来自 php 对 AJAX 调用的 JSON 响应

Question

I am doing a ajax call from java script and Im trying to get json response from php, if I set dataType as JSON, ajax error block is getting executed if not success block is getting executed, without specifying dataType if I try to console.log the response in success block I am getting nothing

JS

let CurrentDate = Date();
console.log(CurrentDate);

jsonObject = {
   'TrackName' : 'Material Science',
    'TrackDesc' : 'Test Text Test Text Test Text Test Text Test Text Test Text Test Text ',
    'Timestamp' : CurrentDate
}
console.log(jsonObject);
$.ajax({
    type:'post',
    url:'../../../../PHP/adminScripts/addNewTrack.php',
    contentType: "application/json",
    data: {trackDetails:jsonObject},
    dataType: "json",
    success: function(response) {
        console.log('SUCCESS BLOCK');
        console.log(response);
    },
    error: function(response) {
        console.log('ERROR BLOCK');
        console.log(response);
    }
});

PHP

<?php
header('Content-type: application/json');
include('../connection.php');

if($_POST) {
$obj = $_POST['trackDetails'];

$TrackName = mysql_real_escape_string($obj['TrackName']);
$TrackDesc = mysql_real_escape_string($obj['TrackDesc']);
$TrackAdderID = 'Admin ';                  //$_SESSION["userID"];
$Timestamp = mysql_real_escape_string($obj['Timestamp']);

$response_array['status'] = 'status123';
echo json_encode($response_array);

please help me figure out how to get json response to an ajax call in PHP

Answer 1

• In your JS file, remove contentType: "application/json",
• In your php file, check "include file url" and
• Close if statement block properly

JS File:

let CurrentDate = Date();
jsonObject = {
   'TrackName' : 'Material Science',
    'TrackDesc' : 'Test Text Test Text Test Text Test Text Test Text Test Text Test Text ',
    'Timestamp' : CurrentDate
}
$.ajax({
    type:'post',
    url:'addNewTrack.php',
    data: {trackDetails:jsonObject},
    dataType: "json",
    success: function(response) {
        console.log('SUCCESS BLOCK');
        console.log(response);
    },
    error: function(response) {
        console.log('ERROR BLOCK');
        console.log(response);
    }
});

PHP File:

<?php
    header('Content-type: application/json');
    include('../connection.php');

    if($_POST) {
        $obj = $_POST['trackDetails'];

        $TrackName = mysql_real_escape_string($obj['TrackName']);
        $TrackDesc = mysql_real_escape_string($obj['TrackDesc']);
        $TrackAdderID = 'Admin ';                  //$_SESSION["userID"];
        $Timestamp = mysql_real_escape_string($obj['Timestamp']);

        $response_array['status'] = 'status123';
        echo json_encode($response_array);
    }
?>

Answer 2

从您的 JS 代码中删除contentType: "application/json" ，并在 PHP 文件中正确关闭大括号，它会正常工作。

Answer 3

You can convert the PHP array in JSON format with json_encode() function and return as a response. Set dataType: 'JSON' when send AJAX request.