PHP

wordpress create shortcode

function create_shortcode(){
    return "<h2>Hello world !</h2>";
}
add_shortcode('my_shortcode', 'create_shortcode');
// Use [my_shortcode]

how to use plugin shortcode in wordpress template

<?php echo do_shortcode("[insert-your-shortcode-here]"); ?>

generate shortcode wordpress plugin

add_filter( 'widget_text', 'shortcode_unautop' );
add_filter( 'widget_text', 'do_shortcode' );