基本上，我需要向页面添加自定义元框，其中一个选项必须是以前帖子中的类别列表。我已经成功地添加了元盒，并将类别包装在一个数组中，但是页面上肯定缺少了一些内容，只显示了类别名称的第一个字母。以下是结果的屏幕截图：
我不知道我错过了什么。以下是metabox的代码：
// Check if is page-homepage.php template
$post_id = (isset($_GET[\'post\'])) ? $_GET[\'post\'] : ((isset($_POST[\'post_ID\'])) ? $_POST[\'post_ID\'] : false);
if ($post_id) :
$post_template = get_post_meta($post_id, \'_wp_page_template\', true);
if ($post_template == \'page-homepage.php\') {
// Add the Meta Box
function home_custom_meta_box() {
add_meta_box(
\'home_meta_box\', // $id
\'Custom Meta Box\', // $title
\'home_show_custom_meta_box\', // $callback
\'page\', // $page
\'normal\', // $context
\'high\'); // $priority
}
add_action(\'add_meta_boxes\', \'home_custom_meta_box\');
// Field Array
$prefix = \'custom_\';
$home_custom_meta_fields = array(
array(
\'label\' => \'Title for the middle column\',
\'desc\' => \'Optional\',
\'id\' => $prefix.\'title1\',
\'type\' => \'text\'
),
array(
\'label\' => \'Category\',
\'id\' => $prefix.\'category\',
\'type\' => \'select\',
\'options\' => $wp_cats
),
array(
\'label\' => \'Title for the right column\',
\'desc\' => \'Optional\',
\'id\' => $prefix.\'title2\',
\'type\' => \'text\'
),
array(
\'label\' => \'Textarea\',
\'desc\' => \'A description for the field.\',
\'id\' => $prefix.\'textarea\',
\'type\' => \'textarea\'
),
array(
\'label\' => \'Checkbox Input\',
\'desc\' => \'A description for the field.\',
\'id\' => $prefix.\'checkbox\',
\'type\' => \'checkbox\'
),
array(
\'label\' => \'Select Box\',
\'desc\' => \'A description for the field.\',
\'id\' => $prefix.\'select\',
\'type\' => \'select\',
\'options\' => array (
\'one\' => array (
\'label\' => \'Option One\',
\'value\' => \'one\'
),
\'two\' => array (
\'label\' => \'Option Two\',
\'value\' => \'two\'
),
\'three\' => array (
\'label\' => \'Option Three\',
\'value\' => \'three\'
)
)
),
array (
\'label\' => \'Radio Group\',
\'desc\' => \'A description for the field.\',
\'id\' => $prefix.\'radio\',
\'type\' => \'radio\',
\'options\' => array (
\'one\' => array (
\'label\' => \'Option One\',
\'value\' => \'one\'
),
\'two\' => array (
\'label\' => \'Option Two\',
\'value\' => \'two\'
),
\'three\' => array (
\'label\' => \'Option Three\',
\'value\' => \'three\'
)
)
),
array (
\'label\' => \'Checkbox Group\',
\'desc\' => \'A description for the field.\',
\'id\' => $prefix.\'checkbox_group\',
\'type\' => \'checkbox_group\',
\'options\' => array (
\'one\' => array (
\'label\' => \'Option One\',
\'value\' => \'one\'
),
\'two\' => array (
\'label\' => \'Option Two\',
\'value\' => \'two\'
),
\'three\' => array (
\'label\' => \'Option Three\',
\'value\' => \'three\'
)
)
),
array(
\'label\' => \'Post List\',
\'desc\' => \'A description for the field.\',
\'id\' => $prefix.\'post_id\',
\'type\' => \'post_list\',
\'post_type\' => array(\'post\',\'page\')
),
);
// The Callback
function home_show_custom_meta_box() {
global $home_custom_meta_fields, $post;
// Use nonce for verification
echo \'<input type="hidden" name="custom_meta_box_nonce" value="\'.wp_create_nonce(basename(__FILE__)).\'" />\';
// Begin the field table and loop
echo \'<table class="form-table">\';
foreach ($home_custom_meta_fields as $field) {
// get value of this field if it exists for this post
$meta = get_post_meta($post->ID, $field[\'id\'], true);
// begin a table row with
echo \'<tr>
<th><label for="\'.$field[\'id\'].\'">\'.$field[\'label\'].\'</label></th>
<td>\';
switch($field[\'type\']) {
// text
case \'text\':
echo \'<input type="text" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" value="\'.$meta.\'" size="30" />
<br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// textarea
case \'textarea\':
echo \'<textarea name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" cols="60" rows="4">\'.$meta.\'</textarea>
<br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// checkbox
case \'checkbox\':
echo \'<input type="checkbox" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" \',$meta ? \' checked="checked"\' : \'\',\'/>
<label for="\'.$field[\'id\'].\'">\'.$field[\'desc\'].\'</label>\';
break;
// select
case \'select\':
echo \'<select name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'">\';
foreach ($field[\'options\'] as $option) {
echo \'<option\', $meta == $option[\'value\'] ? \' selected="selected"\' : \'\', \' value="\'.$option[\'value\'].\'">\'.$option[\'label\'].\'</option>\';
}
echo \'</select><br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// radio
case \'radio\':
foreach ( $field[\'options\'] as $option ) {
echo \'<input type="radio" name="\'.$field[\'id\'].\'" id="\'.$option[\'value\'].\'" value="\'.$option[\'value\'].\'" \',$meta == $option[\'value\'] ? \' checked="checked"\' : \'\',\' />
<label for="\'.$option[\'value\'].\'">\'.$option[\'label\'].\'</label><br />\';
}
echo \'<span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// checkbox_group
case \'checkbox_group\':
