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categories.php
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categories.php
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<?php
// Function to handle the Categories admin page
function bt_manage_categories()
{
global $wpdb;
if ( current_user_can('manage_options') )
{
$action = !empty( $_REQUEST['action']) ? $_REQUEST['action'] : '';
$cat_id = !empty( $_REQUEST['cat_id']) ? $_REQUEST['cat_id'] : '';
if ( $action == 'add' )
{
$cat_name = !empty( $_REQUEST['cat_name']) ? $wpdb->escape(trim($_REQUEST['cat_name'])) : '';
$cat_link = !empty( $_REQUEST['cat_link']) ? $wpdb->escape(trim($_REQUEST['cat_link'])) : '';
// Validate
if ( mb_strlen($cat_name, 'UTF-8') == 0 || mb_strlen($cat_name, 'UTF-8') > 10 )
{
echo '<div class="error"><p><strong>錯誤：</strong>分類名稱需有至少1字，至多10字</p></div>';
$cat_name_ok = 0;
} else {
$cat_name_ok = 1;
}
if ( $cat_link != '' && preg_match('/^https?\:\/\//', $cat_link) && !preg_match('/^https?\:\/\/$/', $cat_link) )
{
$cat_link_ok = 1;
}
elseif ( empty($i[0]) && empty($i[1]) )
{
$cat_link_ok = 1;
} else {
$cat_link_ok = 0;
echo '<div class="error"><p><strong>錯誤：</strong>連結需為 http:// 或 https:// 開頭，或為空白</p></div>';
return false;
break;
}
// Operate the database if everything's alright
if ( $cat_name_ok == 1 && $cat_link_ok == 1)
{
$sql = "INSERT INTO " . WP_BTAEON_CATEGORIES_TABLE . " SET
category_name='$cat_name', category_link='$cat_link'";
$wpdb->get_results($sql);
$sql = "SELECT category_id FROM " . WP_BTAEON_CATEGORIES_TABLE . " WHERE
category_name='$cat_name' AND category_link='$cat_link' LIMIT 1";
$result = $wpdb->get_results($sql);
if ( empty($result) )
{
echo '<div class="error"><p>我找在資料庫中不到您剛剛送出的資料，資料庫可能出問題了</p></div>';
} else {
echo '<div class="updated"><p>分類新增成功！</p></div>';
}
} else {
// Preserve user entry
$user_entries->category_name = $cat_name;
$user_entries->category_link = $cat_link;
}
} elseif ( $action == 'edit_save' ) {
$cat_name = !empty( $_REQUEST['cat_name']) ? $wpdb->escape(trim($_REQUEST['cat_name'])) : '';
$cat_link = !empty( $_REQUEST['cat_link']) ? $wpdb->escape(trim($_REQUEST['cat_link'])) : '';
// Validate
if ( mb_strlen($cat_name, 'UTF-8') == 0 || mb_strlen($cat_name, 'UTF-8') > 10 )
{
echo '<div class="error"><p><strong>錯誤：</strong>分類名稱需有至少1字，至多10字</p></div>';
$cat_name_ok = 0;
} else {
$cat_name_ok = 1;
}
if ( $cat_link != '' && preg_match('/^https?\:\/\//', $cat_link) && !preg_match('/^https?\:\/\/$/', $cat_link) )
{
$cat_link_ok = 1;
}
elseif ( empty($i[0]) && empty($i[1]) )
{
$cat_link_ok = 1;
} else {
$cat_link_ok = 0;
echo '<div class="error"><p><strong>錯誤：</strong>連結需為 http:// 或 https:// 開頭，或為空白</p></div>';
return false;
break;
}
// Operate the database if everything's alright
if ( $cat_name_ok == 1 && $cat_link_ok == 1)
{
$sql = "UPDATE " . WP_BTAEON_CATEGORIES_TABLE . " SET
category_name='$cat_name', category_link='$cat_link' WHERE category_id='$cat_id'";
$wpdb->get_results($sql);
echo '<div class="updated"><p>' . $sql . '</p></div>';
$sql = "SELECT category_id FROM " . WP_BTAEON_CATEGORIES_TABLE . " WHERE
category_name='$cat_name' AND category_link='$cat_link' LIMIT 1";
echo '<div class="updated"><p>' . $cat_name . '</p></div>';
$result = $wpdb->get_results($sql);
if ( empty($result) )
{
echo '<div class="error"><p>我找在資料庫中不到您剛剛送出的資料，資料庫可能出問題了</p></div>';
} else {
echo '<div class="updated"><p>分類編輯成功！</p></div>';
}
} else {
// Preserve user entry
$user_entries->category_name = $cat_name;
$user_entries->category_link = $cat_link;
$error_with_saving = 1;
}
} elseif ( $action == 'delete' ) {
if ( empty($cat_id) )
{
echo '<div class="error"><p>您不能刪除不存在的公告</p></div>';
} else {
