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<?php |
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namespace Data; |
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class SQLDataSet extends DataSet |
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{ |
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protected $pdo; |
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public function __construct($params) |
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{ |
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if(isset($params['user'])) |
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{ |
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$this->pdo = new \PDO($params['dsn'], $params['user'], $params['pass']); |
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} |
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else |
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{ |
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$this->pdo = new \PDO($params['dsn']); |
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} |
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} |
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/** |
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* Get the number of rows affected by the query |
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* |
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* @param string $sql The SQL string |
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* |
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* @return integer The number of rows affected by the query |
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*/ |
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private function _get_row_count_for_query($sql) |
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{ |
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$stmt = $this->pdo->query($sql); |
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if($stmt === false) |
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{ |
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return 0; |
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} |
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$count = $stmt->rowCount(); |
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if($count === 0) |
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{ |
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$array = $stmt->fetchAll(); |
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$count = count($array); |
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} |
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return $count; |
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} |
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function _tableExistsNoPrefix($name) |
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{ |
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if($this->_get_row_count_for_query('SHOW TABLES LIKE '.$this->pdo->quote($name)) > 0) |
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{ |
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return true; |
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} |
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else if($this->_get_row_count_for_query('SELECT * FROM sqlite_master WHERE name LIKE '.$this->pdo->quote($name)) > 0) |
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{ |
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return true; |
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} |
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return false; |
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} |
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function _tableExists($name) |
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{ |
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if($this->_get_row_count_for_query('SHOW TABLES LIKE '.$this->pdo->quote('tbl'.$name)) > 0) |
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{ |
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return true; |
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} |
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else if($this->_get_row_count_for_query('SELECT * FROM sqlite_master WHERE name LIKE '.$this->pdo->quote('tbl'.$name)) > 0) |
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{ |
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return true; |
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} |
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return false; |
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} |
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function _viewExists($name) |
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{ |
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if($this->_get_row_count_for_query('SHOW TABLES LIKE '.$this->pdo->quote('v'.$name)) > 0) |
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{ |
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return true; |
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} |
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else if($this->_get_row_count_for_query('SELECT * FROM sqlite_master WHERE name LIKE '.$this->pdo->quote('v'.$name)) > 0) |
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{ |
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return true; |
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} |
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return false; |
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} |
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function tableExists($name) |
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{ |
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if($this->_tableExists($name)) |
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{ |
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return true; |
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} |
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if($this->_tableExistsNoPrefix($name)) |
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{ |
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return true; |
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} |
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if($this->_viewExists($name)) |
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{ |
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return true; |
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} |
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return false; |
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} |
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function getTable($name) |
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{ |
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if($this->_tableExists($name)) |
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{ |
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return new SQLDataTable($this, 'tbl'.$name); |
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} |
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if($this->_viewExists($name)) |
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{ |
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return new SQLDataTable($this, 'v'.$name); |
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} |
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if($this->_tableExistsNoPrefix($name)) |
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{ |
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return new SQLDataTable($this, $name); |
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} |
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throw new \Exception('No such table '.$name); |
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} |
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/** |
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* @param array $sort The array to sort by or false to not sort |
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*/ |
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private function getOrderByClause($sort) |
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{ |
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if(empty($sort)) |
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{ |
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return false; |
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} |
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$sql = ' ORDER BY '; |
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$tmp = array(); |
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foreach($sort as $sort_col=>$dir) |
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{ |
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array_push($tmp, $sort_col.' '.($dir === 1 ? 'ASC' : 'DESC')); |
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} |
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$sql .= implode($tmp, ','); |
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return $sql; |
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} |
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private function getLimitClause($count, $skip) |
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{ |
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if($count === false) |
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{ |
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return false; |
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} |
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$count = intval($count); |
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if($skip !== false) |
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{ |
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$skip = intval($count); |
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return " LIMIT $skip, $count"; |
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} |
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return ' LIMIT '.$count; |
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} |
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/** |
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* Read data from the specified SQL table |
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* |
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* @param string $tablename The name of the table to read from |
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* @param string $where The where caluse of the SQL statement |
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* @param string $select The colums to read |
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* @param string $count The number of rows to read |
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* @param string $skip The number of rows to skip over |
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* @param array $sort The array to sort by or false to not sort |
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* |
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* @return array An array of all the returned records |
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*/ |
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public function read($tablename, $where = false, $select = '*', $count = false, $skip = false, $sort = false) |
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{ |
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if($select === false) |
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{ |
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$select = '*'; |
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} |
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$sql = "SELECT $select FROM $tablename"; |
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if($where !== false) |
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{ |
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$sql .= ' WHERE '.$where; |
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} |
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$tmp = $this->getLimitClause($count, $skip) |
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if($tmp !== false) |
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{ |
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$sql .= $tmp; |
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} |
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$tmp = $this->getOrderByClause($sort); |
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if($tmp !== false) |
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{ |
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$sql .= $tmp; |
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} |
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$stmt = $this->pdo->query($sql, \PDO::FETCH_ASSOC); |
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if($stmt === false) |
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{ |
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return false; |
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} |
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$ret = $stmt->fetchAll(); |
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if($ret === false || empty($ret)) |
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{ |
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return false; |
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} |
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return $ret; |
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} |
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function update($tablename, $where, $data) |
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{ |
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$set = array(); |
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if(is_object($data)) |
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{ |
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$data = (array)$data; |
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} |
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$cols = array_keys($data); |
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$count = count($cols); |
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for($i = 0; $i < $count; $i++) |
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{ |
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array_push($set, $cols[$i].'='.$this->pdo->quote($data[$cols[$i]])); |
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} |
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$set = implode(',', $set); |
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$sql = "UPDATE $tablename SET $set WHERE $where"; |
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if($this->pdo->exec($sql) === false) |
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{ |
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return false; |
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} |
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return true; |
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} |
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function create($tablename, $data) |
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{ |
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$set = array(); |
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if(is_object($data)) |
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{ |
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$data = (array)$data; |
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} |
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$cols = array_keys($data); |
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$count = count($cols); |
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for($i = 0; $i < $count; $i++) |
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{ |
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array_push($set, $this->pdo->quote($data[$cols[$i]])); |
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} |
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$cols = implode(',', $cols); |
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$set = implode(',', $set); |
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$sql = "INSERT INTO $tablename ($cols) VALUES ($set);"; |
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if($this->pdo->exec($sql) === false) |
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{ |
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return false; |
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} |
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return true; |
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} |
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function delete($tablename, $where) |
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{ |
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$sql = "DELETE FROM $tablename WHERE $where"; |
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if($this->pdo->exec($sql) === false) |
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{ |
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return false; |
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} |
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return true; |
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} |
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function raw_query($sql) |
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{ |
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$stmt = $this->pdo->query($sql, \PDO::FETCH_ASSOC); |
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if($stmt === false) |
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{ |
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return false; |
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} |
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$ret = $stmt->fetchAll(); |
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return $ret; |
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} |
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} |
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/* vim: set tabstop=4 shiftwidth=4 expandtab: */ |
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Adding explicit visibility (
private
,protected
, orpublic
) is generally recommend to communicate to other developers how, and from where this method is intended to be used.