PHP

wordpress create shortcode

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

wordpress do shortcode

<?php echo do_shortcode('[name_of_shortcode parameters=""]'); ?>

how to use plugin shortcode in wordpress template

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

wordpress shortcode

function wp_demo_shortcode() { 

//Turn on output buffering
ob_start();
$code = 'Hello World';
ob_get_clean();

 // Output needs to be return
return $code;
} 

// register shortcode
add_shortcode('helloworld', 'wp_demo_shortcode'); 

generate shortcode wordpress plugin

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