Response to Mohit Manderna on Formidable Community Forum

save_post_url_to_hidden_field.php

<?php

add_action( 'frm_after_create_entry', 'save_post_url_to_hidden_field', 30, 2 );
function save_post_url_to_hidden_field( $entry_id, $form_id ) {
	// Replace with your actual form ID
	if ( $form_id != 42 ) {
		return;
	}

	// Get the entry object, with meta
	$entry = FrmEntry::getOne( $entry_id, true );

	// Ensure a post was created
	if ( empty( $entry->post_id ) ) {
		return;
	}

	// Get the permalink
	$post_url = get_permalink( $entry->post_id );

	// Replace with your actual hidden field ID
	$hidden_field_id = 123;

	// Update the entry with the post URL
	FrmEntryMeta::update_entry_meta( $entry_id, $hidden_field_id, null, $post_url );
}