Simple Shortcode

You can add the code to your functions.php file or a plugin like Code Snippets. It will create a “Simple Shortcode” option on the left side admin menu bar. Clicking that will take you to an admin page where you will be able to enter the next location text. The shortcode to place the text is simpsc-location.

As the shortcode will currently render (if its still Tuesday where you are), “The next location is announced on Wednesday,” you will need to take today’s day out of the array, $simpsc_date_array_one to test the code.

//Add admin page
add_action( 'admin_menu', 'simpsc_add_options' );

function simpsc_add_options() {
    add_menu_page(
        __( 'Simple Shortcode', 'textdomain' ),
        __( 'Simple Shortcode', 'textdomain' ),
        'manage_options',
        'simple-shortcode-options',
        'simple_shortcode_options'
    );
}

function simple_shortcode_options() {
    $simpsc_next = get_option( '_simpsc_next' );
    ?>
    <form class="simpsc-form" action="<?php echo esc_url( site_url() ); ?>/wp-admin/admin-post.php" method="post" enctype="multipart/form-data">
        <input type="hidden" name="action" value="process_simpsc">
        <?php wp_nonce_field( 'simpsc_options', 'simpsc' ); ?>
        <label>Next Location:</label>
        <input type="text" name="simpsc-next" value="<?php if ( $simpsc_next ) { echo esc_html( $simpsc_next ); } ?>">
        <input type="submit" value="Save">
<?php }

//Add admin CSS
add_action( 'admin_head', 'simpsc_add_admin_css' );

function simpsc_add_admin_css() { ?>
    <style>
        .simpsc-form {
            margin: 20px;
        }
    </style>
<?php }

add_shortcode( 'simpsc-location', 'simpsc_location');

function simpsc_location() {
    $simpsc_next = get_option( '_simpsc_next' );
    $simpsc_date_array_one = array( 'Sunday', 'Monday', 'Tuesday' );
    $simpsc_date = date( 'l' );
    if ( in_array( $simpsc_date, $simpsc_date_array_one ) ) {
        $html = "<p>The next location is announced on Wednesday<p>";
    }
    else {
        $html ="<p>Next Week's location is " . $simpsc_next . "</p>";
    }
    return $html;
}

//Process form
add_action( 'admin_post_process_simpsc', 'process_simpsc' );
add_action( 'admin_post_nopriv_process_simpsc', 'process_simpsc' );

function process_simpsc() {

if ( ! wp_verify_nonce( $_POST['simpsc'], 'simpsc_options' ) ) {
    return;
}

if ( $_POST['simpsc-next'] ) {
    $simpsc_location = $_POST['simpsc-next'];
    update_option( '_simpsc_next', $simpsc_location );
}

wp_safe_redirect( site_url() . '/wp-admin/admin.php?page=simple-shortcode-options' ); exit();	
}