使用json数据类型和Ajax从php文件中检索内容

Question

I have used ajax post with datatype json to fetch content from a php file and display. But I'm new to json and I was unable to get content from the php file. only numeric value is fetched. Here is the code I'm using

var jqxhr = $.ajax({
  type: 'POST',
  url: 'events_fetch.php',
  data: {eventID:calEvent.id,action:'LOAD_SINGLE_EVENT_BASED_ON_EVENT_ID'},
  dataType: 'json'
})
.done(function(ed) { 
  alert(ed);
});

I used the above function to get content from the php file and alerted. But alert not working.Kindly guide what iam doing wrong.Here is my php code

events_fetch.php

$eventID= mysql_real_escape_string($_REQUEST["eventID"]);
$qry="SELECT * FROM `events` WHERE `id`='$eventID'";
$res=mysql_query($qry);
$fetch=mysql_fetch_array($res);

$strtdate=$fetch['start-date'];
$strttime=$fetch['start-time'];


$retValue=array($strtdate,$strttime);
echo $retValue;

Answer 1

edit your events_fetch.php as below

$eventID= mysql_real_escape_string($_REQUEST["eventID"]);
$qry="SELECT * FROM `events` WHERE `id`='$eventID'";
$res=mysql_query($qry);
$fetch=mysql_fetch_array($res);

$strtdate=$fetch['start-date'];
$strttime=$fetch['start-time'];


$retValue=array($strtdate,$strttime);
echo json_encode($retValue);

Answer 2

您必须在输出上应用json_encode函数：

echo json_encode($retValue);