所以我试图从javascript调用php方法，这样我就可以查询数据库并将结果输入到我的js功能中。目前，我的ajax中的'console.log(output)只是输出：
"array (size=1)
'action' => string 'getResults' (length=10)'"
不确定为什么要这样做，它应该返回查询结果，这只是数据库中的一个条目。任何人都有任何想法？欢迎任何帮助！感谢。
我的Javascript文件的一部分：
function callPHP() {
$.ajax ({
type: "GET",
datatype: "application/json",
url: "BaseClass.php",
data: { action : 'getResults' },
//error: function(err){console.log(err)},
success: function(output) {
console.log(output);
//alert(output);
}
//error, function(err){console.log(err)}
});
}
callPHP();
BaseClass.php：
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
require("Conn.php");
require("MySQLDao.php");
$param=$_REQUEST['action'];
echo var_dump($_GET);
/*
$handle = fopen("php://input", "rb");
$param = '';
while (!feof($handle)) {
$param .= fread($handle, 8192);
}
fclose($handle);
*/
if (empty($param))
{
$returnValue["status"] = false;
$returnValue["title"] = "Error";
$returnValue["message"] = "No Data Recieved paige" .$param ."...";
echo json_encode($returnValue);
return;
}
else
{
$dao = new MySQLDao();
if ($dao->openConnection() == false)
{
$returnValue["status"] = false;
$returnValue["title"] = "Error";
$returnValue["message"] = "Connection Could Not Be Established Between Server And Database";
echo json_encode($returnValue);
}
else
{
//Decodes data, dont change
$body = json_decode($param, true);
$recieved = $body["data"];
//Gets the result of a query
//$result = $dao->MySQLDaoMethodName(parameters);
//Return the result of the query
//echo json_encode($result);
}
$dao->closeConnection();
return;
}
?>
Conn.php - 这是所有连接信息，*出于保密原因* *
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
class Conn
{
public static $dbhost = "***";
public static $dbname = "***";
public static $dbuser = "***";
public static $dbpass = "***";
}
?>
MySQLDao.php - 此文件包含查询：
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
//Class for holding queries
class MySQLDao
{
var $dbhost = null;
var $dbuser = null;
var $dbpass = null;
var $mysqli = null;
var $dbname = null;
var $result = null;
//constructor
function __construct()
{
$this->dbhost = Conn::$dbhost;
$this->dbuser = Conn::$dbuser;
$this->dbpass = Conn::$dbpass;
$this->dbname = Conn::$dbname;
}
//Attempt a connection to the database
public function openConnection()
{
//Try and connect to the database
$this->mysqli = new mysqli($this->dbhost, $this->dbuser, $this->dbpass, $this->dbname);
//If the connection threw an error, report it
if (mysqli_connect_errno())
{
return false;
}
else
{
return true;
}
}
//Get method for retrieving the database conection
public function getConnection()
{
return $this->mysqli;
}
//Close the connection to the database
public function closeConnection()
{
//If there is a connection to the database then close it
if ($this->mysqli != null)
$this->mysqli->close();
}
//-----------------------------------QUERY METHODS-------------------------------------
public function getResults($data)
{
$sql = "SELECT room.room_description FROM room WHERE room.room_id = 1";
$result = $this->mysqli->query($sql);
//if (mysql_num_rows($result) == 1) {
// $obj = mysql_fetch_object($result, 'obResults');
//}
echo json_encode($result);
echo($result);
}
}
?>
答案 0 :(得分：0)
我认为你误解了如何在javscript和php之间发送数据。
答案 1 :(得分：0)
输出是echo var_dump($_GET);我确定。我可以告诉我，因为输出格式是var_dump类型。并且代码的成功部分没有任何输出。我的意思是在这部分else { //Decodes data, dont change ...中输出已被注释掉。
我注意到你正在使用MySqli，但有些方法是MySql api，就像这部分代码一样
//if (mysql_num_rows($result) == 1) {
// $obj = mysql_fetch_object($result, 'obResults');
//}
我认为这段代码不完整，处于调试阶段，因为我可以看到许多不完整的方法和函数调用。
同时尝试使用预备持有人的准备好的陈述来保障安全。
在API输出之前使用ob_clean()是一个好习惯，因为任何额外的字符都会破坏输出数据和格式。但是，您不会看到错误。有一些有用的API测试工具，如Browsers Rest Client扩展。调试的最佳方法是调试工具和框架，如x-debug。
对您的代码进行以下更改。希望这有帮助！
<强> BaseClass.php：
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
require("Conn.php");
require("MySQLDao.php");
$param=$_REQUEST['action'];
// echo var_dump($_GET);
/*
$handle = fopen("php://input", "rb");
$param = '';
while (!feof($handle)) {
$param .= fread($handle, 8192);
}
fclose($handle);
*/
if (empty($param))
{
$returnValue["status"] = false;
$returnValue["title"] = "Error";
$returnValue["message"] = "No Data Recieved paige" .$param ."...";
ob_clean();
echo json_encode($returnValue);
exit();
}
else
{
$dao = new MySQLDao();
if ($dao->openConnection() == false)
{
$returnValue["status"] = false;
$returnValue["title"] = "Error";
$returnValue["message"] = "Connection Could Not Be Established Between Server And Database";
//Clean up before output
ob_clean();
echo json_encode($returnValue);
exit();
}
else
{
//Decodes data, dont change
$body = json_decode($param, true);
$recieved = $body["data"];
//Gets the result of a query
$result = $dao->getResults($recieved);
//Close connection as fast as possible
$dao->closeConnection();
//Return the result of the query
ob_clean();
echo json_encode($result);
exit();
}
}
?>
<强> MySQLDao.php
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
//Class for holding queries
class MySQLDao
{
var $dbhost = null;
var $dbuser = null;
var $dbpass = null;
var $mysqli = null;
var $dbname = null;
var $result = null;
//constructor
function __construct()
{
$this->dbhost = Conn::$dbhost;
$this->dbuser = Conn::$dbuser;
$this->dbpass = Conn::$dbpass;
$this->dbname = Conn::$dbname;
}
//Attempt a connection to the database
public function openConnection()
{
//Try and connect to the database
$this->mysqli = new mysqli($this->dbhost, $this->dbuser, $this->dbpass, $this->dbname);
//If the connection threw an error, report it
if (mysqli_connect_errno())
{
return false;
}
else
{
return true;
}
}
//Get method for retrieving the database conection
public function getConnection()
{
return $this->mysqli;
}
//Close the connection to the database
public function closeConnection()
{
//If there is a connection to the database then close it
if ($this->mysqli != null)
$this->mysqli->close();
}
//-----------------------------------QUERY METHODS-------------------------------------
public function getResults($data)
{
$sql = "SELECT room.room_description FROM room WHERE room.room_id = ?";
$stsm = $this->mysqli->prepare($sql);
$stsm->bind_param('i',1);
$result = $stmt->execute();
if (mysqli_num_rows($result) == 1) {
$obj = mysqli_fetch_object($result, 'obResults');
return $obj;
}
return false;
}
}
?>