Forminator - datepicker: disable date ranges via ACF repeater (options page field)

forminator-datepicker-disable-ranges-acf-repater-options.php

<?php 

/**
* Plugin Name: Forminator - datepicker: disable date ranges via ACF repeater (options page field) 
* Plugin URI: https://premium.wpmudev.org/
* Description: Forminator - datepicker: disable date ranges via ACF repeater (options page field) 
* Note: ACF date fields in repeater (options page) must have "return date format" set the same as Forminator datepicker date format
* Make sure to adjust ACF fields names too
*
* Author: adczk
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*
* config in comment
* use as MU plugin
*/


add_filter( 'forminator_field_date_markup', 'wpmu_forminator_datepicker_acf_ranges', 11, 2);
function wpmu_forminator_datepicker_acf_ranges( $html, $field ) { 

	$allowed_fields = array( 'date-1' ); // define datepicker fields ID this should be applied to
	
	#######################
	
	if ( !in_array( $field['element_id'], $allowed_fields ) ) {
		return $html;
	}
	
	$date_ranges = array();
	
	if( have_rows('date_ranges', 'option') ) { // adjust repeater field name here and in line below
		while ( have_rows('date_ranges', 'option') ) { 
			the_row();
			// adjust date start/end subfields names below
			$date_ranges[] = get_sub_field('start_date') . ' - ' . get_sub_field('end_date');			
		}
		
		$disabled_ranges = implode( ',', $date_ranges );
		
		$html = str_replace( 'data-disable-range=""', 'data-disable-range="' .$disabled_ranges. '"', $html );
		
		
	}
	
	return $html;
    
}