我用不同的<select> 和<input>.

我使用meta_query 并构建一个键/值对数组。

Array
(
    [relation] => AND
    [0] => Array
        (
            [relation] => AND
            [0] => Array
                (
                    [fields] => ID
                    [key] => ville
                    [value] => Angers
                    [compare] => LIKE
                    [type] => CHAR
                )

        )

    [1] => Array
        (
            [relation] => OR
        )

    [2] => Array
        (
            [relation] => OR
        )

)

它可以工作，我可以过滤用户或帖子（我使用WP_User_Query 或WP_Query).

搜索表单使用AJAX，这意味着每次用户更改select, 这个$query_array 更新，结果列表也会更新。

因此，假设select的默认值为0

<option selected="" value="0"> -- City -- </option>

在这种情况下，我重置了meta\\u键/meta\\u值：

if (!empty($_POST[\'city\']) && $_POST[\'city\'] != \'0\') {

        $meta_value_ville = $_POST[\'city\'];
        array_push($query_array_and, array(\'fields\' => \'ID\', \'key\' => \'ville\', \'value\' => $meta_value_ville, \'compare\' => \'LIKE\', \'type\' => \'CHAR\'));
    } else if ($_POST[\'city\'] === \'0\') {
        // reset
        array_push($query_array_and, array(\'fields\' => \'ID\', \'key\' => \'\', \'value\' => \'\', \'compare\' => \'LIKE\', \'type\' => \'CHAR\'));
    }

我清空键和值。

结果是

Array
(
    [relation] => AND
    [0] => Array
        (
            [relation] => AND
            [0] => Array
                (
                    [fields] => ID
                    [key] => 
                    [value] => 
                    [compare] => LIKE
                    [type] => CHAR
                )

        )

    [1] => Array
        (
            [relation] => OR
        )

    [2] => Array
        (
            [relation] => OR
        )

)

这是最好的方法吗？我觉得有些时候，使用这种方法，帖子或用户的列表并不完整。

$meta_query_args = array( \'relation\' => \'AND\' ); // assuming you want \'AND\' search, you\'re using both in your example

if ( ! empty( $_POST[\'city\'] ) && $_POST[\'city\'] != \'0\' ) {

    $meta_value_ville = $_POST[\'city\'];

    $meta_query_args[\'city_clause\'] = array(
        \'key\'     => \'ville\',
        \'value\'   => $meta_value_ville,
        \'compare\' => \'LIKE\',
        \'type\'    => \'CHAR\'
    );
}

// Example, say you also have a country field
if ( ! empty( $_POST[\'country\'] ) && $_POST[\'country\'] != \'0\' ) {

    $meta_value = $_POST[\'country\'];

    $meta_query_args[\'country_clause\'] = array(
        \'key\'     => \'country\',
        \'value\'   => $meta_value,
        \'compare\' => \'LIKE\',
        \'type\'    => \'CHAR\'
    );
}

$q = new WP_Query( array(
    \'meta_query\' => $meta_query_args,
    \'orderby\'    => \'city_clause\'
) );