157 lines
3.2 KiB
PHP
157 lines
3.2 KiB
PHP
<?php
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/**
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* Query
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*
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* Free Query Builder / Database Abstraction Layer
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*
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* @author Timothy J. Warren
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* @copyright Copyright (c) 2012
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* @link https://github.com/aviat4ion/Query
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* @license http://philsturgeon.co.uk/code/dbad-license
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*/
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// --------------------------------------------------------------------------
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/**
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* MySQL specific class
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*
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* @extends DB_PDO
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*/
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class MySQL extends DB_PDO {
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/**
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* Connect to MySQL Database
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*
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* @param string $dsn
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* @param string $username=null
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* @param string $password=null
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* @param array $options=array()
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*/
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public function __construct($dsn, $username=null, $password=null, $options=array())
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{
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parent::__construct("mysql:$dsn", $username, $password, $options);
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$class = __CLASS__.'_sql';
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$this->sql = new $class;
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}
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// --------------------------------------------------------------------------
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/**
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* Empty a table
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*
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* @param string $table
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*/
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public function truncate($table)
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{
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$this->query("TRUNCATE `{$table}`");
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}
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// --------------------------------------------------------------------------
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/**
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* Get databases for the current connection
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*
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* @return array
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*/
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public function get_dbs()
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{
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$res = $this->query("SHOW DATABASES");
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return array_values($this->fetchAll(PDO::FETCH_ASSOC));
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}
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// --------------------------------------------------------------------------
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/**
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* Returns the tables available in the current database
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*
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* @return array
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*/
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public function get_tables()
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{
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$res = $this->query("SHOW TABLES");
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$tables = array();
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$rows = $res->fetchAll(PDO::FETCH_NUM);
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foreach($rows as $r)
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{
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$tables[] = $r[0];
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}
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return $tables;
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}
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// --------------------------------------------------------------------------
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/**
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* Returns system tables for the current database
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*
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* @return array
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*/
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public function get_system_tables()
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{
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//MySQL doesn't have system tables
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return array();
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}
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// --------------------------------------------------------------------------
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/**
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* Return the number of rows returned for a SELECT query
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*
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* @return int
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*/
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public function num_rows()
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{
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return isset($this->statement) ? $this->statement->rowCount() : FALSE;
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}
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// --------------------------------------------------------------------------
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/**
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* Create an SQL backup file for the current database's structure
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*
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* @return string
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*/
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public function backup_structure()
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{
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// @todo Implement Backup function
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return '';
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}
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// --------------------------------------------------------------------------
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/**
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* Create an SQL backup file for the current database's data
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*
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* @return string
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*/
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public function backup_data()
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{
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// @todo Implement Backup function
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return '';
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}
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// --------------------------------------------------------------------------
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/**
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* Surrounds the string with the databases identifier escape characters
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*
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* @param string $ident
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* @return string
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*/
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public function quote_ident($ident)
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{
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if (is_array($ident))
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{
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return array_map(array($this, 'quote_ident'), $ident);
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}
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// Split each identifier by the period
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$hiers = explode('.', $ident);
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return '`'.implode('`.`', $hiers).'`';
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}
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}
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//End of mysql.php
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