Come aggiungere file multimediali da front-end per un post esistente?

Question

Golden Apples design creato ( per quanto ne so) i mezzi di comunicazione di upload funzione che molte persone in WP.A e altrove sembrano raccomandare. Ma tutte le domande e risposte si possono trovare sul affare StackExchange con la creazione di uno completamente nuovo post.

Qual è il modo migliore per ottenere questo (o un altro frammento) per caricare supporti dal front-end, collegarlo alla corrente postale, generare le miniature appropriate, e quindi aggiornare la pagina che mostra la nuova immagine in [gallery ]?

Ecco il codice di Than: Nel file di funzioni ...

function insert_attachment($file_handler,$post_id,$setthumb='false') {

  // check to make sure its a successful upload
  if ($_FILES[$file_handler]['error'] !== UPLOAD_ERR_OK) __return_false();

  require_once(ABSPATH . "wp-admin" . '/includes/image.php');
  require_once(ABSPATH . "wp-admin" . '/includes/file.php');
  require_once(ABSPATH . "wp-admin" . '/includes/media.php');

  $attach_id = media_handle_upload( $file_handler, $post_id );

  if ($setthumb) update_post_meta($post_id,'_thumbnail_id',$attach_id);
  return $attach_id;

Pagina Nel modello di intestazione ...

// set $post_id to the id of the post you want to attach
// these uploads to (or 'null' to just handle the uploads
// without attaching to a post)

if ($_FILES) {
  foreach ($_FILES as $file => $array) {
    $newupload = insert_attachment($file,$post_id);
    // $newupload returns the attachment id of the file that
    // was just uploaded. Do whatever you want with that now.
  }
}

Carica modulo utilizzato ...

<form method="post" action="#" enctype="multipart/form-data" >
  <input type="file" name="an_uploaded_attachment">
  <input type="file" name="another_uploaded_attachment">
  <input type="file" name="yet_another_uploaded_attachment">
  <input type="submit">
<form>

Answer 1

@AboSami actually answered this question in an older post that was not showing up in my search diligence. While he was actually looking for something else his example code worked great.

Here's the script:

<?php $post_id = $post->ID;
if ( isset( $_POST['html-upload'] ) && !empty( $_FILES ) ) {
    require_once(ABSPATH . 'wp-admin/includes/admin.php');
    $id = media_handle_upload('async-upload', $post_id); //post id of Client Files page
    unset($_FILES);
    if ( is_wp_error($id) ) {
        $errors['upload_error'] = $id;
        $id = false;
    }

    if ($errors) {
        echo "<p>There was an error uploading your file.</p>";
    } else {
        echo "<p>Your file has been uploaded.</p>";
    }
}

?>
    <form id="file-form" enctype="multipart/form-data" action="<?php echo $_SERVER['REQUEST_URI']; ?>" method="POST">

    <p id="async-upload-wrap"><label for="async-upload">upload</label>
    <input type="file" id="async-upload" name="async-upload"> <input type="submit" value="Upload" name="html-upload"></p>

    <p><input type="hidden" name="post_id" id="post_id" value="<?php echo $post_id ?>" />
    <?php wp_nonce_field('client-file-upload'); ?>
    <input type="hidden" name="redirect_to" value="<?php echo $_SERVER['REQUEST_URI']; ?>" /></p>

    <p><input type="submit" value="Save all changes" name="save" style="display: none;"></p>
    </form>

Answer 2

In your header change $post_id to $post->ID.

// set $post_id to the id of the post you want to attach
// these uploads to (or 'null' to just handle the uploads
// without attaching to a post)

if ($_FILES) {
  foreach ($_FILES as $file => $array) {
    $newupload = insert_attachment($file,$post->ID);
    // $newupload returns the attachment id of the file that
    // was just uploaded. Do whatever you want with that now.
  }
}