fr

<?php
/*
Plugin Name: Feed Refresh
Plugin URI: #
Description: Feed Refresh Beta.
Version: 0.1
Author: Dexter
Author URI: #
*/

// ------------------------------------------------------------------------
// REQUIRE MINIMUM VERSION OF WORDPRESS:
// ------------------------------------------------------------------------
// THIS IS USEFUL IF YOU REQUIRE A MINIMUM VERSION OF WORDPRESS TO RUN YOUR
// PLUGIN. IN THIS PLUGIN THE WP_EDITOR() FUNCTION REQUIRES WORDPRESS 3.3
// OR ABOVE. ANYTHING LESS SHOWS A WARNING AND THE PLUGIN IS DEACTIVATED.
// ------------------------------------------------------------------------

function fr_requires_wordpress_version() {
    global $wp_version;
    $plugin = plugin_basename( __FILE__ );
    $plugin_data = get_plugin_data( __FILE__, false );

    if ( version_compare($wp_version, "3.3", "<" ) ) {
        if( is_plugin_active($plugin) ) {
            deactivate_plugins( $plugin );
            wp_die( "'".$plugin_data['Name']."' requires WordPress 3.3 or higher, and has been deactivated! Please upgrade WordPress and try again.<br /><br />Back to <a href='".admin_url()."'>WordPress admin</a>." );
        }
    }
}
add_action( 'admin_init', 'fr_requires_wordpress_version' );

// ------------------------------------------------------------------------
// PLUGIN PREFIX:
// ------------------------------------------------------------------------
// A PREFIX IS USED TO AVOID CONFLICTS WITH EXISTING PLUGIN FUNCTION NAMES.
// WHEN CREATING A NEW PLUGIN, CHANGE THE PREFIX AND USE YOUR TEXT EDITORS
// SEARCH/REPLACE FUNCTION TO RENAME THEM ALL QUICKLY.
// ------------------------------------------------------------------------

// 'fr_' prefix is derived from [p]plugin [o]ptions [s]tarter [k]it

// ------------------------------------------------------------------------
// REGISTER HOOKS & CALLBACK FUNCTIONS:
// ------------------------------------------------------------------------
// HOOKS TO SETUP DEFAULT PLUGIN OPTIONS, HANDLE CLEAN-UP OF OPTIONS WHEN
// PLUGIN IS DEACTIVATED AND DELETED, INITIALISE PLUGIN, ADD OPTIONS PAGE.
// ------------------------------------------------------------------------

// Set-up Action and Filter Hooks
register_activation_hook(__FILE__, 'fr_add_defaults');
register_uninstall_hook(__FILE__, 'fr_delete_plugin_options');
add_action('admin_init', 'fr_init' );
add_action('admin_menu', 'fr_add_options_page');
add_filter( 'plugin_action_links', 'fr_plugin_action_links', 10, 2 );

// --------------------------------------------------------------------------------------
// CALLBACK FUNCTION FOR: register_uninstall_hook(__FILE__, 'fr_delete_plugin_options')
// --------------------------------------------------------------------------------------
// THIS FUNCTION RUNS WHEN THE USER DEACTIVATES AND DELETES THE PLUGIN. IT SIMPLY DELETES
// THE PLUGIN OPTIONS DB ENTRY (WHICH IS AN ARRAY STORING ALL THE PLUGIN OPTIONS).
// --------------------------------------------------------------------------------------

// Delete options table entries ONLY when plugin deactivated AND deleted
function fr_delete_plugin_options() {
    delete_option('fr_options');
}

// ------------------------------------------------------------------------------
// CALLBACK FUNCTION FOR: register_activation_hook(__FILE__, 'fr_add_defaults')
// ------------------------------------------------------------------------------
// THIS FUNCTION RUNS WHEN THE PLUGIN IS ACTIVATED. IF THERE ARE NO THEME OPTIONS
// CURRENTLY SET, OR THE USER HAS SELECTED THE CHECKBOX TO RESET OPTIONS TO THEIR
// DEFAULTS THEN THE OPTIONS ARE SET/RESET.
//
// OTHERWISE, THE PLUGIN OPTIONS REMAIN UNCHANGED.
// ------------------------------------------------------------------------------

