WordPress 分类及分类下的文章添加模板选择功能

本人一直在用一个分类和文章模板选择器的，不记得是从哪里弄来的，就想拿出来分享一下。利用这个模板选择器你可以给每个分类和其下的文章指定模板，非常方便，制作模板也很简单，只要加上注释代码即可。下面是图片：

要实现此功能, 你需要在你的主题根目录文件夹下新建一个template.php, 并将下面的代码复制进去(或者点此下载该文件)：

<?php
function cat_temp_menus() {
	add_menu_page('模板选择器', '模板选择器', 'manage_options', basename(__FILE__), 'cat_temp_options_page');
}
function cat_temp_meta() {
	global $wpdb,$post_ID;
	$templates = cat_temp_get_page_templates();
	$current = cat_temp_post_template($post_ID);
	$out = '<select name="cat_temp_template" style="width:100%">';
	$out .= '<option value="none"';
	if ($post_ID == 0 ||!$current) $out .= ' selected="selected"';
	$out .= '>请选择</option>';
	$out .= '<option value="/single.php"';
	if ($current == "/single.php") $out .= ' selected="selected"';
	$out .= '>默认模板</option>';
	foreach ($templates as $template =>$file) {
		$out .= '<option value="'.$file.'"';
		if ($current == $file) $out .= ' selected="selected"';
		$out .= '>'.$template.'</option>';
	}
	$out .= "</select>";
	$out .= "<p>选择文章模板</p>";
	echo $out;
}
function cat_temp_post_submit($post_ID) {
	global $wpdb;
	if ($_POST['cat_temp_template']) {
		$templates =  (get_option("cat_temp_post"));
		if ($_POST['cat_temp_template'] != 'none') {
			$templates[$post_ID] = $_POST['cat_temp_template'];
		}else {
			if ($templates[$post_ID]) {
				unset($templates[$post_ID]);
			}
		}
		update_option("cat_temp_post",($templates));
	}
}
function cat_temp_post_template($ID) {
	$templates =  (get_option("cat_temp_post"));
	return $templates[$ID];
}
function cat_temp($template) {
	global $wp_query;
	$post_obj = $wp_query->get_queried_object();
	if (is_single()) {
		$data = cat_temp_get_data();
		$categories = get_the_category($post_obj->ID);
	}else if (is_category()) {
		$data = cat_temp_get_data(true);
		$categories[0] = &get_category($post_obj->cat_ID);
	}
	$temp_data;
	foreach((array)$categories as $category) {
		if ($data[$category->term_id]['template'] != '0') {
			$temp_data[$data[$category->term_id]['template']] = $data[$category->term_id]['priority']+($category->term_id/80000);
		}
	}
	foreach((array)$data as $key =>$cat) {
		if ($cat['all'] == "all"&&$cat['template'] != "0") {
			$id = (is_single()) ?(int)$cat['id'] : $key;
			$descendants = get_term_children($id,'category');
			if ($descendants &&in_category($descendants)) {
				$temp_data[$cat['template']] = $cat['priority']+($cat['id']/80000);
			}
		}
	}
	if (is_array($temp_data)) {
		asort($temp_data);
		$template = array_shift(array_keys($temp_data));
	}
	if (is_single()) {
		$overRule = cat_temp_post_template($post_obj->ID);
		if ($overRule) $template = $overRule;
	}
	if (!empty($template)) {
		if (file_exists(TEMPLATEPATH.$template)) {
			include(TEMPLATEPATH.$template);
			exit;
		}
	}
}
function cat_temp_is_cat($cat,$_post = null) {
	if (in_category($cat,$_post)) {
		return true;
	}else {
		$descendants = get_term_children((int)$cat,'category');
		if ($descendants &&in_category($descendants,$_post)) return true;
	}
	return false;
}
function cat_temp_get_page_templates($str = "Template Name") {
	$themes = get_themes();
	$theme = get_current_theme();
	$templates = $themes[$theme]['Template Files'];
	$page_templates = array();
	if (is_array($templates)) {
		foreach((array)$templates as $template) {
			if (!file_exists($template)) $template = WP_CONTENT_DIR.$template;
