您好
我使用WordPress Meta-box创建了一个图片上传，但它仅适用于＆＃34; JPG＆＃34;扩展
通过此代码
function add_custom_meta_boxes() {
// Define the custom attachment for posts
add_meta_box(
'wp_custom_attachment',
'Product Images',
'wp_custom_attachment',
'post',
'normal'
);
} // end add_custom_meta_boxes
add_action('add_meta_boxes', 'add_custom_meta_boxes');
function wp_custom_attachment() {
wp_nonce_field(plugin_basename(__FILE__), 'wp_custom_attachment_nonce');
$html = '<p class="description">';
$html .= 'Upload your Image here.';
$html .= '</p>';
$html .= '<input type="file" id="wp_custom_attachment" name="wp_custom_attachment" value="" size="25" />';
echo $html;
} // end wp_custom_attachment
function save_custom_meta_data($id) {
/* --- security verification --- */
if(!wp_verify_nonce($_POST['wp_custom_attachment_nonce'], plugin_basename(__FILE__))) {
return $id;
} // end if
if(defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
return $id;
} // end if
if('page' == $_POST['post_type']) {
if(!current_user_can('edit_page', $id)) {
return $id;
} // end if
} else {
if(!current_user_can('edit_page', $id)) {
return $id;
} // end if
} // end if
/* - end security verification - */
// Make sure the file array isn't empty
if(!empty($_FILES['wp_custom_attachment']['name'])) {
// Setup the array of supported file types. In this case, it's just JPG.
$supported_types = array('image/jpg', 'image/jpeg', 'image/pjpeg');
// Get the file type of the upload
$arr_file_type = wp_check_filetype(basename($_FILES['wp_custom_attachment']['name']));
$uploaded_type = $arr_file_type['type'];
// Check if the type is supported. If not, throw an error.
if(in_array($uploaded_type, $supported_types)) {
// Use the WordPress API to upload the file
$upload = wp_upload_bits($_FILES['wp_custom_attachment']['name'], null, file_get_contents($_FILES['wp_custom_attachment']['tmp_name']));
if(isset($upload['error']) && $upload['error'] != 0) {
wp_die('There was an error uploading your file. The error is: ' . $upload['error']);
} else {
add_post_meta($id, 'wp_custom_attachment', $upload);
update_post_meta($id, 'wp_custom_attachment', $upload);
} // end if/else
} else {
wp_die("The file type that you've uploaded is not a JPG.");
} // end if/else
} // end if
} // end save_custom_meta_data
add_action('save_post', 'save_custom_meta_data');
function update_edit_form() {
echo ' enctype="multipart/form-data"';
} // end update_edit_form
add_action('post_edit_form_tag', 'update_edit_form');
它运作良好。
我现在的问题是＆＃34;如何创建多个图片上传并为其提供更多supported_types？＆＃34;
谢谢
答案 0 :(得分：0)
实现这一目标有一种快速而好的方式/做法。
答案 1 :(得分：0)
我知道您不是要插件，而是上传了多个图片，我偶然发现了一个可以满足所有需求的免费插件：ACF Photo Gallery Field。只需将此图库字段添加到所需的帖子类型中，即可轻松添加所需的任意数量的图像。另外，获取图像可以用几行代码完成。
答案 2 :(得分：0)
这是我的工作解决方案，我在使用基本HTML多重上传表单，您只需要对$_FILES进行不同的处理，即可在这里找到documentation。
// 3. Save the order invoices
add_action('save_post', 'save_order_invoice_meta');
function save_order_invoice_meta($id) {
/* --- security verification --- */
if(!wp_verify_nonce($_POST['order_invoice_nonce'], plugin_basename(__FILE__))) {
return $id;
} // end if
if(defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
return $id;
} // end if
if('page' == $_POST['post_type']) {
if(!current_user_can('edit_page', $id)) {
return $id;
} // end if
} else {
if(!current_user_can('edit_page', $id)) {
return $id;
} // end if
} // end if
/* - end security verification - */
$invoices = $_FILES['order_invoice'];
// Make sure the file array isn't empty
if(!empty($invoices)) {
$invoices_cleaned = reArrayFiles($invoices);
// Setup the array of supported file types. In this case, it's just PDF.
$supported_types = array('application/pdf');
$metadata_index = 1;
foreach( $invoices_cleaned as $invoice ) {
// Get the file type of the upload
$arr_file_type = wp_check_filetype(basename($invoice['name']));
$uploaded_type = $arr_file_type['type'];
// Check if the type is supported. If not, throw an error.
