我正在尝试将pdf文件附加到自定义帖子类型<我在wpsnipp找到了这个片段。com
代码起到了作用，但只适用于帖子
我有一个名为“事件”的自定义帖子类型，我无法使其正常工作。
add_action("admin_init", "pdf_init");
add_action(\'save_post\', \'save_pdf_link\');
function pdf_init(){
add_meta_box("my-pdf", "PDF Document", "pdf_link", "post", "normal", "low");
}
function pdf_link(){
global $post;
$custom = get_post_custom($post->ID);
$link = $custom["link"][0];
$count = 0;
echo \'<div class="link_header">\';
$query_pdf_args = array(
\'post_type\' => \'attachment\',
\'post_mime_type\' =>\'application/pdf\',
\'post_status\' => \'inherit\',
\'posts_per_page\' => -1,
);
$query_pdf = new WP_Query( $query_pdf_args );
$pdf = array();
echo \'<select name="link">\';
echo \'<option class="pdf_select">SELECT pdf FILE</option>\';
foreach ( $query_pdf->posts as $file) {
if($link == $pdf[]= $file->guid){
echo \'<option value="\'.$pdf[]= $file->guid.\'" selected="true">\'.$pdf[]= $file->guid.\'</option>\';
}else{
echo \'<option value="\'.$pdf[]= $file->guid.\'">\'.$pdf[]= $file->guid.\'</option>\';
}
$count++;
}
echo \'</select><br /></div>\';
echo \'<p>Selecting a pdf file from the above list to attach to this post.</p>\';
echo \'<div class="pdf_count"><span>Files:</span> <b>\'.$count.\'</b></div>\';
}
function save_pdf_link(){
global $post;
if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE){ return $post->ID; }
update_post_meta($post->ID, "link", $_POST["link"]);
}
add_action( \'admin_head\', \'pdf_css\' );
function pdf_css() {
echo \'<style type="text/css">
.pdf_select{
font-weight:bold;
background:#e5e5e5;
}
.pdf_count{
font-size:9px;
color:#0066ff;
text-transform:uppercase;
background:#f3f3f3;
border-top:solid 1px #e5e5e5;
padding:6px 6px 6px 12px;
margin:0px -6px -8px -6px;
-moz-border-radius:0px 0px 6px 6px;
-webkit-border-radius:0px 0px 6px 6px;
border-radius:0px 0px 6px 6px;
}
.pdf_count span{color:#666;}
</style>\';
}
function pdf_file_url(){
global $wp_query;
$custom = get_post_custom($wp_query->post->ID);
echo $custom[\'link\'][0];
}
并在主题中显示链接：
<? pdf_file_url(); ?>
我将帖子类型从“post”更改为“events”，元框出现在“events”页面中<到目前为止还不错
它确实在第一次保存pdf。它还显示正确的链接<但是如果我尝试更改pdf，它不会保存它。它再次显示第一个
SO网友:ksr89
这是我在wordpress网站自定义帖子类型中使用的代码，用于将pdf添加到帖子中，我尝试更改并使用它。希望能有所帮助
function add_custom_meta_boxes() {
add_meta_box(\'wp_custom_attachment\', \'Hotel Brochure\', \'wp_custom_attachment\', \'hotel_post\', \'normal\', \'high\');
}
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 PDF here.\';
$html .= \'</p>\';
$html .= \'<input type="file" id="wp_custom_attachment" name="wp_custom_attachment" value="" size="25">\';
echo $html;
}
add_action(\'save_post\', \'save_custom_meta_data\');
function save_custom_meta_data($id) {
if(!empty($_FILES[\'wp_custom_attachment\'][\'name\'])) {
$supported_types = array(\'application/pdf\');
$arr_file_type = wp_check_filetype(basename($_FILES[\'wp_custom_attachment\'][\'name\']));
$uploaded_type = $arr_file_type[\'type\'];
if(in_array($uploaded_type, $supported_types)) {
$upload = wp_upload_bits($_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: \' . $upload[\'error\']);
} else {
update_post_meta($id, \'wp_custom_attachment\', $upload);
}
}
else {
wp_die("The file type that you\'ve uploaded is not a PDF.");
}
}
}
function update_edit_form() {
echo \' enctype="multipart/form-data"\';
}
add_action(\'post_edit_form_tag\', \'update_edit_form\');
获取PDF
$hotel_brochure = get_post_meta( $post_id, \'wp_custom_attachment\', true );
$hotel_brochure[\'url\']
SO网友:leaf
对于那些想fix 和fix 公认答案：
define(\'PREFIX\', \'a-good-prefix-\');
echo \'<input type="file" name="\' . PREFIX . \'attachment">\';
add_action(\'save_post\', function ($post_id) {
$key = PREFIX . \'attachment\';
if (empty($_FILES[$key][\'name\'])) return;
if (metadata_exists(\'post\', $post_id, $key)) {
unlink(get_post_meta($post_id, $key, true)[\'file\']);
}
$name = $_FILES[$key][\'name\'];
$tmp = $_FILES[$key][\'tmp_name\'];
$bits = file_get_contents($tmp);
$upload = wp_upload_bits($name, null, $bits);
if (isset($upload[\'error\']) && $upload[\'error\'] !== false) {
wp_die(\'Upload error: \' . $upload[\'error\']);
} else {
update_post_meta($post_id, $key, $upload);
}
});
实际来源：
https://code.tutsplus.com/articles/attaching-files-to-your-posts-using-wordpress-custom-meta-boxes-part-1--wp-22291.
