The code for this plugin is actually pretty simple. The init function loops through all the sidebars (stored in the wp_options table) and registers them in wordpress:
<?php
function init(){
//go through each sidebar and register it
$sidebars = sidebar_generator::get_sidebars();
if(is_array($sidebars)){
foreach($sidebars as $sidebar){
$sidebar_class = sidebar_generator::name_to_class($sidebar);
register_sidebar(array(
'name'=>$sidebar,
'before_widget' => '<li id="%1$s" class="widget sbg_widget '.$sidebar_class.' %2$s">',
'after_widget' => '</li>',
'before_title' => '<h2 class="widgettitle sbg_title">',
'after_title' => '</h2>',
));
}
}
}
?>
The sidebars are added/removed with the add_sidebar() and remove_sidebar() methods respectively. The $_POST['sidebar_name'] gets stored in the $name variable as the sidebars name:
<?php
function add_sidebar(){
$sidebars = sidebar_generator::get_sidebars();
$name = str_replace(array("\n","\r","\t"),'',$_POST['sidebar_name']);
$id = sidebar_generator::name_to_class($name);
if(isset($sidebars[$id])){
die("alert('Sidebar already exists, please use a different name.')");
}
$sidebars[$id] = $name;
sidebar_generator::update_sidebars($sidebars);
$js = "
var tbl = document.getElementById('sbg_table');
var lastRow = tbl.rows.length;
// if there's no header row in the table, then iteration = lastRow + 1
var iteration = lastRow;
var row = tbl.insertRow(lastRow);
// left cell
var cellLeft = row.insertCell(0);
var textNode = document.createTextNode('$name');
cellLeft.appendChild(textNode);
//middle cell
var cellLeft = row.insertCell(1);
var textNode = document.createTextNode('$id');
cellLeft.appendChild(textNode);
//var cellLeft = row.insertCell(2);
//var textNode = document.createTextNode('[<a href=\'javascript:void(0);\' onclick=\'return remove_sidebar_link($name);\'>Remove</a>]');
//cellLeft.appendChild(textNode)
var cellLeft = row.insertCell(2);
removeLink = document.createElement('a');
linkText = document.createTextNode('remove');
removeLink.setAttribute('onclick', 'remove_sidebar_link(\'$name\')');
removeLink.setAttribute('href', 'javacript:void(0)');
removeLink.appendChild(linkText);
cellLeft.appendChild(removeLink);
";
die( "$js");
}
function remove_sidebar(){
$sidebars = sidebar_generator::get_sidebars();
$name = str_replace(array("\n","\r","\t"),'',$_POST['sidebar_name']);
$id = sidebar_generator::name_to_class($name);
if(!isset($sidebars[$id])){
die("alert('Sidebar does not exist.')");
}
$row_number = $_POST['row_number'];
unset($sidebars[$id]);
sidebar_generator::update_sidebars($sidebars);
$js = "
var tbl = document.getElementById('sbg_table');
tbl.deleteRow($row_number)
";
die($js);
}
?>
The sidebars are loaded and registered into the theme with the get_sidebar method
<?php
function get_sidebar($name="0"){
if(!is_singular()){
if($name != "0"){
dynamic_sidebar($name);
}else{
dynamic_sidebar();
}
return;//dont do anything
}
global $wp_query;
$post = $wp_query->get_queried_object();
$selected_sidebar = get_post_meta($post->ID, 'sbg_selected_sidebar', true);
$selected_sidebar_replacement = get_post_meta($post->ID, 'sbg_selected_sidebar_replacement', true);
$did_sidebar = false;
//this page uses a generated sidebar
if($selected_sidebar != '' && $selected_sidebar != "0"){
echo "\n\n<!-- begin generated sidebar -->\n";
if(is_array($selected_sidebar) && !empty($selected_sidebar)){
for($i=0;$i<sizeof($selected_sidebar);$i++){
if($name == "0" && $selected_sidebar[$i] == "0" && $selected_sidebar_replacement[$i] == "0"){
//echo "\n\n<!-- [called $name selected {$selected_sidebar[$i]} replacement {$selected_sidebar_replacement[$i]}] -->";
dynamic_sidebar();//default behavior
$did_sidebar = true;
break;
}elseif($name == "0" && $selected_sidebar[$i] == "0"){
//we are replacing the default sidebar with something
//echo "\n\n<!-- [called $name selected {$selected_sidebar[$i]} replacement {$selected_sidebar_replacement[$i]}] -->";
dynamic_sidebar($selected_sidebar_replacement[$i]);//default behavior
$did_sidebar = true;
break;
}elseif($selected_sidebar[$i] == $name){
//we are replacing this $name
//echo "\n\n<!-- [called $name selected {$selected_sidebar[$i]} replacement {$selected_sidebar_replacement[$i]}] -->";
$did_sidebar = true;
dynamic_sidebar($selected_sidebar_replacement[$i]);//default behavior
break;
}
//echo "<!-- called=$name selected={$selected_sidebar[$i]} replacement={$selected_sidebar_replacement[$i]} -->\n";
}
}
if($did_sidebar == true){
echo "\n<!-- end generated sidebar -->\n\n";
return;
}
//go through without finding any replacements, lets just send them what they asked for
if($name != "0"){
dynamic_sidebar($name);
}else{
dynamic_sidebar();
}
echo "\n<!-- end generated sidebar -->\n\n";
return;
}else{
if($name != "0"){
dynamic_sidebar($name);
}else{
dynamic_sidebar();
}
}
}
?>
We actually load the sidebar array from the wp_options table with the following:
<?php
function get_sidebars(){
$sidebars = get_option('sbg_sidebars');
return $sidebars;
}
?>
This code is really pretty simple once you know PHP, so may I suggest taking a little time to become more familiar with it? It really is a great skill to have. Hopefully this helps point you in the right direction.
