<?php

// [h1]
function h1($atts, $content = null) {
    $defaults = array('align' => '', 'color' => '');
    extract( shortcode_atts( $defaults, $atts ) );
    $tag_class = '';
    $tag_class .= !empty($align) ? " {$align}" : '';
    $tag_class .= !empty($color) ? " {$color}" : '';

    ob_start(); ?>
        <h1 class="<?php echo $tag_class;?>"><?php echo do_shortcode($content); ?></h1>
    <?php $output = ob_get_clean();
    return $output;
}
add_shortcode('h1', 'h1');

?>