Hamburger Menu Animation Effects PHP

hamburger-menu-animation-effects-php

add_shortcode( 'hamburger_animation_icon', 'custom_hamburger_animation_icon_shortcode' );
function custom_hamburger_animation_icon_shortcode() {
    ob_start();
    custom_hamburger_animation_icon_content();
    $output_string = ob_get_contents();
    ob_end_clean();
    return $output_string;
}

function custom_hamburger_animation_icon_content() { ?>
<div class="responsive-menu-icon">
    <div class="hamburger" id="hamburger-1">
        <span class="line"></span>
        <span class="line"></span>
        <span class="line"></span>
    </div>
</div>
<?php
}