$sql = "DELETE FROM " . WP_BTAEON_CATEGORIES_TABLE . " WHERE category_id='$cat_id'";
$wpdb->query($sql);
$sql = "SELECT * FROM " . WP_BTAEON_CATEGORIES_TABLE . " WHERE category_id='$cat_id'";
$result = $wpdb->get_results($sql);
if ( empty($result) )
{
echo '<div class="updated"><p>分類刪除成功！</p></div>';
} else {
echo '<div class="error"><p><strong>錯誤：</strong>儘管已經發出刪除命令，該分類在資料庫中依然存在。</p></div>';
}
}
}
// Now follows a little bit of code that pulls in the main components of this page; the edit form and the list of categories
echo '<div class="wrap">';
if ( $action == 'edit' || ($action == 'edit_save' && $error_with_saving == 1))
{
echo '<h2>編輯分類</h2>';
if ( empty($cat_id) )
{
echo '<div class="error"><p>您並未指定分類 ID </p></div>';
} else {
bt_cats_edit_form('edit_save', $cat_id);
}
} else {
echo '<h2>新增分類</h2>';
bt_cats_edit_form();
echo '<h2>管理分類</h2>';
bt_cats_display();
}
echo '</div>';
} else {
echo '<div class="error"><p><strong>錯誤：</strong>您沒有權限檢視此頁</p></div>';
}
}
// The edit form
function bt_cats_edit_form( $mode = 'add', $cat_id = false )
{
global $wpdb, $user_entries;
$data = false;
if ( $cat_id != false )
{
if ( intval($cat_id) != $cat_id )
{
echo '<div class="error"><p>不乖！</p></div>';
return;
} else {
$data = $wpdb->get_results("SELECT * FROM " . WP_BTAEON_CATEGORIES_TABLE . " WHERE category_id='$cat_id' LIMIT 1");
if ( empty($data) )
{
echo '<div class="error"><p>找不到該分類</p></div>';
return;
}
$data = $data[0];
}
// Recover user entry
if ( !empty($user_entries) )
{
$data = $user_entries;
}
} else {
$data = $user_entries;
}
?>
<form name="catform" id="catform" class="wrap" method="post" action="<?php echo bloginfo('wpurl'); ?>/wp-admin/admin.php?page=btcat">
<input type="hidden" name="action" value="<?php echo $mode; ?>" />
<input type="hidden" name="cat_id" value="<?php echo $cat_id; ?>" />
<div id="linkadvanceddiv" class="postbox">
<div class="inside">
<p class="inside-text"><span>分類名稱</span>
<input type="text" name="cat_name" class="input" size="13" maxlength="10" value="<?php if ( !empty($data) ) echo $data->category_name; ?>" /></p>
<p class="inside-text"><span>分類連結</span>
<input type="text" name="cat_link" class="input" size="60" value="<?php if ( !empty($data) ) echo $data->category_link; ?>" /></p>
</div>
</div>
<input type="submit" name="save" class="button bold" value="儲存 »" />
</form>
<?php
}
// Show all categories
function bt_cats_display()
{
global $wpdb;
// Grab from the database
$sql = 'SELECT * FROM ' . WP_BTAEON_CATEGORIES_TABLE . ' ORDER BY category_id DESC';
$cats = $wpdb->get_results($sql);
if ( !empty($cats) )
{
?>
<table class="widefat page fixed" width="100%" cellpadding="3" cellspacing="3">
<thead>
<tr>
<th width="3%" class="manage-column" scope="col">ID</th>
<th class="manage-column" scope="col">分類名稱</th>
<th class="manage-column" scope="col">分類連結（「更多」）</th>
<th width="3%" class="manage-column" scope="col">編輯</th>
<th width="3%" class="manage-column" scope="col">刪除</th>
</tr>
</thead>
<?php
foreach ( $cats as $cat )
{
?>
<tr>
<th scope="row"><?php echo stripslashes($cat->category_id); ?></th>
<td><?php echo stripslashes($cat->category_name); ?></td>
<td><?php echo '<a href="', stripslashes($cat->category_link), '">', stripslashes($cat->category_link), '</a>'; ?></td>
<td><a href="<?php bloginfo('wpurl'); ?>/wp-admin/admin.php?page=btcat&action=edit&cat_id=<?php echo stripslashes($cat->category_id);?>" class='edit'>編輯</a></td>
<td><a href="<?php bloginfo('wpurl'); ?>/wp-admin/admin.php?page=btcat&action=delete&cat_id=<?php echo stripslashes($cat->category_id);?>" class="delete" onclick="return confirm(您確定要刪除此分類？)">刪除</a></td>
</tr>
<?php
}
echo '</table>';
} else {
echo '<p>資料庫中沒有分類</p>';
}
}
?>