What is the method for retrieving this data using Javascript?

I received this JSON-encoded data:

{
    "error": {
        "msg":"Concurrent verifications to the same number are not allowed",
        "code":10
    }
}

and I tried to access the 'msg' value using JavaScript as follows:

$("#buttonPhoneSubmit").click(function(e) {
    $("#verifyForm").show();
    e.preventDefault();
    $.ajax({
        type: 'post',
        url: './process.php',
        data: $('form').serialize(),
        datatype:'json', 
        success: function (data) {
             $('#error_message').html(data.error.msg);
        }
    });

However, I encountered an issue where it reported that the 'data' is undefined. Can someone identify what's causing this problem in the code?

Thank you!

Answer №1

In agreement with Roy's statement, the issue lies in having datatype: 'json' instead of dataType: 'json'. This leads me to believe that jQuery is not properly parsing the JSON data for you.

Rather than simply changing it to dataType: 'json', a more effective solution would be to modify the PHP file to include the Content-Type: application/json header in the response:

// Add this line in the PHP file before sending the response body
header('Content-Type: application/json');

By doing so, you can omit datatype: 'json' from your ajax call. jQuery will automatically recognize the content type and handle the parsing accordingly, allowing your code to function as intended (assuming the JSON returned matches your expectations).

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