// Define default option settings
function fr_add_defaults() {
    $tmp = get_option('fr_options');
    if(($tmp['chk_default_options_db']=='1')||(!is_array($tmp))) {
        delete_option('fr_options'); // so we don't have to reset all the 'off' checkboxes too! (don't think this is needed but leave for now)
        $arr = array(
            "txt_1" => "Enter whatever you like here..",
            "txt_2" => "Enter whatever you like here..",
            "txt_3" => "Enter whatever you like here..",
            "txt_4" => "Enter whatever you like here..",
            "txt_5" => "Enter whatever you like here.."
        );
        update_option('fr_options', $arr);
    }
}

// ------------------------------------------------------------------------------
// CALLBACK FUNCTION FOR: add_action('admin_init', 'fr_init' )
// ------------------------------------------------------------------------------
// THIS FUNCTION RUNS WHEN THE 'admin_init' HOOK FIRES, AND REGISTERS YOUR PLUGIN
// SETTING WITH THE WORDPRESS SETTINGS API. YOU WON'T BE ABLE TO USE THE SETTINGS
// API UNTIL YOU DO.
// ------------------------------------------------------------------------------

// Init plugin options to white list our options
function fr_init(){
    register_setting( 'fr_plugin_options', 'fr_options', 'fr_validate_options' );
}

// ------------------------------------------------------------------------------
// CALLBACK FUNCTION FOR: add_action('admin_menu', 'fr_add_options_page');
// ------------------------------------------------------------------------------
// THIS FUNCTION RUNS WHEN THE 'admin_menu' HOOK FIRES, AND ADDS A NEW OPTIONS
// PAGE FOR YOUR PLUGIN TO THE SETTINGS MENU.
// ------------------------------------------------------------------------------

// Add menu page
function fr_add_options_page() {
    add_menu_page('Feed Refresh Options Page', 'Feed Refresh', 'manage_options', __FILE__, 'fr_render_form');
}

// ------------------------------------------------------------------------------
// CALLBACK FUNCTION SPECIFIED IN: add_options_page()
// ------------------------------------------------------------------------------
// THIS FUNCTION IS SPECIFIED IN add_options_page() AS THE CALLBACK FUNCTION THAT
// ACTUALLY RENDER THE PLUGIN OPTIONS FORM AS A SUB-MENU UNDER THE EXISTING
// SETTINGS ADMIN MENU.
// ------------------------------------------------------------------------------

// Render the Plugin options form
function fr_render_form() {
    ?>
    <div class="wrap">

        <!-- Display Plugin Icon, Header, and Description -->
        <div class="icon32" id="icon-options-general"><br></div>
        <h2>Plugin Options Starter Kit</h2>
        <p>Below is a collection of sample controls you can use in your own Plugins. Or, you can analyse the code and learn how all the most common controls can be added to a Plugin options form. See the code for more details, it is fully commented.</p>

        <!-- Beginning of the Plugin Options Form -->
        <form method="post" action="options.php">
            <?php settings_fields('fr_plugin_options'); ?>
            <?php $options = get_option('fr_options'); ?>

            <!-- Table Structure Containing Form Controls -->
            <!-- Each Plugin Option Defined on a New Table Row -->
            <table class="form-table">

                <!-- Textbox Control -->
                <tr><th scope="row">Track 1</th><td><input type="text" size="200" name="fr_options[txt_1]" value="<?php echo $options['txt_1']; ?>" /></td></tr>
                <tr><th scope="row">Track 2</th><td><input type="text" size="200" name="fr_options[txt_2]" value="<?php echo $options['txt_2']; ?>" /></td></tr>
                <tr><th scope="row">Track 3</th><td><input type="text" size="200" name="fr_options[txt_3]" value="<?php echo $options['txt_3']; ?>" /></td></tr>
                <tr><th scope="row">Track 4</th><td><input type="text" size="200" name="fr_options[txt_4]" value="<?php echo $options['txt_4']; ?>" /></td></tr>
                <tr><th scope="row">Track 5</th><td><input type="text" size="200" name="fr_options[txt_5]" value="<?php echo $options['txt_5']; ?>" /></td></tr>

