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Your problem might have something to do with mixing have_rows() and has_sub_field(), you should use have_rows() according to the docs https://www.advancedcustomfields.com/resources/has_sub_field/
<?php // APPROX. STRUCTURE if( have_rows('innhold') ): while ( have_rows('innhold') ) : the_row(); if(get_row_layout() == "flexible_content"): // ANOTHER FLEXIBLE CONTENT FIELD INSIDE if (have_rows('kolonneinnhold')): while(have_rows("kolonneinnhold")): the_row(); $text = get_sub_field('text'); $image = get_sub_field('image'); $textarea = get_sub_field('textarea'); // TRUE / FALSE FIELD $truefalse = get_sub_field('truefalse'); var_dump($truefalse); endwhile; endif; endif; endwhile; endif; ?>
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ACF wouldn’t be so widely used in WordPress if it didn’t have some pretty amazing capabilities. In this article, we look at a few of the features we’ll discuss during “7 things you didn’t know you could do with ACF” at #WPEDecode later this month. https://t.co/5lnsTxp81j pic.twitter.com/Yf0ThPG1QG— Advanced Custom Fields (@wp_acf) March 16, 2023
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