使用来自AJAX对象的序列化数据和PHP

Question

I'm sending an entire form, about 8 fields, along with my AJAX data object, one of which is a serialized string:

var fields = $(this).serialize();

var data = { 
    action:'newSubmission',
    nonce: Nonce,
    fields: fields
}; 

Now within PHP I cannot understand how to get each field value from the $_POST object correctly.

$test = $_POST['field'];

Is the full string and sends back to JS a properly formatted JSON object. But how do I break up the serialized string correctly in PHP?

Answer 1

The string will be encoded, so you will have to do that with url_decode. Here is a function that I used to build a workable object out of the string.

    function urldecode_to_obj($str) {

        $str = trim($str, '"');

        // explode string before decoding
        foreach (explode('&', $str) as $chunk) {
            $param = explode("=", $chunk);

            if ($param) {

                // search string for array elements and look for key-name if exists
                preg_match('#\[(.+?)\]$#', urldecode($param[0]), $with_key);
                preg_match('#\[\]$#', urldecode($param[0]), $no_key);

                $mkey = preg_split('/\[/', urldecode($param[0]));

                // converts to array elements with numeric key
                if ($no_key) {
                    $data[$mkey[0]][] = urldecode($param[1]);
                }

                // converts to array elements with named key
                if ($with_key) {
                    $data[$mkey[0]][$with_key[1]] = urldecode($param[1]);
                }

                if (!$no_key && !$with_key) {
                    $data[urldecode($param[0])] = urldecode($param[1]);
                }

            }

        }

        return (object)$data;
    }

$str = "serialized_string";
$obj = urldecode_to_obj($str);

Your variables with values are now in the object. If you have a var1 variable in there with a value1:

$obj -> var1 = "value1";

You can also get thins back as an array. Just omit the (object) casting and return the data in t\he function as:

return $data;

If you want to return things to your JS then you should echo them out as an array and use json_encode:

$array = array("success" => true);
echo json_encode($array);