PHP / Javascript variable passing -- unexpected results

Question

I am calling a php page (using PHP7.0) from javascript (on Chrome Version 67.0.3396.99). Reading around the web, I used a code example. Passing a json string through PUT to php is supposed to deliver a $_POST variable that is a map.

{"a":"A","b":"B","c":"C"} becomes

$_POST = [  "a" => "A", "b" => "B", "c"=>"C" ]

However, in my code below, javascript passed instead

$_POST = [ "{"a":"A","b":"B","c":"C"}" : "" ]

This is bizarre. If not a map, I would have expected a String

Did I do something wrong? This is a little nerve-wracking to think the code is unreliable for production. Or perhaps there is a better approach?

javascript:

function testeroo(){

    json_ = '{"a":"A","b":"B","c":"C"}'

    jQuery.ajax({
        type: "POST",
        url: './test.php',
        data: json_,
        success: function (obj) {
            alert(obj);  
        },
        error: function () {
            alert("ERROR testeroo");
        }
    });

}

test.php confirms this:

foreach ($_POST as $key => $value){
    $zeroKey = $key;  
    //only one key, so $zeroKey is only key
}
$j = json_decode($zeroKey);
            //$j is the expected map

Akhilendra · Accepted Answer · 2018-08-24 12:53:08Z

4

your json_ is string, remove ''

 json_ = {"a":"A","b":"B","c":"C"}

answered Aug 24, 2018 at 12:53

Akhilendra

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Comments

Leo · Accepted Answer · 2018-08-24 12:58:31Z

0

two solutions:

1

as suggested by the other user:

remove '' from your json string

2

if you want to use a string you must also use the function JSON.parse()

Example

  var json_= '{"a":"A","b":"B","c":"C"}';
    json_= JSON.parse(json_);

answered Aug 24, 2018 at 12:58

Leo

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