我是一名自学成才的 AS3/Flex/AIR 开发人员，我已经构建了一个在 AIR 上运行的触摸屏信息亭系统，并通过在线 Flex 应用程序进行远程内容管理。
这是我第一次做服务器端的东西，所以如果需要，请随时纠正我的问题。
AIR 应用程序和 Flex 应用程序都连接到 mysql 数据库，以便使用 php 脚本和 Zend 框架进行简单的 CRUD 操作。信息亭每 30 秒调用一次服务器进行更新。
所有这些简单的服务器端 php 脚本都是由 Flash Builder 的数据向导自动生成的。我做了简单的调整（gateway.php、amf_config.ini、mysqli 连接参数）并将所有内容部署到客户端的服务器上。这是一个共享服务器类型。
现在，系统工作。但它工作缓慢。每个创建/读取/更新/删除操作都有效，但我认为它应该快得多。此外，这些操作给服务器的 cpu 带来了很大的负载。根据托管人员的说法，该系统打开的 php-cgi 进程占用了服务器 CPU 功率的 40%，这样做会减慢自身和该服务器上托管的其他站点的速度。
我的问题是：
首先，是不是一开始就有问题，或者这个性能是从 Zend 框架中扩展出来的？Flash Builder 编写的自动生成的脚本是否写得不好并且可以优化？这种系统可以保留在共享托管服务器上吗？我们是否应该迁移到 VPS 服务器以获得更好的性能？如果我使用 phpmyadmin 在 mysql 数据库上创建的表没有经过优化构建，是否会对性能产生这种影响？
我不知道php或mysql。任何形式的帮助都会非常感激。
萨尔
这是由 Flash Builder 编写的脚本： 我没有添加任何内容 - 只是更改了连接参数。
<?php
class KiosksService {
var $username = "--------";
var $password = "--------";
var $server = "--------";
var $port = "3306";
var $databasename = "--------";
var $tablename = "kiosks";
var $connection;
/**
* The constructor initializes the connection to database. Everytime a request is
* received by Zend AMF, an instance of the service class is created and then the
* requested method is invoked.
*/
public function __construct() {
$this->connection = mysqli_connect(
$this->server,
$this->username,
$this->password,
$this->databasename,
$this->port
);
$this->throwExceptionOnError($this->connection);
}
/**
* Returns all the rows from the table.
*
* Add authroization or any logical checks for secure access to your data
*
* @return array
*/
public function getAllKiosks() {
$stmt = mysqli_prepare($this->connection, "SELECT * FROM $this->tablename");
$this->throwExceptionOnError();
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
$rows = array();
mysqli_stmt_bind_result($stmt, $row->KioskID, $row->Station, $row->Branch, $row->Chain, $row->Pingdate, $row->Layout, $row->Online, $row->Clips, $row->Extra);
while (mysqli_stmt_fetch($stmt)) {
$row->Pingdate = new DateTime($row->Pingdate);
$rows[] = $row;
$row = new stdClass();
mysqli_stmt_bind_result($stmt, $row->KioskID, $row->Station, $row->Branch, $row->Chain, $row->Pingdate, $row->Layout, $row->Online, $row->Clips, $row->Extra);
}
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
return $rows;
}
/**
* Returns the item corresponding to the value specified for the primary key.
*
* Add authorization or any logical checks for secure access to your data
*
*
* @return stdClass
*/
public function getKiosksByID($itemID) {
$stmt = mysqli_prepare($this->connection, "SELECT * FROM $this->tablename where KioskID=?");
$this->throwExceptionOnError();
mysqli_stmt_bind_param($stmt, 'i', $itemID);
$this->throwExceptionOnError();
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
mysqli_stmt_bind_result($stmt, $row->KioskID, $row->Station, $row->Branch, $row->Chain, $row->Pingdate, $row->Layout, $row->Online, $row->Clips, $row->Extra);
if(mysqli_stmt_fetch($stmt)) {
$row->Pingdate = new DateTime($row->Pingdate);
return $row;
} else {
return null;
}
}
/**
* Returns the item corresponding to the value specified for the primary key.
