Using wp_insert_post() - creates duplicates - php

Question

I am adding one CPT to another CPT dynmaically. When using wp_insert_post() it creates duplicates when I add_action('init', 'function_name'); Any idea what hook to use to simply add them:
function cpt_to_cpt(){
// Grab posts
$args = array(
'post_type' => ' custom_type1 ',
'order' => 'ASC',
'post_status' => 'publish',
'numberposts' => -1,
);
$posts = get_posts($args);
foreach ( $posts as $post ) {
wp_insert_post(array(
'post_type' => 'custom_type2',
'post_title' => $post->post_title,
'post_date' => $post->post_date,
'post_author' => $post->post->author,
'post_status' => 'publish',
)
);
}
add_action('init', 'cpt_to_cpt');

Answer 1

Try using:
wp_loaded
add_action('wp_loaded', 'cpt_to_cpt');
or
wp
add_action('wp', 'cpt_to_cpt')

Answer 2

WordPress init and wp_loaded hooks fire on the "loading" stage. It means they both can fire more than one time when refreshing the page.
Solution 1
You can use another hook that fires later.
wp hook, for instance, fires on the "processing" stage and should run only once.
add_action('wp', 'cpt_to_cpt');
Order of precedence: init 🠆 wp_loaded 🠆 wp
Solution 2
If you really want to use init hook and make sure it will run one time. You can use the snippet below.
function cpt_to_cpt() {
$runtime = 'run_only_01;
if (get_option('my_run_only_once_option') != $runtime) {
$updated = update_option('my_run_only_once_option', $runtime);
if ($updated === true) {
// do some stuff
}
}
}
add_action('init', 'cpt_to_cpt');
It will create an option on your wp_option table. In the end, you need to delete the option manually (on your database) or in your code.
delete_option('my_run_only_once_option');
Solution 3
Maybe the best professional solution to create multiple posts or CPTs (custom post types) should be using wp-cli (command line interface for WordPress).
Please take a look in the documentation here: https://developer.wordpress.org/cli/commands/post/