foreach ($field[\'options\'] as $option) {
echo \'<input type="checkbox" value="\'.$option[\'value\'].\'" name="\'.$field[\'id\'].\'[]" id="\'.$option[\'value\'].\'"\',$meta && in_array($option[\'value\'], $meta) ? \' checked="checked"\' : \'\',\' />
<label for="\'.$option[\'value\'].\'">\'.$option[\'label\'].\'</label><br />\';
}
echo \'<span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// tax_select
case \'tax_select\':
echo \'<select name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'">
<option value="">Select One</option>\'; // Select One
$terms = get_terms($field[\'id\'], \'get=all\');
$selected = wp_get_object_terms($post->ID, $field[\'id\']);
foreach ($terms as $term) {
if (!empty($selected) && !strcmp($term->slug, $selected[0]->slug))
echo \'<option value="\'.$term->slug.\'" selected="selected">\'.$term->name.\'</option>\';
else
echo \'<option value="\'.$term->slug.\'">\'.$term->name.\'</option>\';
}
$taxonomy = get_taxonomy($field[\'id\']);
echo \'</select><br /><span class="description"><a href="\'.get_bloginfo(\'home\').\'/wp-admin/edit-tags.php?taxonomy=\'.$field[\'id\'].\'">Manage \'.$taxonomy->label.\'</a></span>\';
break;
// post_list
case \'post_list\':
$items = get_posts( array (
\'post_type\' => $field[\'post_type\'],
\'posts_per_page\' => -1
));
echo \'<select name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'">
<option value="">Select One</option>\'; // Select One
foreach($items as $item) {
echo \'<option value="\'.$item->ID.\'"\',$meta == $item->ID ? \' selected="selected"\' : \'\',\'>\'.$item->post_type.\': \'.$item->post_title.\'</option>\';
} // end foreach
echo \'</select><br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// date
case \'date\':
echo \'<input type="text" class="datepicker" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" value="\'.$meta.\'" size="30" />
<br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// slider
case \'slider\':
$value = $meta != \'\' ? $meta : \'0\';
echo \'<div id="\'.$field[\'id\'].\'-slider"></div>
<input type="text" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" value="\'.$value.\'" size="5" />
<br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// image
case \'image\':
$image = get_template_directory_uri().\'/images/image.png\';
echo \'<span class="custom_default_image" style="display:none">\'.$image.\'</span>\';
if ($meta) { $image = wp_get_attachment_image_src($meta, \'medium\'); $image = $image[0]; }
echo \'<input name="\'.$field[\'id\'].\'" type="hidden" class="custom_upload_image" value="\'.$meta.\'" />
<img src="\'.$image.\'" class="custom_preview_image" alt="" /><br />
<input class="custom_upload_image_button button" type="button" value="Choose Image" />
<small> <a href="#" class="custom_clear_image_button">Remove Image</a></small>
<br clear="all" /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// repeatable
case \'repeatable\':
echo \'<a class="repeatable-add button" href="#">+</a>
<ul id="\'.$field[\'id\'].\'-repeatable" class="custom_repeatable">\';
$i = 0;
if ($meta) {
foreach($meta as $row) {
echo \'<li><span class="sort hndle">|||</span>
<input type="text" name="\'.$field[\'id\'].\'[\'.$i.\']" id="\'.$field[\'id\'].\'" value="\'.$row.\'" size="30" />
<a class="repeatable-remove button" href="#">-</a></li>\';
$i++;
}
} else {
echo \'<li><span class="sort hndle">|||</span>
<input type="text" name="\'.$field[\'id\'].\'[\'.$i.\']" id="\'.$field[\'id\'].\'" value="" size="30" />
<a class="repeatable-remove button" href="#">-</a></li>\';
}
echo \'</ul>
<span class="description">\'.$field[\'desc\'].\'</span>\';
break;
} //end switch
echo \'</td></tr>\';
} // end foreach
echo \'</table>\'; // end table
}
// Save the Data
function home_save_custom_meta($post_id) {
global $home_custom_meta_fields;
// verify nonce
if (!wp_verify_nonce($_POST[\'custom_meta_box_nonce\'], basename(__FILE__)))
return $post_id;
// check autosave
if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)
return $post_id;
// check permissions
if (\'page\' == $_POST[\'post_type\']) {
if (!current_user_can(\'edit_page\', $post_id))
return $post_id;
} elseif (!current_user_can(\'edit_post\', $post_id)) {
return $post_id;
}
// loop through fields and save the data
foreach ($home_custom_meta_fields as $field) {
$old = get_post_meta($post_id, $field[\'id\'], true);
$new = $_POST[$field[\'id\']];
if ($new && $new != $old) {
update_post_meta($post_id, $field[\'id\'], $new);
} elseif (\'\' == $new && $old) {
delete_post_meta($post_id, $field[\'id\'], $old);
}
} // enf foreach
}
add_action(\'save_post\', \'home_save_custom_meta\');
}
下面是我如何将所有类别包装到一个数组中的：
// Get all categories from WP and create a dropdown
$categories = get_categories(\'hide_empty=0&orderby=name\');
$wp_cats = array();
foreach ($categories as $category_list ) {
$wp_cats[$category_list->cat_ID] = $category_list->cat_name;
}
array_unshift($wp_cats, "Choose a category");
