Sort categories by checkbox

<form method="post" action="" id="formen">

 	<?php
 	$categories=get_categories('child_of=4&hide_empty=0');
 	foreach($categories as $category) {
 		echo '<div class="formo">';
 		echo "<input type='checkbox' name='place_id[]' value='$category->term_id' />";
 		echo '<span>'.$category->cat_name.'</span>';
 		echo '</div>';
 	}//end foreach

 	$place_id=$_POST['place_id'];
 	while (list ($key,$val) = @each ($place_id)) {
 		$v = "$val,";

 	}//end while
 	?>
 	<br />
 	<input type="submit" value="<?php echo(__('Sort','rab')); ?>" id="formbottom">
 </form>
 <?php
 if(empty($v)) {
 	query_posts('cat=4&posts_per_page=10');
 }else{
 	query_posts(array('category__and'=>array($v),'posts_per_page'=>2,'orderby'=>title,'order'=>DESC));
 }//end if
  ?>

What I’ve came up with. Problem is that it doesn’t work for multiple choices.

Try it with this: https://pastebin.com/jTyNHPt8

Works great! Cheers.

Hi , I have one problem though. The query doesn’t stick if you navigate with previous entries/pagination.

Try it with this query [untested]:

<?php
 $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;

 if(empty($cat_array)) {
        query_posts('cat=4&posts_per_page=10&paged='.$paged);
 }else{
        query_posts(array('category__and'=> $cat_array,'posts_per_page'=>2,'orderby'=> 'title', 'order'=> 'DESC','paged' => $paged));
 }//end if
?>

Hi , thanks for the reply, does not work unfortunately. I think the main problem is that when the page refreshes it forgets the checkbox option and therefore loses the query.

I think I’ve come to an solution to this problem and that is to save the user input (checkbox values) into a session. However I can’t get it to work.

Cheers!

I.E (sorry for spam , couldn’t edit my reply)

<?php $_SESSION['cat_array'] = $_POST["place_id"]; ?>

I seem to have solved it by using (ignore the prints)
however WordPress seems to be excluding my session statements

<?php
$cat_array = (isset($_POST['place_id'])) ? $_POST['place_id'] : array();

$kategorival = (isset($_SESSION['checked'])) ? $_SESSION['checked'] : array();  

    echo '<pre>';

    print_r($_POST['place_id']);
    echo '</pre>';
?>

<form method="post" action="" id="formen">

<?php
        $categories=get_categories('child_of=4&hide_empty=0');
        $checked = array();
        foreach($categories as $category) {

                echo '<div class="formo">';
                echo "<input type='checkbox' name='place_id[$category->term_id]' value='$category->term_id' ";
                echo (in_array($category->term_id, $cat_array)) ? 'checked="checked"' : '';
                echo "/>";
                echo '<span>'.$category->cat_name.'</span>';
                echo '</div>';

                if (in_array($category->term_id, $cat_array)) {
                	 $checked[$category->term_id] = $category->term_id;
                }

        }//end foreach
        $_SESSION['checked'] = $checked ;
        echo '<pre>';
//
        print_r($_SESSION['checked']);
        echo '</pre>';

?>
        <br />
           <p id="submitarn">
      <input type="submit" value="<?php echo(__('Sort','rab')); ?>" id="formbottom">
     <a id="resetarn" href="2-14"><input type="button" value="Reset"></a>
      </p>
 </form>

 <?php
 $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;

 if(empty($cat_array)) {
        query_posts('cat=4&posts_per_page=10&paged='.$paged);
 }else{
        query_posts(array('category__and'=> $kategorival,'posts_per_page'=>10,'orderby'=> 'title', 'order'=> 'DESC','paged' => $paged));
 }//end if
?>

I solved it by using sessions for all pages except the first query page.

[74 lines of code moderated as per the Forum Rules. The maximum number of lines of code that you can post in these forums is ten lines. Please use the pastebin]

https://pastebin.com/3e0n9iSy There we go