source: trunk/www.guidonia.net/wp/wp-content/themes/slickpress/settings.php@ 44

<?php

$settings = array(
        'youtube' => 'H5h95s0OuEg',
        "gravatar"=>"enabled",
        "gravatar_fallback"=>"identicon",
);

# Settings

$themename = "SlickPress Theme";
$shortname = "slickpress";
$options = array (

        array(  "name" => "Main Settings",
                        "type" => "header"
        ),

        array(  "name" => "Youtube Video ID",
            "id" => $shortname."_youtube",
            "std" => $settings['youtube'],
            "type" => "text",
                        "note" => "<strong>Example: </strong> http://www.youtube.com/watch?v=<strong style='color: #ff0000;'>H5h95s0OuEg</strong>"),
                        
        array(  "name" => "Gravatars",
            "id" => $shortname."_gravatar",
            "std" => $settings['gravatar'],
            "type" => "select",
                        "options" => array(0=>'enabled', 1=>'disabled')),
                        
        array(  "name" => "Gravatar Fallback",
            "id" => $shortname."_gravatar_fallback",
            "std" => $settings['gravatar_fallback'],
            "type" => "text",
                        "note" => "<strong>Example: </strong> monsterid, identicon, etc."),
                        
);

function mytheme_add_admin() {

    global $themename, $shortname, $options;

    if ( $_GET['page'] == basename(__FILE__) ) {
    
        if ( 'save' == $_REQUEST['action'] ) {

                foreach ($options as $value) {
                                        if ($value['type']!='header') {
                                                update_option( $value['id'], $_REQUEST[ $value['id'] ] );
                                        }
                                }

                foreach ($options as $value) {
                    if( isset( $_REQUEST[ $value['id'] ] ) ) { update_option( $value['id'], $_REQUEST[ $value['id'] ]  ); } else { delete_option( $value['id'] ); } }

                header("Location: themes.php?page=settings.php&saved=true");
                die;

        } else if( 'reset' == $_REQUEST['action'] ) {

            foreach ($options as $value) {
                delete_option( $value['id'] ); }

            header("Location: themes.php?page=settings.php&reset=true");
            die;

        }
    }

    add_theme_page($themename." Settings", "Theme Settings", 'edit_themes', basename(__FILE__), 'mytheme_admin');

}

function mytheme_admin() {

    global $themename, $shortname, $options;

    if ( $_REQUEST['saved'] ) echo '<div id="message" class="updated fade"><p><strong>'.$themename.' settings saved.</strong></p></div>';
    if ( $_REQUEST['reset'] ) echo '<div id="message" class="updated fade"><p><strong>'.$themename.' settings reset.</strong></p></div>';
    
?>
<style type="text/css">
th {
        text-align: left;
}
td {
        padding: 5px 10px !important;
}
tr.header {
        background-color: #99CC66 !important;
        color: #ffffff;
}
.header td {
        padding: 2px 10px !important;
        font-size: 14px !important;
        font-weight: bold !important;
}
</style>
<div class="wrap">
<h2><?php echo $themename; ?> Settings</h2>

<form method="post">

<table class="form-table">

<?php foreach ($options as $value) { 
    
if ($value['type'] == "text") { ?>
        
<tr> 
    <th scope="row" style="width: 25%"><?php echo $value['name']; ?>:</th>
    <td>
        <input onfocus="this.select();" name="<?php echo $value['id']; ?>" id="<?php echo $value['id']; ?>" type="<?php echo $value['type']; ?>" value="<?php if ( get_settings( $value['id'] ) != "") { echo get_settings( $value['id'] ); } else { echo $value['std']; } ?>" />
                &nbsp; &nbsp; <?php echo $value['note']; ?>
    </td>
</tr>

<?php } elseif ($value['type'] == "select") { ?>

    <tr> 
        <th scope="row"><?php echo $value['name']; ?>:</th>
        <td>
            <select name="<?php echo $value['id']; ?>" id="<?php echo $value['id']; ?>">
                <?php foreach ($value['options'] as $option) { ?>
                <option value="<?php echo $option; ?>" <?php if ( get_settings( $value['id'] ) == $option) { echo ' selected="selected"'; } elseif ($option == $value['std']) { echo ' selected="selected"'; } ?>><?php echo $option; ?></option>
                <?php } ?>
            </select>
                        &nbsp; &nbsp; <?php echo $value['note']; ?>
        </td>
    </tr>

<?php 
} elseif ($value['type'] == "header") {?>

        <tr class="header"><td colspan="2"><?php  echo $value['name'] ?> &nbsp; &nbsp; <span style="font-size: 11px; font-weight: normal;"><?php echo $value['note']; ?></span></td></tr>
        
<?php 
} 
}
?>

</table>

<p class="submit">
<input name="save" type="submit" value="Save changes" />    
<input type="hidden" name="action" value="save" />
</p>
</form>
<form method="post">
<p class="submit" style="border: 0;">
<input name="reset" type="submit" value="Reset" />
<input type="hidden" name="action" value="reset" />
</p>
</form>

<?php
}

add_action('admin_menu', 'mytheme_add_admin');

foreach ($options as $value) {
if (get_settings( $value['id'] ) === FALSE) { $$value['id'] = $value['std']; } else { $$value['id'] = get_settings( $value['id'] ); } }


# Set Values
foreach ($settings as $k=>$v) {
        $var = $shortname.'_'.$k;
        if (!empty($$var)) $settings[$k] = $$var;
}

?>