Ajax Post to PHP returning empty array

Question

I need to pass a json object from JS to PHP, and it will pass, but the result is an empty array.

Ajax request in 'adopt.php':

var info = JSON.stringify(filteredArray);
$.ajax({
    type: 'POST',
    url: 'ajax.php',
    data: {'info': info},
    success: function(data){
        console.log(data);
    }
});

ajax.php code:

if(isset($_POST['info'])){
    $_SESSION['array'] = $_POST['info'];
}

back in adopt.php, later:

if(isset($_SESSION['array'])){
    $arr = $_SESSION['array'];
    echo "console.log('information: ' + $arr);";
}

in both of the console.logs, it returns an empty object. Does anybody know what could be causing this? (i've tried just passing the json without stringifying it, but it throws a jquery error whenever i do this.)

1) ajax.php does not have any response body so data will always be empty. 2) You'd need to reload adopt.php in order for it to pick up any changes in $_SESSION — Phil
– Phil, Commented Apr 17, 2018 at 5:10

csb · Accepted Answer · 2018-04-17 07:02:39Z

2

Try below code i think you miss return ajax response

adopt.php

<script>
var info = JSON.stringify(filteredArray);

$.ajax({
    type: 'POST',
    url: 'ajax.php',
    data: {info: info},
    success: function(data){
        console.log(data);
    }
});
</script>

ajax.php

if (isset($_POST['info'])) {
    $_SESSION['array'] = $_POST['info'];
    echo json_encode(["result" => "success"]);
}

edited Apr 17, 2018 at 7:02

csb

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answered Apr 17, 2018 at 5:13

Aman Kumar

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Comments

Annapurna · Accepted Answer · 2018-04-17 09:21:16Z

1

To get the response data from PHP, you need to echo your data to return it to the browser.

In your ajax.php:

if (isset($_POST['info'])) {
    $_SESSION['array'] = $_POST['info'];
    echo json_encode(['result' => $_SESSION['array']]);
}

answered Apr 17, 2018 at 9:21

Annapurna

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1 Comment

ceretello Over a year ago

Thanks for the answer, it's returning the object back now. :)

akhil · Accepted Answer · 2018-04-17 06:21:58Z

0

Your ajax.php is not returning any data.To get data at the time of success you need to echo the data you want to display on success of your ajax.

answered Apr 17, 2018 at 6:21

akhil

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