我的 queryScenario.php 文件加载速度太慢，平均 28 秒。我该怎么做才能通过查询和循环来减少这种情况？我不知道如何处理它，因为我对优化 PHP 几乎一无所知。
谢谢。
这是我的 queryScenario.php 文件：
<?php
include("database.php");
include("dataModel.php");
if(!isset($_SESSION))
session_start();
//$userId = 1; // This variable will be obtained from the session
$userId = $_SESSION['userIdNumber'];
//$selectedUserLandId = $_GET['id']; // This variable may be defined as a session variable
$selectedUserLandId = $_SESSION['selectedUserLandId'];
// load the related user based model tables (dynamic data)
$landLiteral = dbGetUserLandByLandId($userId, $selectedUserLandId);
if (count($landLiteral)< 1){
// TODO: Throw an exception here
}
$landLiteralSelected = $landLiteral[0];
$userLand = new Land();
$userLand->id = $landLiteralSelected["id"];
$userLand->name = $landLiteralSelected["name"];
$userLand->desc = $landLiteralSelected["description"];
$landmap = dbGetLandmapById($landLiteralSelected["id"]);
$userLand->mapimage = $landmap[0]["mapimage"];
$geopos = dbGetGeoposById($landLiteralSelected["geopos_id"]);
$userLand->lat = $geopos[0]["lat"];
$userLand->lng = $geopos[0]["lng"] ;
$userLand->type = $landLiteralSelected["landenum_id"];
$sectorsLiteral = dbGetSectorsByLandId($userLand->id);
foreach ($sectorsLiteral as $sectorLiteral){
$sector = new Sector();
$sector->id = $sectorLiteral["id"];
$sector->name = $sectorLiteral["name"];
$sector->desc = $sectorLiteral["description"];
$geoposSector = dbGetGeoposById($sectorLiteral["geopos_id"]);
$sector->lat = $geoposSector[0]["lat"];
$sector->lng = $geoposSector[0]["lng"] ;
$userLand->sectionList[] = $sector;
$devicesLiteral = dbGetDevicesBySectorId($sector->id);
foreach ($devicesLiteral as $deviceLiteral){
$device = new Device();
$device->id = $deviceLiteral["id"];
$device->sceneName = $deviceLiteral["scenename"];
$device->sceneDesc = $deviceLiteral["scenedescription"];
$mapinfoDevice = dbGetMapInfoById($deviceLiteral["mapitem_id"]);
$device->mapInfo[] = $mapinfoDevice[0];
$geoposDevice = dbGetGeoposById($deviceLiteral["geopos_id"]);
$device->lat = $geoposDevice[0]["lat"];
$device->lng = $geoposDevice[0]["lng"];
$device->type = $deviceLiteral["deviceenum_id"];
$device->serialNo = $deviceLiteral["serialNo"];
$sector->deviceList[] = $device;
// NOW THE MODULES
$modulesLiteral = dbGetDeviceModulesByDeviceType($device->type);
foreach($modulesLiteral as $moduleLiteralList){
foreach ($moduleLiteralList as $moduleLiteral){
$module = new Module();
$module->id = $moduleLiteral["id"];
$module->type = $moduleLiteral["moduleenum_id"];
$module->unit = $moduleLiteral["unit"];
$module->subid = dbGetSubIdOfModule($module->id);
$deviceStateLiteral=dbGetDeviceStates($device->id);
if (count($deviceStateLiteral) > 0){
$moduleState=new ModuleState();
$moduleState->pendingState=$deviceStateLiteral[0]["pending_state"];
$moduleState->desiredState=$deviceStateLiteral[0]["desired_state"];
$moduleState->currentState=$deviceStateLiteral[0]["current_state"];
$module->moduleState=$moduleState;
}
$moduleDataLiteral=dbGetLastDeviceModuleData($device->id,$module->id);
$moduleData=new ModuleData();
if (count($moduleDataLiteral) > 0){
$moduleData->data=$moduleDataLiteral[0]["value"]." ".$module->unit;
