functions.php

<?php
$themename = "Domain For Sale";
$shortname = "dfs";
$options = array (


    array(  "name" => "Price"),

    array(  "type" => "open"),

    array(  "name" => "Price",
            "desc" => "Enter a price to sell your domain for.",
            "id" => $shortname."_price",
            "std" => "",
            "type" => "text"),

    array(  "type" => "close"),

);

function mytheme_add_admin() {

    global $themename, $shortname, $options;

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

        if ( 'save' == $_REQUEST['action'] ) {

                foreach ($options as $value) {
                    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=functions.php&saved=true");
                die;

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

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

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

        }
    }

    add_theme_page($themename." Options", "".$themename." Options", '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>';

?>

    <div class="wrap">
        <h2><?php echo $themename; ?> settings</h2>
        <form method="post">

            <?php foreach ($options as $value) {
                switch ( $value['type'] ) {
                case "open":
            ?>

            <table width="100%" border="0" style="background-color:#eef5fb; padding:10px;">

            <?php break;
                case "close":
            ?>

            </table><br />

            <?php break;
                case "title":
            ?>

            <table width="100%" border="0" style="background-color:#dceefc; padding:5px 10px;">
                <tr>
                    <td colspan="2">
                        <h3 style="font-family:Georgia,'Times New Roman',Times,serif;">
                        <?php echo $value['name']; ?>
                        </h3>
                    </td>
                </tr>

            <?php
                break;
                case 'text':
            ?>

                <tr>
                    <td width="20%" rowspan="2" valign="middle"><strong><?php echo $value['name']; ?></strong></td>
                    <td width="80%"><input style="width:400px;" 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']; } ?>" /></td>
                </tr>

                <tr>
                    <td colspan="2"><small><?php echo $value['desc']; ?></small></td>
                </tr>

                <tr>
                    <td colspan="2" style="margin-bottom:5px;border-bottom:1px dotted #000000;">&nbsp;</td>
                </tr>

                <tr>
                    <td colspan="2">&nbsp;</td>
                </tr>

            <?php
                break;
                case 'textarea':
            ?>

                <tr>
                    <td width="20%" rowspan="2" valign="middle"><strong><?php echo $value['name']; ?></strong></td>
                    <td width="80%"><textarea name="<?php echo $value['id']; ?>" style="width:400px; height:200px;" type="<?php echo $value['type']; ?>" cols="" rows=""><?php if ( get_settings( $value['id'] ) != "") { echo get_settings( $value['id'] ); } else { echo $value['std']; } ?></textarea></td>
                </tr>

                <tr>
                    <td colspan="2"><small><?php echo $value['desc']; ?></small></td>
                </tr>

                <tr>
                    <td colspan="2" style="margin-bottom:5px;border-bottom:1px dotted #000000;">&nbsp;</td>
                </tr>

                <tr>
                    <td colspan="2">&nbsp;</td>
                </tr>

                <?php
                    break;
                    case 'select':
                ?>

                <tr>
                    <td width="20%" rowspan="2" valign="middle"><strong><?php echo $value['name']; ?></strong></td>
                    <td width="80%"><select style="width:240px;" name="<?php echo $value['id']; ?>" id="<?php echo $value['id']; ?>"><?php foreach ($value['options'] as $option) { ?><option<?php if ( get_settings( $value['id'] ) == $option) { echo ' selected="selected"'; } elseif ($option == $value['std']) { echo ' selected="selected"'; } ?>><?php echo $option; ?></option><?php } ?></select></td>
                </tr>

                <tr>
                    <td><small><?php echo $value['desc']; ?></small></td>
                </tr>

                <tr>
                    <td colspan="2" style="margin-bottom:5px;border-bottom:1px dotted #000000;">&nbsp;</td>
                </tr>

                <tr>
                    <td colspan="2">&nbsp;</td>
                </tr>

            <?php
                break;
                case "checkbox":
            ?>

                <tr>
                    <td width="20%" rowspan="2" valign="middle"><strong><?php echo $value['name']; ?></strong></td>
                    <td width="80%"><? if(get_settings($value['id'])){ $checked = "checked=\"checked\""; }else{ $checked = ""; } ?>
                    <input type="checkbox" name="<?php echo $value['id']; ?>" id="<?php echo $value['id']; ?>" value="true" <?php echo $checked; ?> /></td>
                </tr>

                <tr>
                    <td colspan="2"><small><?php echo $value['desc']; ?></small></td>
                </tr>

                <tr>
                    <td colspan="2" style="margin-bottom:5px;border-bottom:1px dotted #000000;">&nbsp;</td>
                </tr>

                <tr>
                    <td colspan="2">&nbsp;</td>
                </tr>

            <?php
                break;
                }
            }
            ?>

            <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">
                <input name="reset" type="submit" value="Reset" />
                <input type="hidden" name="action" value="reset" />
            </p>
        </form>

<?php
}

add_action('admin_menu', 'mytheme_add_admin'); ?>