Javascript 用ajax从数据库中获取数据

我想通过ajax从数据库中获取数据，但它只给了我一条记录，而不是其他记录，但我需要数据库中的所有记录，我搜索了太多，无法理解这个问题 但我没办法

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

这就是数据库映像

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

php代码 html

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

$（函数（）
{
//-----------------------------------------------------------------------
//2）使用AJAX发送http请求http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax（{
url:'api.php'，//要调用以获取数据的脚本
数据：“”，//您可以在此处插入url argumnets以传递到api.php
//例如“id=5，父项=6”
数据类型：“json”，//数据格式
成功：函数（数据）//收到回复时
{
//var id=data[0]；//获取id
//var vname=data[1]；//获取名称
//--------------------------------------------------------------------
//3）更新html内容
//--------------------------------------------------------------------
$（'#output'）.html（“id:+id+”name:+name）；//设置输出元素html
//推荐阅读jquery选择器，它们非常棒
// http://api.jquery.com/category/selectors/
} 
});
}); 

您只能得到一行

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

您需要循环该行并继续运行，直到行用完为止（在运行时创建一个行数组数组）

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

---

然后

json\u encode

最后一个数组。

mysql\u fetch\u行只从查询结果中获取一条记录。您需要将查询结果的每一行存储在一个数组中，然后最终将该数组转换为其JSON表示形式

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

$records = [];

while( $row = mysql_fetch_row( $result ) ){
    array_push( $records, $row );
}

echo json_encode( $records );

---

将代码中的

mysql\u fetch\u行

和

json\u encode

行替换为该行来实现它。

最好的方法是使用3个不同的文件

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

• php_page.php
• script.js
• php_handler.php

在php_page.php中，您实际上拥有HTML 在script.js中，使用ajax发出请求 在php_handler.php中，您给出了响应，在那里您可以建立连接并从数据库中获取所需的所有数据

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

php_page.php

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

<!doctype html>
<html>
    <head>
        <title></title>
        <script type="text/javascript" src="script.js"></script>
    </head>
    <body>
        <ul id="list">
            <!-- In here comes the data! -->
        </ul>

        <button id="button">Get Data</button>
    </body>
</html>

获取数据

script.js

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

$(document).ready(function() {
    $("#list").on("click", function() {
        $.ajax({
            url: "php_handler.php"
        }).done(function(data){
            $(this).empty().append("<li>"+ data +"</li>");
        });
    });
});

$（文档）.ready（函数（）{
$（“#列表”）。在（“单击”，函数（）{
$.ajax({
url:“php_handler.php”
}).完成（功能（数据）{
$（this）.empty（）.append（“
”+data+”
”）；
});
});
});

php_handler.php

  <!-------------------------------------------------------------------------
  1) Create some html content that can be accessed by jquery
 -------------------------------------------------------------------------->
  <h2></h2>


  <script id="source" language="javascript" type="text/javascript">

  $(function () 
  {
//-----------------------------------------------------------------------
// 2) Send a http request with AJAX http://api.jquery.com/jQuery.ajax/
//-----------------------------------------------------------------------
$.ajax({                                      
  url: 'api.php',                  //the script to call to get data          
  data: "",                        //you can insert url argumnets here to    pass to api.php
                                   //for example "id=5&parent=6"
  dataType: 'json',                //data format      
  success: function(data)          //on recieve of reply
  {
   // var id = data[0];              //get id
  //  var vname = data[1];           //get name
    //--------------------------------------------------------------------
    // 3) Update html content
    //--------------------------------------------------------------------
    $('#output').html("<b>id: </b>"+id+"<b> name: </b>"+name); //Set output     element html
    //recommend reading up on jquery selectors they are awesome 
    // http://api.jquery.com/category/selectors/
  } 
});
 }); 

  </script>
 </body>
</html>

<?php
$con = mysqli_connect($host, $user, $pass, $db);

$query = mysqli_query($con, "SELECT [FIELD_NAME] FROM [TABLE_NAME]");

foreach($query as $data)
{
    echo '<li>' . $data . '</li>';
}
?>

警告：您正在使用，应该使用A.我仍然没有得到结果。请考虑编辑您的帖子，以添加更多关于您的代码所做的解释以及为什么它将解决问题的更多解释。一个只包含代码的答案（即使它在工作）通常不会帮助OP理解他们的问题。