Come caricare immagini utilizzando wp_handle_upload

Ciao, ecco il codice che ho utilizzato nel mio plugin, spero tu lo capisca e se hai qualche problema puoi chiedermelo:-

if(isset($_FILES))
    {
        for ($i=1; $i < count($_FILES) ; $i++) 
        { 

            $uploadedfile = $_FILES['question_'.$i];
            ?>
            <script type="text/javascript">
            $(document).ready(function(){
                var nam = <?php echo "question".$i; ?>
                var namm = $("."+nam).prev().attr('name');

            });
            </script>
            <?php


        $upload_overrides = array( 'test_form' => false );

        $movefile = wp_handle_upload( $uploadedfile, $upload_overrides );

        if ( $movefile && !isset( $movefile['error'] ) {
            //echo "File is valid, and was successfully uploaded.\n";
            $filename = $movefile['file'];
        } else {
            /**
             * Errore generato da _wp_handle_upload()
             * @see _wp_handle_upload() in wp-admin/includes/file.php
             */
            echo $movefile['error'];
        }

        // $filename dovrebbe essere il percorso di un file nella directory di upload
        //$filename = '/path/to/uploads/2013/03/filename.jpg';


        // Ottieni il percorso della directory di upload
        $wp_upload_dir = wp_upload_dir();

        $url = $wp_upload_dir['url'] . '/' . basename( $filename );
        echo $url."<br>";

    }           
    }

Ecco il mio codice HTML:-

    $question = get_post_meta($trivia->ID,'question',true);

     $c = 0;
     $id = uniqid();
    if ( count( $question ) > 0 ) {
        if(is_array($question)){

        foreach( $question as $questions ) {
            if ( isset( $questions['question'] ) ) {


                printf('<p>Domanda: <input type="text" name="question[%1$s][question]" value="%2$s"> -- <span class="remove_question">%3$s</span><span class="add_answer">   Aggiungi Risposta</span></p>',   $c,$questions['question'],__('Rimuovi Domanda'));
                for($i = 1; $i<=count($questions['answers']); $i++)
                {
                    if($questions['answers'][$i]['image'])
                    {
                        printf('<p>Opzione %5$s <input type="text" value="%1$s" name="question[%4$s][answers][%5$s][answer]"> Stato <input type="text" value="%2$s" name="question[%4$s][answers][%5$s][status]"> Immagine <input type="text" name="question[%4$s][answers][%5$s][image]" value="%6$s"><img src="%6$s" height="100" width="100"> -- <span class="remove_answer">%3$s</span></p>', $questions['answers'][$i]['answer'] ,$questions['answers'][$i]['status'], __('Rimuovi Risposta'), $c, $i,$questions['answers'][$i]['image']);
                    }
                    else
                    {
                        printf('<p>Opzione %5$s <input type="text" value="%1$s" name="question[%4$s][answers][%5$s][answer]"> Stato <input type="text" value="%2$s" name="question[%4$s][answers][%5$s][status]"> -- <span class="remove_answer">%3$s</span></p>', $questions['answers'][$i]['answer'] ,$questions['answers'][$i]['status'], __('Rimuovi Risposta'), $c, $i);
                    }
                }
                $c = $c +1;
            }
        }
    }
}
 ?>
<span id="question_here"></span>
<span class="add_question"><?php _e('Aggiungi Domanda'); ?></span>
<script>
    var $ =jQuery.noConflict();
    $(document).ready(function() {
        var count = <?php echo $c; ?>;
         var countt = 0;
        $(".add_question").click(function() {
            count = count + 1;
            countt = 0;
            $('#question_here').append('<p>Domanda: <input type="text" name="question['+count+'][question]" value=""> -- <span class="remove_question">Rimuovi domanda</span><span class="add_answer"> Aggiungi Risposta</span></p>' );
            return false;
        });
        $(".remove_question").live('click', function() {
            $(this).parent().remove();
        });


        $(".add_answer").live('click',function(){
            countt = countt + 1;
            $('#question_here').append('<p>Risposta <input type="text" name="question['+count+'][answers]['+countt+'][answer]"> Stato <input type="text" name="question['+count+'][answers]['+countt+'][status]"><input id="question_'+count+'_answers_'+countt+'_image" type="text" size="36" name="question['+count+'][answers]['+countt+'][image]" value="" /><input class="upload_image_button" type="button" value="Carica Immagine" /><span class="remove_answer">Rimuovi</span></p>');
        })
         $('.upload_image_button').live('click',function() {
         formfield = $('#upload_image').attr('name');
         tb_show('', 'media-upload.php?type=image&amp;TB_iframe=true');

         return false;
        });

         window.send_to_editor = function(html) {
         imgurl = $('img',html).attr('src');
         $('#question_'+count+'_answers_'+countt+'_image').val(imgurl);
         tb_remove();
        }
        $(".remove_answer").live('click', function() {
            $(this).parent().remove();
        });

    });
    </script>
</div><?php

funzione per gestire il caricamento dell'immagine per l'input di tipo file con nome 'email_image'.

if (!empty($_FILES['email_image']['name'])) {
    $uploadedfile = $_FILES['email_image'];
    $upload_overrides = array('test_form' => false);

    // Usa la funzione di WordPress per gestire il caricamento del file
    $movefile = wp_handle_upload($uploadedfile, $upload_overrides);

    if ($movefile && !isset($movefile['error'])) {
        // Salva l'URL dell'immagine
        update_option('ccd_email_image', $movefile['url']);
        echo '<div class="updated"><p>Dettagli contatto salvati!</p></div>';
    } else {
        echo '<div class="error"><p>' . $movefile['error'] . '</p></div>';
    }
}