acf-dynamic-flexible-content-layouts-metabox.php

<?php
add_action('acf/field_group/admin_head', 'hwk_acf_flexible_layout_metabox');
function hwk_acf_flexible_layout_metabox(){
    global $field_group;
    
    $match = false;
    foreach($field_group['location'] as $location){
        foreach($location as $rule){
            if($rule['param'] == 'hwk_flexible_content_rule'){
                $match = true;
                break;
            }
        }
    }
    
    if(!$match)
        return;

	add_meta_box('acf-field-group-options-flexible-group', __('Options Flexible', 'acf'), function(){
		global $field_group;
        
		if(!acf_is_field_group_key( $field_group['key']))
			$field_group['key'] = uniqid('group_');
        
		$group = $field_group;
		
		acf_render_field_wrap(array(
            'label'			=> __('Titre','acf'),
            'type'			=> 'text',
            'name'			=> 'hwk_flexible_group_title',
            'prefix'		=> 'acf_field_group',
            'value'			=> (isset($group['hwk_flexible_group_title'])) ? $group['hwk_flexible_group_title'] : $field_group['title'],
        ));
        
        acf_render_field_wrap(array(
            'label'			=> __('Image','acf'),
            'type'			=> 'image',
            'name'			=> 'hwk_flexible_group_image',
            'prefix'		=> 'acf_field_group',
            'value'			=> (isset($group['hwk_flexible_group_image'])) ? $group['hwk_flexible_group_image'] : '',
            'preview_size' 	=> "thumbnail",
        ));
		
		?>
		<script type="text/javascript">
		if( typeof acf !== 'undefined' ) {
			acf.postbox.render({
				'id': 'acf-field-group-options-flexible-group',
				'label': 'left'
			});	
		}
		</script>
		<?php
		
	}, 'acf-field-group', 'normal', 'high');
}