我正在创建一个主题，在该主题中我创建了一些自定义帖子类型products和一些自定义元框，以提交它们各自的自定义信息，例如其成本和到期日期。
通过进行一些搜索add_theme_support( 'post-thumbnails' );，我能够添加一个特色图片列来上传与特定帖子相关的特色图片。但它只允许我添加单个图像，并且我想上传与一个特定自定义帖子相关的多个图像。例如单个产品的不同图像。
为此，我在互联网上找到了不同的解决方案，其中一个我发现最适合我的问题的解决方案就是这个，但它再次只允许我上传一张图片，但与特色图片不同。
WordPress 是否有任何功能可以上传多个图像，例如特别是单个帖子的特色图像上传，或者是否有任何插件可以完成此任务？
<?php
add_action( 'admin_init', 'add_post_gallery_so_14445904' );
add_action( 'admin_head-post.php', 'print_scripts_so_14445904' );
add_action( 'admin_head-post-new.php', 'print_scripts_so_14445904' );
add_action( 'save_post', 'update_post_gallery_so_14445904', 10, 2 );
/**
* Add custom Meta Box to Posts post type
*/
function add_post_gallery_so_14445904()
{
add_meta_box(
'post_gallery',
'Studio Image Uploader',
'post_gallery_options_so_14445904',
'post',// here you can set post type name
'normal',
'core'
);
}
/**
* Print the Meta Box content
*/
function post_gallery_options_so_14445904()
{
global $post;
$gallery_data = get_post_meta( $post->ID, 'gallery_data', true );
// Use nonce for verification
wp_nonce_field( plugin_basename( __FILE__ ), 'noncename_so_14445904' );
?>
<div id="dynamic_form">
<div id="field_wrap">
<?php
if ( isset( $gallery_data['image_url'] ) )
{
for( $i = 0; $i < count( $gallery_data['image_url'] ); $i++ )
{
?>
<div class="field_row">
<div class="field_left">
<div class="form_field">
<label>Image URL</label>
<input type="text"
class="meta_image_url"
name="gallery[image_url][]"
value="<?php esc_html_e( $gallery_data['image_url'][$i] ); ?>"
/>
</div>
</div>
<div class="field_right image_wrap">
<img src="<?php esc_html_e( $gallery_data['image_url'][$i] ); ?>" height="48" width="48" />
</div>
<div class="field_right">
<input class="button" type="button" value="Choose File" onclick="add_image(this)" /><br />
<input class="button" type="button" value="Remove" onclick="remove_field(this)" />
</div>
<div class="clear" /></div>
</div>
<?php
} // endif
} // endforeach
?>
</div>
<div style="display:none" id="master-row">
<div class="field_row">
<div class="field_left">
<div class="form_field">
<label>Image URL</label>
<input class="meta_image_url" value="" type="text" name="gallery[image_url][]" />
</div>
</div>
<div class="field_right image_wrap">
</div>
<div class="field_right">
<input type="button" class="button" value="Choose File" onclick="add_image(this)" />
<br />
<input class="button" type="button" value="Remove" onclick="remove_field(this)" />
</div>
<div class="clear"></div>
</div>
</div>
<div id="add_field_row">
<input class="button" type="button" value="Add Field" onclick="add_field_row();" />
</div>
</div>
<?php
}
/**
* Print styles and scripts
*/
function print_scripts_so_14445904()
{
// Check for correct post_type
global $post;
if( 'post' != $post->post_type )// here you can set post type name
return;
?>
<style type="text/css">
.field_left {
float:left;
}
.field_right {
float:left;
margin-left:10px;
}
.clear {
clear:both;
}
#dynamic_form {
width:580px;
}
#dynamic_form input[type=text] {
width:300px;
}
#dynamic_form .field_row {
border:1px solid #999;
margin-bottom:10px;
padding:10px;
}
#dynamic_form label {
padding:0 6px;
}
</style>
<script type="text/javascript">
function add_image(obj) {
var parent=jQuery(obj).parent().parent('div.field_row');
var inputField = jQuery(parent).find("input.meta_image_url");
tb_show('', 'media-upload.php?TB_iframe=true');
window.send_to_editor = function(html) {
var url = jQuery(html).find('img').attr('src');
inputField.val(url);
jQuery(parent)
.find("div.image_wrap")
.html('<img src="'+url+'" height="48" width="48" />');
// inputField.closest('p').prev('.awdMetaImage').html('<img height=120 width=120 src="'+url+'"/><p>URL: '+ url + '</p>');
tb_remove();
};
return false;
}
function remove_field(obj) {
var parent=jQuery(obj).parent().parent();
//console.log(parent)
parent.remove();
}
function add_field_row() {
var row = jQuery('#master-row').html();
jQuery(row).appendTo('#field_wrap');
}
</script>
<?php
}
/**
* Save post action, process fields
*/
function update_post_gallery_so_14445904( $post_id, $post_object )
{
// Doing revision, exit earlier **can be removed**
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
return;
// Doing revision, exit earlier
if ( 'revision' == $post_object->post_type )
return;
// Verify authenticity
if ( !wp_verify_nonce( $_POST['noncename_so_14445904'], plugin_basename( __FILE__ ) ) )
return;
// Correct post type
if ( 'post' != $_POST['post_type'] ) // here you can set post type name
return;
if ( $_POST['gallery'] )
{
// Build array for saving post meta
$gallery_data = array();
for ($i = 0; $i < count( $_POST['gallery']['image_url'] ); $i++ )
{
if ( '' != $_POST['gallery']['image_url'][ $i ] )
{
$gallery_data['image_url'][] = $_POST['gallery']['image_url'][ $i ];
}
}
if ( $gallery_data )
update_post_meta( $post_id, 'gallery_data', $gallery_data );
else
delete_post_meta( $post_id, 'gallery_data' );
}
// Nothing received, all fields are empty, delete option
else
{
delete_post_meta( $post_id, 'gallery_data' );
}
}
?>
哦，谢谢你告诉我 Brasofilo。正确的答案是可以通过帖子标题下方的媒体上传按钮上传多张图片，并可以使用图库短代码将这些图片显示在前端的图库中，例如：-
<?php echo do_shortcode('[gallery size="thumbnail"]'); ?>