			$template_data = implode('',file($template));
			$name = '';
			if (preg_match('|'.$str.':(.*)$|mi',$template_data,$name))
				$name = $name[1];
			if (!empty($name)) {
				$page_templates[trim($name)] = str_replace($themes[$theme]['Template Dir'],"",$template);
			}
		}
	}
	return $page_templates;
}
function cat_temp_cats($item,$current,$archive=false) {
	if ($archive) {
		$templates = cat_temp_get_page_templates('Archive Template');
		$default = '/archive.php';
	}else {
		$templates = cat_temp_get_page_templates();
		$default = '/single.php';
	}
	$out = '<select title="Template" class="ct_template" name="data';
	if ($archive) $out .= '[archive]';
	$out .= '['.$item.'][template]">';
	$out .= '<option value="0"';
	if ($current == "0") $out .= ' selected="selected"';
	$out .= '>未指定</option>';
	$out .= '<option value="'.$default.'"';
	if ($current == $default) $out .= ' selected="selected"';
	$out .= '>默认模板</option>';
	foreach ($templates as $template =>$file) {
		$out .= '<option value="'.$file.'"';
		if ($current == $file) $out .= ' selected="selected"';
		$out .= '>'.$template.'</option>';
	}
	$out .= "</select>";
	return $out;
}
function cat_temp_categories($child = 0) {
	$data = array(
		"hide_empty"=>false,
		"child_of"=>$child,
		"pad_count"=>false,
		);
	$categories = get_categories($data);
	$list = array();
	foreach ((array)$categories as $cat) {
		if ($cat->parent == $child) {
			$list[] = array(
				"name"=>$cat->name,
				"id"=>$cat->cat_ID,
				"count"=>cat_temp_getALLposts($cat->cat_ID),
				"acount"=>$cat->category_count,
				"child"=>cat_temp_categories($cat->cat_ID),
				);
		}
	}
	return $list;
}
function cat_temp_li_fun($data) {
	$out = "<ul class=\"cat-temp\">";
	foreach ((array)$data as $root) {
		$out .= "<li>".$root['name']." (".$root['count'].")</li>";
		if (count($root['child']) >0) {
			$out .= cat_temp_li_fun($root['child']);
		}
	}
	$out .= "</ul>";
	return $out;
}
function cat_temp_priority($item,$current,$archive) {
	$pri = array("最低","低","中等","高","最高");
	$out = '<select class="ct_priority" title="Template Priority" name="data';
	if ($archive) $out .= '[archive]';
	$out .= '['.$item.'][priority]">';
	$t = 0;
	for ($i = 10;$i >= 1;$i = $i-2) {
		$out .= '<option value="'.$i.'"';
		if (intval($current) == $i) $out .= ' selected="selected"';
		$out .= '>'.$pri[$t].'</option>';
		$t++;
	}
	$out .= "</select>";
	return $out;
}
function cat_temp_getALLposts($ID) {
	$td = array(
		'numberposts'=>-1,
		'category'=>$ID,
		);
	return count(get_posts($td));
}
function cat_temp_get_data($archive=false,$id=false) {
	$t = (!$archive) ?(get_option('cat_temp_data')) :  (get_option('cat_arch_data'));
	return (!$id) ?$t : $t[$id];
}
function cat_temp_update($data) {
	$archive = $data['archive'];
	unset($data['archive']);
	update_option('cat_temp_data',($data));
	update_option('cat_arch_data',($archive));
}
function cat_temp_delete() {
	delete_option('cat_temp_data');
	delete_option('cat_temp_post');
	delete_option('cat_arch_data');
}
function cat_temp_sub_cats($id,$data,$archive=false) {
	$out .= ' <input type="checkbox"';
	if ($data == "all") $out .= ' checked="checked"';
	$out .= ' name="data';
	if ($archive) $out .= "[archive]";
	$out .= '['.$id.'][all]" value="all" title="Apply to sub-categories" /> <small>用于子分类</small>';
	return $out;