                <tr><td colspan="2"><div style="margin-top:10px;"></div></td></tr>
                <tr valign="top" style="border-top:#dddddd 1px solid;">
                    <th scope="row">Database Options</th>
                    <td>
                        <label><input name="fr_options[chk_default_options_db]" type="checkbox" value="1" <?php if (isset($options['chk_default_options_db'])) { checked('1', $options['chk_default_options_db']); } ?> /> Restore defaults upon plugin deactivation/reactivation</label>
                        <br /><span style="color:#666666;margin-left:2px;">Only check this if you want to reset plugin settings upon Plugin reactivation</span>
                    </td>
                </tr>
            </table>
            <p class="submit">
            <input type="submit" class="button-primary" value="<?php _e('Save Changes') ?>" />
            </p>
        </form>

        <p style="margin-top:15px;">
            <p style="font-style: italic;font-weight: bold;color: #26779a;">If you have found this starter kit at all useful, please consider making a <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=XKZXD2BHQ5UB2" target="_blank" style="color:#72a1c6;">donation</a>. Thanks.</p>
            <span><a href="http://www.facebook.com/PressCoders" title="Our Facebook page" target="_blank"><img style="border:1px #ccc solid;" src="<?php echo plugins_url(); ?>/feed-refresh/images/facebook-icon.png" /></a></span>
            &nbsp;&nbsp;<span><a href="http://www.twitter.com/dgwyer" title="Follow on Twitter" target="_blank"><img style="border:1px #ccc solid;" src="<?php echo plugins_url(); ?>/feed-refresh/images/twitter-icon.png" /></a></span>
            &nbsp;&nbsp;<span><a href="http://www.presscoders.com" title="PressCoders.com" target="_blank"><img style="border:1px #ccc solid;" src="<?php echo plugins_url(); ?>/feed-refresh/images/pc-icon.png" /></a></span>
        </p>

    </div>
    <?php
}

// Sanitize and validate input. Accepts an array, return a sanitized array.
function fr_validate_options($input) {
     // strip html from textboxes
    $input['txt_1'] =  wp_filter_nohtml_kses($input['txt_1']); // Sanitize textbox input (strip html tags, and escape characters)
    $input['txt_2'] =  wp_filter_nohtml_kses($input['txt_2']); // Sanitize textbox input (strip html tags, and escape characters)
    $input['txt_3'] =  wp_filter_nohtml_kses($input['txt_3']); // Sanitize textbox input (strip html tags, and escape characters)
    $input['txt_4'] =  wp_filter_nohtml_kses($input['txt_4']); // Sanitize textbox input (strip html tags, and escape characters)
    $input['txt_5'] =  wp_filter_nohtml_kses($input['txt_5']); // Sanitize textbox input (strip html tags, and escape characters)
    return $input;
}

// Display a Settings link on the main Plugins page
function fr_plugin_action_links( $links, $file ) {

    if ( $file == plugin_basename( __FILE__ ) ) {
        $fr_links = '<a href="'.get_admin_url().'admin.php?page=feed-refresh/feed-refresh.php">'.__('Settings').'</a>';
        // make the 'Settings' link appear first
        array_unshift( $links, $fr_links );
    }

    return $links;
}

// ------------------------------------------------------------------------------
// SAMPLE USAGE FUNCTIONS:
// ------------------------------------------------------------------------------
// THE FOLLOWING FUNCTIONS SAMPLE USAGE OF THE PLUGINS OPTIONS DEFINED ABOVE. TRY
// CHANGING THE DROPDOWN SELECT BOX VALUE AND SAVING THE CHANGES. THEN REFRESH
// A PAGE ON YOUR SITE TO SEE THE UPDATED VALUE.
// ------------------------------------------------------------------------------


add_action('admin_init', 'feeds');
function feeds() {
    $options = get_option('fr_options');
    $arr = array(
            $options['txt_1'],
            $options['txt_2'],
            $options['txt_3'],
            $options['txt_4'],
            $options['txt_5']
        );

    $filename = plugin_dir_path(__FILE__) . "test.php";
    $text = "";
    foreach($arr as $value)
    {
        $text .= $value."\n";
    }
    $fh = fopen($filename, "w") or die("Could not open file.");
    fwrite($fh, $text) or die("Could not write file!");
    fclose($fh);
}