if(in_array($uploaded_type, $supported_types)) {
// Use the WordPress API to upload the file
$upload = wp_upload_bits($invoice['name'], null, file_get_contents($invoice['tmp_name']));
if(isset($upload['error']) && $upload['error'] != 0) {
wp_die('There was an error uploading your file. The error is: ' . $upload['error']);
} else {
add_post_meta($id, "order_invoice_$metadata_index", $upload);
update_post_meta($id, "order_invoice_$metadata_index", $upload);
$metadata_index++;
} // end if/else
} else {
wp_die("The file type that you've uploaded is not a PDF.");
} // end if/else
}
} // end if
} // end save_custom_meta_data
// 4. Adding extra markup to the form tag of the order edit form in order to accept images and multiple file upload
add_action('post_edit_form_tag', 'update_order_edit_form');
function update_order_edit_form() {
echo 'multipart="" enctype="multipart/form-data"';
} // end update_order_edit_form
// Helper function to re-order multiple uploaded files array to something more cleaner
function reArrayFiles(&$file_post) {
$file_ary = array();
$file_count = count($file_post['name']);
$file_keys = array_keys($file_post);
for ($i=0; $i<$file_count; $i++) {
foreach ($file_keys as $key) {
$file_ary[$i][$key] = $file_post[$key][$i];
}
}
return $file_ary;
}
这样，您将为上传的每个图像生成不同的元数据，现在下一步需要正确设置元框回调，输入字段应如下所示：
<input type="file" id="order_invoice_attachment" name="order_invoice[]" value="" size="25" multiple/>
然后，您将需要正确显示文件，这将由您自己决定，但是通过此实现，文件将被正确保存为订单上的元数据字段。
答案 3 :(得分：-1)
我在网站上找到了代码并对其进行了一些修改
//***************************** Start banner images metabox in page page ***********************
function call_Multi_Image_Uploader()
{
new Multi_Image_Uploader();
}
function get_images($post_id=null)
{
global $post;
if ($post_id == null)
{
$post_id = $post->ID;
}
$value = get_post_meta($post_id, 'images', true);
$images = unserialize($value);
$result = array();
if (!empty($images))
{
foreach ($images as $image)
{
$image = str_replace('.jpg', '-1903x428.jpg' , $image);
$result[] = $image;
}
}
return $result;
}
if (is_admin())
{
add_action('load-post.php', 'call_Multi_Image_Uploader');
add_action('load-post-new.php', 'call_Multi_Image_Uploader');
}
/**
* Multi_Image_Uploader
*/
class Multi_Image_Uploader
{
var $post_types = array();
/**
* Initialize Multi_Image_Uploader
*/
public function __construct()
{
$this->post_types = array('page'); //limit meta box to certain post types
add_action('add_meta_boxes', array($this, 'add_meta_box'));
add_action('save_post', array($this, 'save'));
add_action('admin_enqueue_scripts', array($this, 'enqueue_scripts'));
}
/**
* Adds the meta box container.
*/
public function add_meta_box($post_type)
{
if (in_array($post_type, $this->post_types))
{
add_meta_box(
'multi_image_upload_meta_box'
, __('Banner Image Upload', 'textdomain')
, array($this, 'render_meta_box_content')
, $post_type
, 'advanced'
, 'high'
);
}
}
/**
* Save the images when the post is saved.
*
* @param int $post_id The ID of the post being saved.
*/
public function save($post_id)
{ /*
* We need to verify this came from the our screen and with proper authorization,
* because save_post can be triggered at other times.
*/
// Check if our nonce is set.
if (!isset($_POST['inner_custom_box_nonce']))
return $post_id;
$nonce = $_POST['inner_custom_box_nonce'];
// Verify that the nonce is valid.
if (!wp_verify_nonce($nonce, 'inner_custom_box'))
return $post_id;
// If this is an autosave, our form has not been submitted,
// so we don't want to do anything.
if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
return $post_id;
// Check the user's permissions.
if ('page' == $_POST['post_type'])
{
if (!current_user_can('edit_page', $post_id))
return $post_id;
} else
{
if (!current_user_can('edit_post', $post_id))
return $post_id;
}
/* OK, its safe for us to save the data now. */
// Validate user input.
$posted_images = $_POST['images'];
$images = array();
if (!empty($posted_images))
{
foreach ($posted_images as $image_url)
{
if (!empty($image_url))
$images[] = esc_url_raw($image_url);
}
}
// Update the images meta field.
update_post_meta($post_id, 'images', serialize($images));
}
/**
* Render Meta Box content.
*
* @param WP_Post $post The post object.
*/
public function render_meta_box_content($post)
{
// Add an nonce field so we can check for it later.
wp_nonce_field('inner_custom_box', 'inner_custom_box_nonce');
// Use get_post_meta to retrieve an existing value from the database.
$value = get_post_meta($post->ID, 'images', true);
$metabox_content = '<div id="images"></div><input type="button" onClick="addRow()" value="Add Image" class="button" />';
echo $metabox_content;
$images = unserialize($value);
$script = "<script>
itemsCount= 0;";
if (!empty($images))
{
foreach ($images as $image)
{
$script.="addRow('{$image}');";
}
}
$script .="</script>";
echo $script;
}
function enqueue_scripts($hook)
{
if ('post.php' != $hook && 'post-edit.php' != $hook && 'post-new.php' != $hook)
return;
wp_enqueue_script('banner_uploader', get_template_directory_uri()."/js/banner_uploader.js", array('jquery'));
}
}
//***************************** END banner images metabox in page page ***********************