*
* Add authorization or any logical checks for secure access to your data
*
*
* @return stdClass
*/
public function createKiosks($item) {
$stmt = mysqli_prepare($this->connection, "INSERT INTO $this->tablename (Station, Branch, Chain, Pingdate, Layout, Online, Clips, Extra) VALUES (?, ?, ?, ?, ?, ?, ?, ?)");
$this->throwExceptionOnError();
mysqli_stmt_bind_param($stmt, 'sssssisi', $item->Station, $item->Branch, $item->Chain, $item->Pingdate->toString('YYYY-MM-dd HH:mm:ss'), $item->Layout, $item->Online, $item->Clips, $item->Extra);
$this->throwExceptionOnError();
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
$autoid = mysqli_stmt_insert_id($stmt);
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
return $autoid;
}
/**
* Updates the passed item in the table.
*
* Add authorization or any logical checks for secure access to your data
*
* @param stdClass $item
* @return void
*/
public function updateKiosks($item) {
$stmt = mysqli_prepare($this->connection, "UPDATE $this->tablename SET Station=?, Branch=?, Chain=?, Pingdate=?, Layout=?, Online=?, Clips=?, Extra=? WHERE KioskID=?");
$this->throwExceptionOnError();
mysqli_stmt_bind_param($stmt, 'sssssisii', $item->Station, $item->Branch, $item->Chain, $item->Pingdate->toString('YYYY-MM-dd HH:mm:ss'), $item->Layout, $item->Online, $item->Clips, $item->Extra, $item->KioskID);
$this->throwExceptionOnError();
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
}
/**
* Deletes the item corresponding to the passed primary key value from
* the table.
*
* Add authorization or any logical checks for secure access to your data
*
*
* @return void
*/
public function deleteKiosks($itemID) {
$stmt = mysqli_prepare($this->connection, "DELETE FROM $this->tablename WHERE KioskID = ?");
$this->throwExceptionOnError();
mysqli_stmt_bind_param($stmt, 'i', $itemID);
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
}
/**
* Returns the number of rows in the table.
*
* Add authorization or any logical checks for secure access to your data
*
*
*/
public function count() {
$stmt = mysqli_prepare($this->connection, "SELECT COUNT(*) AS COUNT FROM $this->tablename");
$this->throwExceptionOnError();
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
mysqli_stmt_bind_result($stmt, $rec_count);
$this->throwExceptionOnError();
mysqli_stmt_fetch($stmt);
$this->throwExceptionOnError();
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
return $rec_count;
}
/**
* Returns $numItems rows starting from the $startIndex row from the
* table.
*
* Add authorization or any logical checks for secure access to your data
*
*
*
* @return array
*/
public function getKiosks_paged($startIndex, $numItems) {
$stmt = mysqli_prepare($this->connection, "SELECT * FROM $this->tablename LIMIT ?, ?");
$this->throwExceptionOnError();
mysqli_stmt_bind_param($stmt, 'ii', $startIndex, $numItems);
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
$rows = array();
mysqli_stmt_bind_result($stmt, $row->KioskID, $row->Station, $row->Branch, $row->Chain, $row->Pingdate, $row->Layout, $row->Online, $row->Clips, $row->Extra);
while (mysqli_stmt_fetch($stmt)) {
$row->Pingdate = new DateTime($row->Pingdate);
$rows[] = $row;
$row = new stdClass();
mysqli_stmt_bind_result($stmt, $row->KioskID, $row->Station, $row->Branch, $row->Chain, $row->Pingdate, $row->Layout, $row->Online, $row->Clips, $row->Extra);
}
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
return $rows;
}
/**
* Utility function to throw an exception if an error occurs
* while running a mysql command.
*/
private function throwExceptionOnError($link = null) {
if($link == null) {
$link = $this->connection;
}
if(mysqli_error($link)) {
$msg = mysqli_errno($link) . ": " . mysqli_error($link);
throw new Exception('MySQL Error - '. $msg);
}
}
}
?>