将变量从javascript通过ajax传递给php

我是jquery和ajax的新手。我在这里有一个脚本，我需要将变量传递给一个php文件。该PHP将被编码为div＃chat-body。我正尝试通过POST将接收器变量传递给load-messages.php，但出现以下错误：“未定义索引：第8行xxxx/scripts/load_messages.php中的接收器”。我认为我的语法有问题，或者我完全错了。将变量从javascript通过ajax传递给php

的script.js

$('input#send-message').on('click', function(){ 
alert("test"); 
var message = $('input#input-message').val(); 
var sender= $('input#sender').val(); 
var receiver= $('input#receiver').val(); 

    if($.trim(message)!=''){ 
     $.post('scripts/messaging.php', {message: message, sender: sender, receiver:receiver}, function(data){ 
     //output after sending message 

     });  
     //load message to chat-body div 

     $.ajax({ 
     url: 'scripts/load_messages.php', 
     type: "POST", 
     data: {receiver: receiver}, 
     success: function(data){ 
      $('#chat-body').html(data); 
      //$('#chat-body').scrollTop($('#chat-body')[0].scrollHeight); 
     } 
    }); 
    }});

负载messages.php

<?php 
    session_start(); 
    require('config.php'); 
    require('chat_functions.php'); 


$messages = get_msg($_SESSION['user_id'], $_POST['receiver']); 

foreach($messages as $message){ 
    if($message['sender'] == $_SESSION['user_id']) { 
     ?><div id = "you_message"> 

     <?php echo '<strong> You: </strong><br />'; 
     echo $message['message'].'<br /><br />';?> 
     </div><!--you_message--> 
     <?php 
    } 

    else{ 
     ?><div id="recipient_message"> 
     <?php echo '<strong>'.get_name($_POST['receiver']).'</strong><br />'; 
     echo $message['message'].'<br /><br />';?> 
     </div> <!--recipient_message --> 
     <?php 
     } 
    } 

    ?>

来源

2017-04-15 Brian Ona

显然，该变量接收器没有被传递给load-message.php –

@BrianOna：请检查我的答案，应该帮助你调试:) – OldPadawan

我认为你的代码没有问题，试着在萤火虫中调试什么键值被发布 – Javed

这只是简单的通过AJAX调用值传递给PHP文件。更改您的AJAX调用如下图所示

var message = $('#input-message').val(); 
var sender= $('#sender').val(); 
var receiver= $('#receiver').val(); 
$.ajax({ 
    url: "scripts/load_messages.php", 
    method: "post", 
    //data: { "message":$('#input-message').val(),"sender":$('#sender').val(),"receiver":$('#receiver').val()},you can pass the values directly like this or else you can store it in variables and can pass 
    data: { "message":message,"sender":sender,"receiver":receiver}, 
    success: function(data){ 
    $('#chat-body').html(data); 
    }, 
    error: function() { 
    alert('Not OKay'); 
    } 
    });

和您的负载messages.php也能像this`

$receiver = $_POST['receiver']; 
echo $receiver;

来源

2017-04-15 05:49:22

这工作！只需在接收器上添加报价。谢谢。 –

你传递一个对象，而不是一个JSON字符串：

$.ajax({ 
    type: 'POST', 
    url: 'scripts/messaging.php', 
    data: JSON.stringify ({receiver: receiver}), 
    success: function(data) { alert('data: ' + data); }, 
    contentType: "application/json", 
    dataType: 'json' 
});

来源

2017-04-15 05:10:14 tiepnv

你可以试试这个，然后适应你的需求，因为我只是让它更“基本”一点：

表单：

<form action="#" id="form" method="post"> 
<input type="text" id="sender" name="sender" /> 
<input type="text" id="receiver" name="receiver" /> 
<input type="text" id="input-message" name="input-message" /> 
<input type="submit" id="send-message" value="Post" /> 
</form> 

<div id="chat-body" class="regular"></div>

jQuery的部分：

$(document).ready(function(){ 

$("#send-message").click(function(e){ 
e.preventDefault(); /* to prevent form default action */ 

var message = $('#input-message').val(); 
var sender = $('#sender').val(); 
var receiver = $('#receiver').val(); 

    $.ajax({ 
    url: "load_messages.php", 
    method: "POST", 
    data: { message: message, sender: sender, receiver:receiver }, 
    success: function(html){ 
     alert(html); /* checking response */ 
     $('#chat-body').html(html); /* add to div chat */ 
    } 
    }); 
}); 
});

然后，load_message.php

<?php 

error_reporting(E_ALL); ini_set('display_errors', 1); 

$sender = $_POST['sender']; 
$receiver = $_POST['receiver']; 
$message = $_POST['message']; 

echo"[ $sender/$receiver/$message ]"; /* here, you can only echo $message for instance, 
then use response to append message to chat window */ 

?>

来源

2017-04-15 05:24:19 OldPadawan

将变量从javascript通过ajax传递给php

回答

相关问题