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<?php |
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/** |
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* @package Framework\DB |
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* @author Anton Romanov |
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* @copyright Copyright (c) 2015-2016, Anton Romanov |
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* @link http://cadmium-cms.com |
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*/ |
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namespace { |
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abstract class DB { |
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private static $link = null, $last = null, $log = [], $time = 0; |
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/** |
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* Connect to a database |
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*/ |
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public static function connect(string $server, string $user, string $password, string $name) { |
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# Establish connection |
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// Ignore error to avoid warning when trying to connect to unavailable host |
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if (false === ($link = @mysqli_connect($server, $user, $password))) throw new Exception\DBConnect; |
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# Set encoding |
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if (!mysqli_query($link, "SET character_set_client = 'utf8'")) throw new Exception\DBCharset; |
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if (!mysqli_query($link, "SET character_set_results = 'utf8'")) throw new Exception\DBCharset; |
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if (!mysqli_query($link, "SET collation_connection = 'utf8_general_ci'")) throw new Exception\DBCharset; |
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# ------------------------ |
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self::$link = $link; self::name($name); |
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} |
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/** |
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* Select a database |
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*/ |
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public static function name(string $name) { |
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if (!mysqli_select_db(self::$link, $name)) throw new Exception\DBSelect; |
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} |
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/** |
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* Send a query |
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* |
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* @return DB\Result|false : the result object or false on failure |
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*/ |
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public static function send(string $query) { |
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if (null === self::$link) return (self::$last = false); |
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$time = microtime(true); $result = mysqli_query(self::$link, $query); $time = (microtime(true) - $time); |
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self::$last = new DB\Result(self::$link, $result, $query, $time); |
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self::$log[] = self::$last; self::$time += $time; |
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# ------------------------ |
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return self::$last; |
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} |
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/** |
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* Send a select query |
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* |
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* @param $table a table name |
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* @param $selection a string or an array where each value is a field name |
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* @param $condition a string or an array where each key is a field name and each value is a field value |
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* @param $order a string or an array where each key is a field name and each value is a sorting direction (ASC or DESC) |
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* @param $limit a maximum number of rows to be selected |
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* |
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* @return DB\Result|false : the result object or false on failure |
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*/ |
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public static function select(string $table, $selection, $condition = null, $order = null, int $limit = 0) { |
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return self::send(new DB\Query\Select(...func_get_args())); |
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} |
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/** |
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* Send an insert query |
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* |
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* @param $table a table name |
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* @param $set an array where each key is a field name and each value is a field value, or an array of such arrays |
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* @param $multiple tells that the set must be interpreted as a multi-dimensional array (for multi-row inserts) |
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* @param $ignore tells to ignore insert errors, such as a duplicate-key error |
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* |
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* @return DB\Result|false : the result object or false on failure |
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*/ |
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public static function insert(string $table, array $set, bool $multiple = false, bool $ignore = false) { |
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return self::send(new DB\Query\Insert(...func_get_args())); |
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} |
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/** |
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* Send an update query |
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* |
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* @param $table a table name |
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* @param $set an array where each key is a field name and each value is a field value |
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* @param $condition a string or an array where each key is a field name and each value is a field value |
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* |
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* @return DB\Result|false : the result object or false on failure |
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*/ |
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public static function update(string $table, array $set, $condition = null) { |
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return self::send(new DB\Query\Update(...func_get_args())); |
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} |
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/** |
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* Send a delete query |
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* |
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* @param $table a table name |
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* @param $condition a string or an array where each key is a field name and each value is a field value |
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* |
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* @return DB\Result|false : the result object or false on failure |
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*/ |
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public static function delete(string $table, $condition = null) { |
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return self::send(new DB\Query\Delete(...func_get_args())); |
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} |
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/** |
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* Get the last result object |
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* |
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* @return DB\Result|false|null : the result object or false if the last query failed or null if there have been no queries sent |
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*/ |
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public static function getLast() { |
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return self::$last; |
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} |
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/** |
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* Get the array of all the result objects |
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*/ |
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public static function getLog() : array { |
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return self::$log; |
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} |
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/** |
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* Get the total time of all the queries sent |
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*/ |
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public static function getTime() : string { |
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return number_format(self::$time, 10); |
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} |
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} |
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} |
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This check looks from parameters that have been defined for a function or method, but which are not used in the method body.