}
function cat_temp_templates($id,$archive) {
	if ($archive) {
		$title = "分类";
		$class = " class=\"noborder\"";
		$class2 = " noborder";
	}else {
		$title = "文章";
	}
	$data = cat_temp_get_data($archive,$id);
	$out .= "<td class=\"r$class2\" >$title:</td>";
	$out .= "<td $class><div>".cat_temp_cats($id,$data['template'],$archive);
	$out .= cat_temp_sub_cats($id,$data['all'],$archive).'</div></td>';
	$out .= "<td $class><div>".cat_temp_priority($id,$data['priority'],$archive)."</div></td>";
	return $out;
}
function cat_temp_td_fun($data,$padding = 5) {
	$out = "";
	foreach ((array)$data as $root) {
		$out .= '<tr>';
		$out .= '<td class="c" rowspan="2">'.$root['id'];
		$out .= '<input type="hidden" name="data['.$root['id'].'][id]" value="'.$root['id'].'" />';
		$out .= '</td>';
		$out .= '<td class="wide" style="padding-left:'.$padding.'px;" rowspan="2">'.$root['name'].'</td>';
		$out .= cat_temp_templates($root['id'],true);
		$out .= '<td rowspan="2">'.$root['acount'].' ('.$root['count'].')</td>';
		$out .= "</tr><tr>";
		$out .= cat_temp_templates($root['id'],false);
		$out .= '</tr>';
		if (count($root['child']) >0) {
			$out .= cat_temp_td_fun($root['child'],$padding+10);
		}
	}
	return $out;
}
function cat_temp_options_page() {
	$_GET['lang'] = 'all';
	;echo '
	<div class="wrap cat-template">
		<div class="icon32" id="icon-themes"><br/>
		</div>
		<h2>模板选择器</h2>
		';
		if ($_POST['update_theme']) {
			cat_temp_update($_POST['data']);
			echo '<div id="message" class="updated"><p>成功保存.</p></div>';
		}
		;echo '  <p>请选择分类和页面模板</p>
		<form method="post" action="';echo $_SERVER['PHP_SELF']."?".$_SERVER['QUERY_STRING'];;echo '">
			';
			if(function_exists('settings_fields')){
				settings_fields('cat-temp-options');
			}else {
				wp_nonce_field('update-options');
				;echo '    <input type="hidden" name="action" value="update" />
				';
			}
			;echo '    <table>
			<tr>
				<td style="vertical-align:top" width="70%"><table width="100%" class="widefat" id="cat_temps">
					<thead>
						<tr>
							<th width="2%" class="c">ID</th>
							<th>分类</th>
							<th colspan="2">模板</th>
							<th width="4%">等级</th>
							<th>文章数</th>
						</tr>
					</thead>
					<tbody>
						';echo cat_temp_td_fun(cat_temp_categories());;echo '            </tbody>
					</table></td>
					<td style="vertical-align:top"><table width="100%" class="widefat">
						<thead>
							<tr>
								<th>说明</th>
							</tr>
							<tr>
								<td>按照以下说明制作模板:</td>
							</tr>
							<tr>
								<td>
									分类模板:
									<pre style="direction:ltr">
										<?php
										/**
										Archive Template: 分类模板名
										**/
										?>
									</pre>
								</td>
							</tr>
							<tr>
								<td>
									文章模板:
									<pre style="direction:ltr">
										<?php
										/**
										Template Name: 文章模板名
										**/
										?>
									</pre>
								</td>
							</tr>
						</thead>
					</table></td>
				</tr>
			</table>
			<p class="submit">
				<input type="submit" class="button-primary autowidth" name="update_theme" value="保存" />
			</p>
		</form>
	</div>
	';
}
add_action('admin_menu','cat_temp_menus');
add_action('save_post','cat_temp_post_submit');
add_filter('template_redirect','cat_temp');
?>

然后在functions.php 中引入这个文件即可：

include (TEMPLATEPATH . '/template.php');