mConnId = mysqli_connect(MYSQL_SERVER, MYSQL_USER, MYSQL_PASSWORD,MYSQL_DATABASE,MYSQL_PORT); if (!$this->mConnId) { print " 连接数据库失败!可能是mysql数据库用户名或密码不正确!
"; return false; } } public static function getInstance() { if (null == self :: $instances) { self :: $instances = new DBAction(); self :: $instances->DBConnect(); } mysqli_query(self :: $instances->mConnId,"SET NAMES 'UTF8'"); mysqli_query(self :: $instances->mConnId,"SET SESSION time_zone = '+8:00'"); return self :: $instances; } public function query($sql) { $result = mysqli_query($this->mConnId,$sql); return $result; } //查询 public function select($sql) { $sql = trim($sql); if (empty ($sql)) {return;} $rs = $this->query($sql); if ((!$rs) || empty ($rs)) {return;} $data = array(); while ($rd = mysqli_fetch_object($rs)) { $data[] = $rd; } mysqli_free_result($rs); return $data; } //查询 public function selectOne($sql) { $sql = trim($sql); if (empty ($sql)) {return;} $rs = $this->query($sql); if ((!$rs) || empty ($rs)) {return;} $rd = mysqli_fetch_object($rs); mysqli_free_result($rs); return $rd; } //查询返回数组 public function selectarray($sql){ $sql = trim($sql); if (empty ($sql)) {return;} $rs = $this->query($sql); if ((!$rs) || empty ($rs)) {return;} $data = array(); while($row = mysqli_fetch_array($rs)) { $data[] = $row; } mysqli_free_result($rs); return $data; } //查询返回影响行 public function selectrow($sql) { $sql = trim($sql); if (empty ($sql)) {return -1;} $rs = $this->query($sql); if ((!$rs) || empty ($rs)) {return 0;} $num= mysqli_num_rows($rs); mysqli_free_result($rs); return $num; } //插入 public function insert($sql, $return = "affectedrows") { $sql = trim($sql); if (empty ($sql)) {return -1;} $rs = $this->query($sql); if ($rs == false) {return -1;} if (strtolower($return) == "last_insert_id") { return mysqli_insert_id($this->mConnId); } else { return mysqli_affected_rows($this->mConnId); } } public function insert_array($arr,$database,$xs_sql = '',$return = ''){ if(is_array($arr)){ $sql = 'insert into '.$database . '('; foreach ($arr as $key => $value) { $sql.= $key.','; } $sql = rtrim($sql, ',').') values ('; foreach ($arr as $key => $value) { if($value == 'CURRENT_TIMESTAMP'){ $sql.= $value.','; }elseif(is_array($value)){ return false; }elseif(is_object($value)){ return false; }else{ $sql.= '\''.$value.'\','; } } $sql = rtrim($sql, ',').')'; if ($xs_sql) { echo $sql; }else{ if ($return) { $res = $this->insert($sql,"last_insert_id"); }else{ $res = $this->insert($sql); } return $res; } }else{ return false; } } //更新 // return 成功，返回执行影响行数，失败，返回-1 public function update($sql) { $sql = trim($sql); if (empty ($sql)) {return -1;} $rs = $this->query($sql); if ($rs == false) {return -1;} return mysqli_affected_rows($this->mConnId); } //删除 // return 成功，返回执行影响行数，失败，返回-1 public function delete($sql) { $sql = trim($sql); if (empty ($sql)) {return -1;} $rs = $this->query($sql); if ($rs == false) {return -1;} return mysqli_affected_rows($this->mConnId); } // return 成功，返回执行影响行数，失败，返回-1 public function modify($arr,$database,$where,$xs_sql = '') { if(is_array($arr)){ $sql = 'update '.$database . ' set '; foreach ($arr as $key => $value) { if($value == 'CURRENT_TIMESTAMP'){ $sql.= $key.' = '.$value; }elseif(is_array($value)){ return false; }elseif(is_object($value)){ return false; }else{ $sql.= $key.' = \''.$value.'\','; } } $sql = rtrim($sql, ',').' where '; if($where){ $sql.= " $where"; }else{ $sql.= " 1=1"; } if ($xs_sql) { echo $sql; }else{ $res = $this->insert($sql); return $res; } }else{ return false; } } /* * 预处理插入 * $data 参数一般为数组 */ public function preInsert($sql,$data) { $mysqli_stmt=$this->mConnId->prepare($sql); $callback = array($mysqli_stmt, 'bind_param'); // 将参数类型描述加入数组 array_unshift($data, $this->getParamTypeStr($data)); call_user_func_array($callback, $this->refValues($data)); if($mysqli_stmt->execute()){ return $mysqli_stmt->insert_id; }else{ return $mysqli_stmt->error; } } public function preUpdate($sql,$data) { $mysqli_stmt=$this->mConnId->prepare($sql); $callback = array($mysqli_stmt, 'bind_param'); // 将参数类型描述加入数组 array_unshift($data, $this->getParamTypeStr($data)); call_user_func_array($callback, $this->refValues($data)); if($mysqli_stmt->execute()){ return $mysqli_stmt->affected_rows; }else{ return $mysqli_stmt->error; } } private function getParamTypeStr($data){ $count = count($data); $typestr = ""; for($i = 0; $i<$count; $i++){ $type = gettype($data[$i]); switch($type){ case "integer": $typestr.= "i"; break; case "float": case "double": $typestr.= "d"; break; case "string": $typestr.= "s"; break; } } return $typestr; } private function refValues($arr){ if (version_compare(PHP_VERSION, '5.3.0') >= 0) { $refs = array(); foreach($arr as $key => $value) $refs[$key] = &$arr[$key]; return $refs; } return $arr; } /* 无需使用 */ //使用mysql扩展查询,查询结束需手工释放结果集 public function i_query($sql) { $sql = trim($sql); if (empty ($sql)) {return false;} $rs = mysqli_query($this->mConnId, $sql); return $rs; } /*关闭连接*/ public function close() { mysqli_close($this->mConnId); } /* 事务处理函数 */ public function begin() { return $this->query("START TRANSACTION"); } public function commit() { return $this->query("COMMIT"); } public function rollback() { return $this->query("ROLLBACK"); } public function transaction($q_array) { $retval = 1; $this->begin(); foreach ($q_array as $qa) { $result = $this->query($qa); if ($result == false) { $retval = 0; break; } } if ($retval == 0) { $this->rollback(); return false; } else { $this->commit(); return true; } } // 管理员记录 function admin_record($admin_name,$event,$type){ $event = $admin_name . $event; $sql = "insert into lkt_admin_record(admin_name,event,type,add_date) values ('$admin_name','$event','$type',CURRENT_TIMESTAMP)"; $this->insert($sql); return; } } ?>