WordPress Action Hook Example

example.php

<?php

// https://stackoverflow.com/questions/26781857/how-do-do-action-and-add-action-work

do_action( 'my_footer_hook' );

add_action( 'my_footer_hook', 'my_footer_echo' );
function my_footer_echo(){
    echo 'hello world';
}

simle_hook_example.php

<?php 
/**
* Creating an action Hook for Worpdress
* call action liek so do_action( 'zipfooter_credit' );
*/
if ( ! function_exists( 'zipteq_footer_credit_info' ) ) :

    function zip_footer_credit_info(){

        $footer_credit = '<div class="site-info">';
        $footer_credit .= get_bloginfo( 'name' );
        $footer_credit .= ' - ' .get_bloginfo( 'description' );
        $footer_credit .= '</div><!-- .site-info -->';
        echo $footer_credit;
    }

endif;

add_action( 'zipfooter_credit', 'zip_footer_credit_info', 10 );