I’m thinking this may be more of a problem with my PHP rather than my use of the settings API, but I can’t seem to get WordPress to save an array of data for a multi-select box.
The multi-select box corresponds to a custom meta field, and the select options are the custom post types that will display that meta field.
Here is the display code:
case 'select2':
echo "<select id='$id' style='width:15em;height:10em;' class='select$field_class' name='" . $buddha_option_name . "[$id]' multiple>";
foreach($choices as $item) {
$item = explode("|",$item);
$item[0] = esc_html($item[0], 'buddha_textdomain');
$selected = ($options[$id]==$item[1]) ? 'selected="selected"' : '';
echo "<option value='$item[1]' $selected>$item[0]</option>";
}
echo "</select>";
echo ($desc != '') ? "<br /><span class='description'>$desc</span>" : "";
break;
$choices
is defined here as ‘choices’:
$options[] = array(
"section" => "custom_meta",
"id" => BUDDHA_SHORTNAME . "_meta_email",
"title" => __( 'Email Meta Box', 'buddha_textdomain' ),
"desc" => __( 'Select post types to have custom email meta box.', 'buddha_textdomain' ),
"type" => "select2",
"std" => print_r($buddha_option_name[$id]),
"choices" => array( __('Posts','buddha_textdomain') . "|post", __('Pages','buddha_textdomain') . "|page", __('Faculty/Staff','buddha_textdomain') . "|staff", __('FAQ','buddha_textdomain') . "|faq", __('Documents','buddha_textdomain') . "|docs", __('Courses','buddha_textdomain') . "|courses" )
);
And the validation code:
case 'select2':
// process $select_values
$select_values = array();
foreach ($option['choices'] as $k => $v) {
// explode the connective
$pieces = explode("|", $v);
$select_values[] = $pieces[1];
}
// check to see if selected value is in our approved array of values!
$valid_input[$option['id']] = (in_array( $input[$option['id']], $select_values) ? $input[$option['id']] : '' );
break;
Currently, if I select more than one value from the multi-select field, WP will only save one value (usually the first alphabetical value). I need it to save more than one value in the array.
I thought adding []
to the end of [$id]
might help, but no.
So, it looks like two things are going on here:
As noted by @Radek, you could have made the name of the select box an array by using
[]
– e.g.name="my_option_name[]"
– this will result in the filed$_POST['my_option_name']
being an array of selected options that you can then store.A closer look at your code has me stumped:
You’re only ever saving one value to
$valid_input[$option['id']]
– is yourswitch
statement in a loop itself? If so, try changing the last line to this:Note the
[]
before the assignment operator. When you save$valid_input
, it should treat the value of$valid_input[$option['id']]
as an array.