$moduleData->timeStamp=$moduleDataLiteral[0]["timestamp"];
}else{
$moduleData->data="Veri Yok";
$moduleData->timeStamp="Veri Yok";
}
$module->moduleData=$moduleData;
$device->moduleList[] = $module;
// NOW THE MODULE SPECS
// First, get the default specs
$specsLiteral = dbGetDefaultSpecsByModuleId($module->id);
foreach($specsLiteral as $specLiteral){
$spec = new Spec();
$spec->type = $specLiteral["specenum_id"];
$spec->editable = $specLiteral["editable"];
$spec->value = $specLiteral["default"];
// NOW LOOK FOR UPDATED SPEC FOR THIS DEVICE MODULE AND SPEC
$updatedSpecLiteral = dbGetUpdatedDeviceSpec($device->id, $module->id, $spec->type);
if ($updatedSpecLiteral){
$spec->value = $updatedSpecLiteral[0]["specvalue"];
}
$module->specList[] = $spec;
}
}
}
}
}
if(!(isset($_GET["nonEcho"]) && $_GET["nonEcho"]=="yes"))
echo json_encode($userLand);
?>
这些是数据模型：
<?php
class Node {
public $id;
}
class SpatialNode extends Node {
public $lat = 0;
public $lng = 0;
}
class Land extends SpatialNode{
public $name;
public $desc = "";
public $type;
public $sectionList = array();
public $mapimage;
}
class Sector extends SpatialNode{
public $name;
public $desc = "";
public $deviceList = array();
}
class Device extends SpatialNode{
public $sceneName;
public $sceneDesc;
public $type;
public $desc = "";
public $serialNo;
public $installationDate = "";
public $moduleList = array();
public $mapInfo = array();
}
class Module extends Node{
public $type;
public $unit = "";
public $subid;
public $specList = array();
public $moduleData;
public $moduleState;
}
class ModuleData{
public $data;
public $timeStamp;
}
class ModuleState{
public $pendingState;
public $desiredState;
public $currentState;
}
class Spec{
public $type;
public $value;
public $editable;
}
class DeviceStatus{
public $name;
public $address;
public $pendingState;
public $desiredState;
}
?>
这些是查询：
<?php
//include("dataModel.php");
function dbConnect() {
$dbhost = 'XXXXXXXX';
$dbuser = 'XXXXX';
$dbpass = 'XXXXXXXXX';
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if (!$conn) {
die('Could not connect: ' . mysql_error());
}
mysql_select_db('XXXXXXXXX', $conn);
mysql_query("SET NAMES UTF8");
return $conn;
}
function executeSQL($sql) {
$conn = dbConnect();
$values = array();
$retval = mysql_query($sql, $conn);
if (!$retval) {
die('Could not get data: ' . mysql_error());
}
while ($row = mysql_fetch_array($retval, MYSQL_ASSOC)) {
array_push($values, $row);
}
return $values;
}
function executeSQLForPersist($sql){
$conn = dbConnect();
$retval = mysql_query($sql, $conn);
return $retval;
}
function dbGetLandsByUserId($userId){
$sql = "SELECT * FROM land WHERE user_id=$userId or user_id=1 ";
return executeSQL($sql);
}
function dbGetUserLandByLandId($userId, $landId){
$sql = "SELECT * FROM land WHERE user_id=$userId AND id=$landId UNION SELECT * FROM land WHERE user_id=1 AND id=1";
return executeSQL($sql);
}
function dbGetGeoposById($geoId){
$sql = "SELECT * FROM geoposition WHERE id=$geoId";
return executeSQL($sql);
}
function dbGetLandmapById($id){
$sql = "SELECT * FROM landimages WHERE land_id=$id";
return executeSQL($sql);
}
function dbGetMapInfoById($id) {
$sql = "SELECT * FROM mapitems WHERE id=$id";
