CODEWITHSUNDEEP
phpinputdrop-down-menu
j8d
j8d

Reputation: 510

Assign Multiselect Drop-down Options to a String Variable in PHP

I use the following code to get a list of country codes from a user and assign it to a string called 'locations.'

<input
    type="text" 
    class="widefat code" 
    id="edit-menu-item-visibility-<?php echo $item_id; ?>" 
    name="menu-item-visibility[<?php echo $item_id; ?>]" 
    value="<?php echo esc_html( get_post_meta( $item_id, 'locations', true ) ); ?>" />
    <?php echo 'Enter 2-digit country codes separated by commas, e.g. US,CA,SG' ?></br>

If I wanted to use the following multi-select dropdown menu instead, how could I pass the values to 'locations' as a comma separated list (string)? i.e. "US,CA,SG"

<select name="chzn-select" class="chzn-select" multiple="true">
    <option value="KH">Cambodia</option>
    <option value="CM">Cameroon</option>
    <option value="CA">Canada</option>
    <option value="SG">Singapore</option>
    <option value="US">United States</option>
</select>

EDIT:

Here is how the variable currently gets to the database:

function update_option_text( $menu_id, $menu_item_db_id, $args ) {
    $meta_value = get_post_meta( $menu_item_db_id, 'locations', true );
    $new_meta_value = stripcslashes( $_POST['menu-item-visibility'][$menu_item_db_id] );

    if( '' == $new_meta_value ) {
        delete_post_meta( $menu_item_db_id, 'locations', $meta_value );
    }
    elseif( $meta_value !== $new_meta_value ) {
        update_post_meta( $menu_item_db_id, 'locations', $new_meta_value );
    }
}

UPDATE:

The selected values are now getting sent to the database. But I can seem to figure out how to keep the selected values selected after saving the form.

Here's my non-working attempt to make it work by brute force:

<option value="AF" <?php $locations = get_post_meta( $item_id, 'locations', true); if(in_array("AF", $locations ))){echo "selected='selected'";}else{echo "";} ?> >Afghanistan</option>

Am I on the right track?

Upvotes: 0

Views: 1420

Answers (1)

Mr. Engineer
Mr. Engineer

Reputation: 3515

Just treat your select box as an array like :

<select name="chzn-select[]" class="chzn-select" multiple="true">

And your PHP code : 

<?php
if(!empty($_POST["chzn-select"])) {
  $val = implode(",",$_POST["chzn-select"]);
}
?>

Upvotes: 3

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