Php json编码的格式输出

我使用ajax、php和json从mysql数据库检索信息

我的代码如图所示

<?php

$host = "localhost"; //replace with your hostname 
$username = "Practical4"; //replace with your username 
$password = "1234"; //replace with your password 
$db_name = "Practical4"; //replace with your database

$con = mysql_connect("$host", "$username", "$password") or die("cannot connect"); 
mysql_select_db("$db_name") or die("cannot select DB");

$sql = "select * from comment where name='$name'"; //replace emp_info with your table name 
$result = mysql_query($sql);
$json = array();

if (mysql_num_rows($result)) {
    while ($row = mysql_fetch_row($result)) {
        $json['comment'][] = $row;
    }
}

mysql_close($con);
echo json_encode($json); 

?>

我想将结果重新格式化为只逐行显示每个注释的内容，如：

this is comment one
this is comment two

---

你知道怎么做吗？

那么，与其做json_编码，不如直接回显注释行，或者只在一个数组中捕获所有注释行，然后对该数组执行内爆，如下所示

<?php
$host="localhost"; //replace with your hostname 
$username="Practical4"; //replace with your username 
$password="1234"; //replace with your password 
$db_name="Practical4"; //replace with your database 
$con=mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");
$sql = "select * from comment where name='$name'"; //replace emp_info with your table name 
$result = mysql_query($sql);
$json = array();
if(mysql_num_rows($result)){
    while($row=mysql_fetch_row($result)){
        //$json['comment'][]=$row;
        echo $row[1];
    }
}
mysql_close($con);

?> 

或

---

如果在ajax调用中没有提到

数据类型

success:function(data)
{
        data = $.parseJSON(data);
        var response;
        $.each(data.comment, function(index, value){
             response += value+'<br />';
        });
        $('#your_div_id').html(response);
}

你可以试试这个

foreach($json['comment'] as $key=>$arr)
{
   echo $arr[1]."<br/>";
}

foreach（$json['comment']as$key=>$arr）
{
echo$arr[1]。“
”；
}

您想在哪里进行格式化

以PHP为例（为什么使用JSON编码？）

---

检查该列是否为require data列，使用key=>value对映射仅存储所需数据，如下所示：

{"comment":[["42","this is comment one","National Hotel"],["43","this is comment one","National Hotel"],["44","this is comment two","National Hotel"],["45","this is comment two","National Hotel"]]}

<?php
$host="localhost"; //replace with your hostname 
$username="Practical4"; //replace with your username 
$password="1234"; //replace with your password 
$db_name="Practical4"; //replace with your database 
$con=mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");
$sql = "select * from comment where name='$name'"; //replace emp_info with your table name 
$result = mysql_query($sql);
$json = array();
if(mysql_num_rows($result)){
 while($row=mysql_fetch_row($result)){
   if(column_no == 2)        // Check the column only for demo 
   $json['comment']['message']=$row;
 }
}
mysql_close($con);
echo json_encode($json); 

?> 

---

等等..应该在哪里重新格式化？在php页面中，还是在发送ajax请求的页面中？

foreach($json['comment'] as $key=>$arr)
{
   echo $arr[1]."<br/>";
}

foreach(json_decode($json)->comment as $item)
{
    echo $item[1] . PHP_EOL;
}

<?php
$host="localhost"; //replace with your hostname 
$username="Practical4"; //replace with your username 
$password="1234"; //replace with your password 
$db_name="Practical4"; //replace with your database 
$con=mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");
$sql = "select * from comment where name='$name'"; //replace emp_info with your table name 
$result = mysql_query($sql);
$json = array();
if(mysql_num_rows($result)){
 while($row=mysql_fetch_row($result)){
   if(column_no == 2)        // Check the column only for demo 
   $json['comment']['message']=$row;
 }
}
mysql_close($con);
echo json_encode($json); 

?> 

    $.each(data.comment, function(index, value){
         console.log(value.message)
    });