return executeSQL($sql);
}
function dbGetEnums(){
$sql = "SELECT * FROM enums";
return executeSQL($sql);
}
function dbGetSceneDevices(){
$sql = "SELECT * FROM scenedevices";
return executeSQL($sql);
}
function dbGetSectorsByLandId($landId){
$sql = "SELECT * FROM sector WHERE land_id=$landId";
return executeSQL($sql);
}
function dbGetDevicesBySectorId($sectorId){
$sql = "SELECT * FROM scenedevices WHERE sector_id=$sectorId";
return executeSQL($sql);
}
function dbGetDeviceModulesByDeviceType($deviceTypeId){
$sql = "SELECT module_id FROM devicedef WHERE deviceenum_id=$deviceTypeId";
$moduleIdsLiteral = executeSQL($sql);
$modulesLiteralList = array();
foreach ($moduleIdsLiteral as $moduleIdLiteral){
$moduleId = $moduleIdLiteral["module_id"];
$sqlModuleQuery = "SELECT * FROM module WHERE id=$moduleId";
$modulesLiteralList[] = executeSQL($sqlModuleQuery);
}
return $modulesLiteralList;
}
function dbGetDefaultSpecsByModuleId($moduleId){
$sql = "SELECT * FROM module_specs WHERE module_id=$moduleId";
return executeSQL($sql);
}
function dbGetUpdatedDeviceSpec($deviceId, $moduleId, $specId){
$sql = "SELECT * FROM deviceprefs WHERE scenedevice_id=$deviceId AND module_id=$moduleId AND specenum_id=$specId";
return executeSQL($sql);
}
function dbGetProfileLandImageByLandId($landId){
$sql = "SELECT * FROM landimages WHERE land_id=$landId AND profile=1";
return executeSQL($sql);
}
function dbGetSubIdOfModule($moduleId){
$sql = "SELECT * FROM devicedef WHERE module_id='$moduleId'";
$idLiteral = executeSQL($sql);
if(count($idLiteral) != 0) {
return $idLiteral[0]["subid"];
}
else {
return -1;
}
}
function dbGetModuleIdByModuleEnumId($moduleEnumId){
$sql = "SELECT * FROM module WHERE moduleenum_id=$moduleEnumId";
$idLiteral = executeSQL($sql);
if (count($idLiteral) == 1){
return $idLiteral[0]['id'];
}else{
return -1;
}
}
function dbGetAllDeviceModuleData($devId, $modId){
$sql = "SELECT * FROM realtimedevicedata WHERE scenedevice_id=$devId AND module_id=$modId ORDER BY timestamp LIMIT 0, 500"; //TODO.
return executeSQL($sql);
}
function dbGetLastDeviceModuleData($devId, $modId){
$sql = "SELECT * FROM realtimedevicedata WHERE scenedevice_id=$devId AND module_id=$modId ORDER BY timestamp desc limit 1";
return executeSQL($sql);
}
function dbGetLastDayDeviceModuleData($devId, $modId){
$sql = "SELECT * FROM realtimedevicedata WHERE scenedevice_id=$devId AND module_id=$modId AND timestamp>=SYSDATE()-INTERVAL 1 DAY ORDER BY timestamp";
return executeSQL($sql);
}
function dbGetIntervalDeviceModuleData($devId, $modId, $startDate, $endDate){
$sql = "SELECT * FROM realtimedevicedata WHERE scenedevice_id=$devId AND module_id=$modId AND timestamp>='$startDate' AND timestamp<='$endDate' ORDER BY timestamp";
return executeSQL($sql);
}
function dbGetDeviceStates($devId) {
$sql = "SELECT * FROM deviceprefs WHERE scenedevice_id=$devId";
return executeSQL($sql);
}
function dbGetAllDeviceStates($imei) {
$sql = "SELECT scenedevices.scenename, scenedevices.serialNo, deviceprefs.pending_state, ".
"deviceprefs.desired_state FROM scenedevices, deviceprefs ".
"WHERE scenedevices.parentId = '".$imei."' AND scenedevices.id = deviceprefs.scenedevice_id ";
return executeSQL($sql);
}
?>