CODEWITHSUNDEEP
phpdatabasewordpressadvanced-custom-fields
AJT
AJT

Reputation: 266

Programatically update an ACF field for all posts when an ACF options page is updated

I have a custom post type set up with some ACF fields. I also have an ACF options page set up.

I'm trying to update a text field on all custom posts with a value from a text field within the options page, when the options page is updated.

Here's what I've tried:

function update_global_flash_text(){
    $current_page = get_current_screen()->base;
    if($current_page == 'toplevel_page_options') {
            function update_global_servicing_text() {
                $args = array(
                 'post_type' => 'custom',
                 'nopaging' => true,
                );

                $the_query = new WP_Query( $args );

                if ( $the_query->have_posts() ) {
                     while ( $the_query->have_posts() ) {
                         $the_query->the_post();
                         update_field('servicing_flash_text', $_POST['global_servicing_offer_text']);
                     }
                }

                wp_reset_postdata();
            }

            if(array_key_exists('post',$_POST)){
               update_global_servicing_text();
            }
        }
}
add_action('admin_head','update_global_flash_text');

Ideally I also want to only update the posts field if the global field value has changed.

Upvotes: 4

Views: 3517

Answers (1)

Klaassiek
Klaassiek

Reputation: 2906

You are probably looking for the acf/save_post hook. This is triggered whenever your ACF options page is getting saved. Just make sure that the current screen has the id of your options page.

function my_function() {
    $screen = get_current_screen();
    /*  You can get the screen id when looking at the url or var_dump($screen) */
    if ($screen->id === "{YOUR_ID}") {
        $new_value = get_field('global_servicing_offer_text', 'options');
        $args = array(
            'post_type' => 'custom',
            'nopaging' => true,
        );
        
        $the_query = new WP_Query( $args );
        
        if ( $the_query->have_posts() ) {
            while ( $the_query->have_posts() ) {
                $the_query->the_post();
                update_field('servicing_flash_text', $new_value);
            }
        }
        
        wp_reset_postdata();
    }
}
add_action('acf/save_post', 'my_function');

Does that get you anywhere?

EDIT: Since you asked to only update data if the global value has changed, you should do the following:

1 Give your acf/save_post action a priority higher than 10:

add_action('acf/save_post', 'my_function', 5);

2 Get the old and new value:

$old_value = get_field('global_servicing_offer_text', 'options');
// Check the $_POST array to find the actual key
$new_value = $_POST['acf']['field_5fd213f4c6e02'];

3 Compare them if($old_value != $new_value)

Upvotes: 5

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