How to count the total number of rows in a ACF repeater output

Question

Question: How do you simply count the rows in the output of an ACF repeater field?

Goal: to make the output look different with a css class when there's only one row, vs. more than one row.

My code:

if( have_rows('testimonials')) {
    $counter = 0;
    $numtestimonials = '';

    //loop thru the rows
    while ( have_rows('testimonials') ){
        the_row();
        $counter++;
            if ($counter < 2) {                         
                $numtestimonials = 'onlyone';               
            }
        echo '<div class="testimonial ' . $numtestimonials . '">';
           // bunch of output here
        echo '</div>';                          
    }
}

Obviously, The way I do it here will not work as the count is < 2 the first time thru the row, so it returns true even if more rows are counted after.

Thank you!

Answer 1

OK, I finally found the answer to this.

The way to count total rows in an ACF repeater is:

$numrows = count( get_sub_field( 'field_name' ) );

Answer 2

It's work for me, count must be placed before if(have_rows('repeater_field') :

Ternary operator to avoid warning errors if repeater is empty

If you place the count after "if(have_rows('repeater_field')) :", count returns FALSE

$repeater_field = get_sub_field('repeater_field');
// OR if repeater isn't a sub_field
// $repeater_field = get_field('repeater_field');

// ternary operator to avoid warning errors if no result
$count =  $repeater_field ? count($repeater_field) : FALSE;

if(have_rows('repeater_field')) : // OR if($count) :

    echo 'Number of posts:' . $count . '<br>';

    while(have_rows('repeater_field')) : the_row();
        echo get_sub_field('field_name') . '<br>';
    endwhile;
endif;