我有這段代碼,現在我想將這個$ _SESSION ['roll_id']變量發送到另一個頁面menu.php,其中寫入ajax函數。我如何發送這個變量到另一個Ajax頁面來設置數據。如何將數據從一個php頁面發送到ajax頁面
這是login.php頁面。
if($row["Login_Id"]==$username and $row["Login_Pass"]==$password)
{
echo "<h2 align='center'>" ."Login Sucessfull welcome" ." " .$row["Login_Id"]
."</h2>" ;
$_SESSION['roll_id']=$row['Roll_Id'];
//echo "ID" .$_SESSION['roll_id']; (give roll id)
header("Location: menu.php");
}
else
{
echo "<h2 align='center'>" ."Login Failed" ."</h2>";
}
這是menu.php頁面,其中整個功能被寫入。我想從這個頁面發送rollid到submenu.php,我可以在sql查詢中使用這個卷ID。
<?php
session_start();
$session = $_SESSION['roll_id'];
?>
<html>
<head>
<link href="menu_style.css" type="text/css" rel="stylesheet"/>
<script
src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js">
</script>
<script type="text/javascript">
$(document).ready(function(){
var rollid = '<?php json_encode($session); ?>';
$.ajax
({
type:'post',
url:'submenu.php',
data:{"roll_id":rollid},
success:function(response)
{
//console.log(response);
var menuArray= JSON.parse(response);
var html ="";
$.each(menuArray, function(key, value)
{
html += "<li><a href=''>" + value.Menu_Name + "</a>";
if(value.subMenu.length > 0)
{
console.log(JSON.stringify(value.subMenu));
html += "<ul>";
$.each(value.subMenu, function(key, subValue)
{
html += "<li><a href=''>" + subValue.text + "</a></li>";
});
html += "</ul>";
}
html += "</li>";
});
console.log(html);
if(response!="")
{
$("#main_menu").html(html);
}
}
});
});
這是submenu.php頁
<?php
session_start();
include('config.php');
$roll_id = $_POST['roll_id'];
$q="select a.Roll_Id, a.Menu_Id, b.Menu_Name, b.Menu_URL,b.Menu_Level,
b.MainMenu_ID, b.Menu_Order, b.Account_id,b.is_deleted from roll_menu AS a
join menu AS b on a.Menu_Id=b.Menu_Id and a.Roll_Id=".$roll_id;
$menu = mysqli_query($conn, $q);
$mainMenu = array();
foreach($menu as $x=>$value)
{
if($value['MainMenu_ID']==0)
$mainMenu[]=$value;
}
$menuData= array();
foreach($mainMenu as $y=>$value1)
{
$subMenu= array();
$m=$mainMenu[$y]['Menu_Id'];
$q1="select a.Roll_Id, a.Menu_Id, b.Menu_Name, b.Menu_URL,
b.Menu_Level, b.MainMenu_ID, b.Menu_Order, b.Account_id,
b.is_deleted from roll_menu AS a join menu AS b on
a.Menu_Id=b.Menu_Id and a.Roll_Id=".$roll_id."and b.MainMenu_ID=$m";
$menu1 = mysqli_query($conn, $q1);
while($row=mysqli_fetch_array($menu1))
{
if($row["MainMenu_ID"]==$m)
{
$subMenu[]=array("text"=>$row["Menu_Name"]);
}
}
$value1["subMenu"] = $subMenu;
$menuData[] = $value1;
}
$menuDataJSON = json_encode($menuData);
echo $menuDataJSON;
現在我附上submenu.php頁面的全部代碼。
什麼錯誤,你在上面的代碼中得到些什麼?在「menu.php」頁面中會話變量的內容是什麼? –
VM374:2 Uncaught SyntaxError:意外的標記<位於JSON位置2 at JSON.parse() at Object.success(menu.php:20) at i(jquery.min。js:2) at XMLHttpRequest的A(jquery.min.js:4) 上的Object.fireWith [as resolveWith](jquery.min.js:2) 。 (jquery.min.js:4) –
你可以直接用'submenu.php'調用會話。爲什麼通過ajax? – prasanth