the foreach in the loop returns bool(false) though array is present

[littleangel 0]

in my code below the **data is extracted correctly for the first foreach but doesn't return anything for 2nd foreach though selected one present inside the 2nd foreach** i still get the error Warning: Invalid argument supplied for foreach() for line `foreach ($authorlist as $post)`... however the 2nd foreach returns data correctly as soon as i remove the first foreach loop. 

 

below is my code

 

  

  <?php

    

    $all= get_posts(array('post_type' => 'books', 'numberposts' => -1,));

    

    foreach ( $all as $post ) :  setup_postdata($post);

    

        if (!empty($post))

        {

         $booklink = array();

    

         $booklist = get_field('booklist'); 

                   foreach ($booklist as $post) : setup_postdata($post);

                        if (!empty($post))

                            {

                            $booklink[] = strip_tags(get_field('booklink',$post));                                       

                            }

                    endforeach;

                    wp_reset_postdata();

         echo $booklink[0];  

    

         $authorname = array();

    

         $authorlist = get_field('authorlist'); 

                   foreach ($authorlist as $post) : setup_postdata($post);

                        if (!empty($post))

                            {

                            $authorname[] = strip_tags(get_field('authorname',$post));                                       

                            }

                    endforeach;

                    wp_reset_postdata();

    echo $authorname[0]; 

    

        }

    endforeach;

    ?>

 

i did var_dump($authorlist) ...it returns bool(false) as long as foreach ($booklist as $post)  loop is present. The moment i remove that loop then the dump shows the data of the authorlist correctly...how to get both the loops working together.

 

u can see the output here http://myproject.byethost7.com/wp/?page_id=6

Edited August 31, 2014 by littleangel

[jcbones 52]

Not enough info.  Post the array you are working with.  There are a couple of custom functions in the code as well, we have no idea what those contain.  It could all lead back to your error.

[CroNiX 58]

Because you foreach as $post in all of them. $post gets overwritten in the inner-loops. Name them different in each loop.