance.
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*
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* @return void
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*/
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protected function connect()
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{
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$this->pdo = $this->connector->connect($this->config);
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}
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/**
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* Determine if a PDO connection has been established for the connection.
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*
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* @return bool
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*/
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protected function connected()
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{
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return ! is_null($this->pdo);
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}
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/**
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* Execute a SQL query against the connection and return a scalar result.
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*
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* @param string $sql
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* @param array $bindings
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* @return mixed
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*/
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public function scalar($sql, $bindings = array())
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{
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$result = (array) $this->first($sql, $bindings);
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return (strpos(strtolower($sql), 'select count') === 0) ? (int) reset($result) : (float) reset($result);
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}
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/**
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* Execute a SQL query against the connection and return the first result.
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*
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* @param string $sql
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* @param array $bindings
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* @return object
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*/
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public function first($sql, $bindings = array())
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{
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return (count($results = $this->query($sql, $bindings)) > 0) ? $results[0] : null;
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}
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/**
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* Execute a SQL query against the connection.
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*
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* The method returns the following based on query type:
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*
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* SELECT -> Array of stdClasses
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* UPDATE -> Number of rows affected.
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* DELETE -> Number of Rows affected.
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* ELSE -> Boolean true / false depending on success.
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*
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* @param string $sql
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* @param array $bindings
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* @return mixed
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*/
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public function query($sql, $bindings = array())
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{
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if ( ! $this->connected()) $this->connect();
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$this->queries[] = compact('sql', 'bindings');
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return $this->execute($this->pdo->prepare($sql), $bindings);
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}
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/**
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* Execute a prepared PDO statement and return the appropriate results.
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*
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* @param PDOStatement $statement
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* @param array $results
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* @return mixed
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*/
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protected function execute(\PDOStatement $statement, $bindings)
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{
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$result = $statement->execute($bindings);
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if (strpos(strtoupper($statement->queryString), 'SELECT') === 0)
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{
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return $statement->fetchAll(\PDO::FETCH_CLASS, 'stdClass');
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}
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elseif (strpos(strtoupper($statement->queryString), 'INSERT') === 0)
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{
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return $result;
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}
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return $statement->rowCount();
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}
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/**
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* Begin a fluent query against a table.
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*
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* @param string $table
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* @return Query
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*/
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public function table($table)
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{
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return Query\Factory::make($table, $this);
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}
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/**
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* Get the driver name for the database connection.
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*
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* @return string
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*/
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public function driver()
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{
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if ( ! $this->connected()) $this->connect();
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return $this->pdo->getAttribute(\PDO::ATTR_DRIVER_NAME);
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}
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} |