Make Selected Mutiselect Items "selected"

Question

Make Selected Mutiselect Items "selected"

user8220

2022年1月13日 16:59

I'm developing a theme settings panel for a new wordpress theme that have an option to exclude categories from being shown in the loop. I managed to get the main functionality to work, using a mutilselect box and saving the values as array ...

?php $cats = get_categories('hide_empty=0orderby=name'); ?
select name="?php echo $option['id']; ?[]" id="?php echo $option['id']; ?" multiple="multiple"  
    option value="0"None (don't exclude anything)/option
    ?php foreach ($cats as $cat_list ) { ?
        option value="?php echo $cat_list-cat_ID; ?" ?php selected( $selected, $cat_list-cat_ID ); ??php echo $cat_list-cat_name; ?/option 
    ?php } ?
/select

however I can't understand how check every item in foreach() loop if its value matches one value in the stored values array, then apply selected="selected" if it returns true to it. I understand selected() wp function but don't understand how to make use of it in this case ( multiple values inside foreach() loop ).

Any help will be appreciated, I'm a n00b so forgive me if it's a stupid question :)

Topic select array php Wordpress

Category Web

Akhtarujjaman Shuvo · Accepted Answer · 2022年1月13日 16:59

Let's make it simpler:

<?php 
foreach ($cats as $cat_list ) { ?>
    <option value="<?php echo $cat_list->cat_ID; ?>" <?php selected( in_array($cat_list->cat_ID, $selected ) ); ?>><?php echo $cat_list->cat_name; ?></option> 
<?php } 
?>

Here, $selected variable contains an array of values for the currently selected items.

Paolo · Accepted Answer · 2017年2月2日 08:09

I know this is an old question but still the answer was not answered using the core function...

Here it is:

$cats = get_categories('hide_empty=0&orderby=name'); ?>
<select name="<?php echo $option['id']; ?>[]" id="<?php echo $option['id']; ?>" multiple="multiple">
<option value="0">None (don't exclude anything)</option>
<?php foreach ( $cats as $cat_list ) { ?>
    <option value="<?php echo $cat_list->cat_ID; ?>" <?php selected( true, in_array($cat_list->cat_ID, $selected ) ); ?>><?php echo $cat_list->cat_name; ?></option>
<?php } ?>
</select>

Make sure $selected is an array of course that contains selected category ids.

chrisguitarguy · Accepted Answer · 2014年2月11日 06:05

I'm assuming your $selected variable contains an array of values for the currently selected items?

You can't use selected in this case (with multi select boxes) because it only compares two strings. It won't test to see if the value is in an array. Instead, use a ternary statement and in_array()

<?php 
foreach ($cats as $cat_list ) { 
$selected = in_array( $cat_list->cat_ID, $selected ) ? ' selected="selected" ' : '';    
?>
    <option value="<?php echo $cat_list->cat_ID; ?>" <?php echo $selected; ?>><?php echo $cat_list->cat_name; ?></option> 
<?php } ?>

kaiser · Accepted Answer · 2011年8月29日 00:22

The Q is not stupid. Imo just the extremly confusing way it's documented. I also remember that there's somewhere in the codex written, that using selected() and similar stuff is a must(!). I don't aggree.

Anyway: selected( 'one_value', 'val_to_compare_with', true );

Make Selected Mutiselect Items "selected"

About