如何将媒体从前端添加到现有帖子？

Question

金苹果设计 （据我所知）创建了许多人在WP.A和其他地方似乎推荐的媒体上传功能。但是，我在Stackexchange上找到的所有问答都涉及创建一个全新的帖子。

获取此（或其他片段）从前端上传介质，将其连接到当前帖子，生成适当的缩略图，然后刷新页面上显示新图像在[Gallery]中的新图像的最佳方法是什么？

这是代码：在函数文件中...

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;

在页面模板标题...

// 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.
  }
}

上传表格...

<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实际上 回答了这个问题 在我的搜索努力中没有出现的较旧帖子中。当他实际上在寻找其他东西时，他的示例代码效果很好。

这是脚本：

<?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

在您的标题更改中 $post_id 至 $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.
  }
}