+ $old_fields = self::select($table, array(), $condition, array('limit' => 1));
+
+ if (is_bool($old_fields)) {
+ if ($do_insert) {
+ $values = array_merge($condition, $fields);
+ return self::insert($table, $values, $do_insert);
+ }
+ $old_fields = array();
+ }
+ }
+
+ $do_update = (count($old_fields) == 0);
+
+ foreach ($old_fields AS $fieldname => $content) {
+ if (isset($fields[$fieldname])) {
+ if ($fields[$fieldname] == $content) {
+ unset($fields[$fieldname]);
+ } else {
+ $do_update = true;
+ }
+ }
+ }
+
+ if (!$do_update || (count($fields) == 0)) {
+ return true;
+ }
+
+ $sql = "UPDATE `".$table."` SET `".
+ implode("` = ?, `", array_keys($fields))."` = ?".$condition_string;
+
+ $params1 = array_values($fields);
+ $params2 = array_values($condition);
+ $params = array_merge_recursive($params1, $params2);
+
+ return self::e($sql, $params);
+ }
+
+ /**
+ * @brief Select rows from a table
+ *
+ * @param string $table Table name
+ * @param array $fields array of selected fields
+ * @param array $condition array of fields for condition
+ * @param array $params array of several parameters
+ *
+ * @return boolean|object If "limit" is equal "1" only a single row is returned, else a query object is returned
+ *
+ * Example:
+ * $table = "item";
+ * $fields = array("id", "uri", "uid", "network");
+ *
+ * $condition = array("uid" => 1, "network" => 'dspr');
+ * or:
+ * $condition = array("`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr');
+ *
+ * $params = array("order" => array("id", "received" => true), "limit" => 1);
+ *
+ * $data = dba::select($table, $fields, $condition, $params);
+ */
+ public static function select($table, array $fields = [], array $condition = [], array $params = [])
+ {
+ if ($table == '') {
+ return false;
+ }
+
+ if (count($fields) > 0) {
+ $select_fields = "`".implode("`, `", array_values($fields))."`";
+ } else {
+ $select_fields = "*";
+ }
+
+ $condition_string = self::buildCondition($condition);
+
+ $param_string = '';
+ $single_row = false;
+
+ if (isset($params['order'])) {
+ $param_string .= " ORDER BY ";
+ foreach ($params['order'] AS $fields => $order) {
+ if (!is_int($fields)) {
+ $param_string .= "`".$fields."` ".($order ? "DESC" : "ASC").", ";
+ } else {
+ $param_string .= "`".$order."`, ";
+ }
+ }
+ $param_string = substr($param_string, 0, -2);
+ }
+
+ if (isset($params['limit']) && is_int($params['limit'])) {
+ $param_string .= " LIMIT ".$params['limit'];
+ $single_row = ($params['limit'] == 1);
+ }
+
+ if (isset($params['limit']) && is_array($params['limit'])) {
+ $param_string .= " LIMIT ".intval($params['limit'][0]).", ".intval($params['limit'][1]);
+ $single_row = ($params['limit'][1] == 1);
+ }
+
+ if (isset($params['only_query']) && $params['only_query']) {
+ $single_row = !$params['only_query'];
+ }
+
+ $sql = "SELECT ".$select_fields." FROM `".$table."`".$condition_string.$param_string;
+
+ $result = self::p($sql, $condition);
+
+ if (is_bool($result) || !$single_row) {
+ return $result;
+ } else {
+ $row = self::fetch($result);
+ self::close($result);
+ return $row;
+ }