ACF-使用关系字段来选择页面

Question

I am currently trying to use the ACF relationship field to select which pages I would like a certain piece of code to run on, for example, if I select Page A, Page B and Page C, I would like the work "hello" to be added.

So far, I have the below Relationship field.

        <?php
$posts = get_field('which_venue', options);

if( $posts ): ?>
    <ul>
    <?php foreach( $posts as $post): // variable must be called $post (IMPORTANT) ?>
        <?php setup_postdata($post); ?>
        <li>
            <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
          <?php
          $thisurl = the_permalink(); 
          // echo $thisurl;             

            $url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
            if($url == $thisurl) {
    echo "match";
}
?>
        </li>
    <?php endforeach; ?>
    </ul>
    <?php wp_reset_postdata(); // IMPORTANT - reset the $post object so the rest of the page works correctly ?>
<?php endif; ?> 

My idea was to try and matchthe URL with the url selected, meaning if my URL was http://www.example.com/pagea and I had selected Page A, it would display hello, but unfortunately no luck so far.

Does anyone have an idea of another way around this?

Thanks!

Answer 1

From your question, it looks like this would do the trick:

1. Change your relationship field to save Post IDs instead of Post Object.
2. Once changed, go to your options page, and re-save your field data.

3. Place this code in your page.php file, or wherever you want your code to run:

    <?php //Check if this page is selected in which_venue //Get the selected fields $selectedPages = get_field('which_venue', options); //Get the current page's ID $myID = get_the_ID(); //Check if the current page's ID exists inside the selected fields array. if(in_array($myID, $selectedPages)){ //Run your code echo 'This Page was selected in "which_venue".'; }else{ //Run other code echo 'This Page was NOT selected in "which_venue".'; } ?>