if ($_GET[\'api\'] == \'json\' && isset($_GET[\'id\'])) {

        $post = get_post($_GET[\'id\']);   // $post contains the post object   

        header("content-type: application/json");
        echo json_encode($post);
}
die();

这段代码可以工作，但是如果我想扩展它，那么在第二种情况下（下面），如果我写?second=case&id=204 到我获取的urlUnexpected但如果我写信?first=case&id=204 我收到了请求

if (isset($_GET[\'api\'])) {
    if ($_GET[\'first\'] == \'case\' && isset($_GET[\'id\'])) {
         // $query is the WP_Query Object
        $post = get_post($_GET[\'id\']);   // $post contains the post object   

        header("content-type: application/json");
        echo json_encode($post);
    }
    if ($_GET[\'second\'] == \'case\' && isset($_GET[\'id\'])) {
         // $query is the WP_Query Object
        $post = get_post($_GET[\'id\']);   // $post contains the post object   

        header("content-type: application/json");
        echo json_encode($post);
    }
    die();
}

if (isset($_GET[\'api\'])) {
    if (isset($_GET[\'first\']) && $_GET[\'first\'] == \'case\' && isset($_GET[\'id\'])) {
         // $query is the WP_Query Object
        $post = get_post($_GET[\'id\']);   // $post contains the post object   

        header("content-type: application/json");
        echo json_encode($post);
    }
    else if (isset($_GET[\'second\']) && $_GET[\'second\'] == \'case\' && isset($_GET[\'id\'])) {
        // $query is the WP_Query Object
        $post = get_post($_GET[\'id\']);   // $post contains the post object   

        header("content-type: application/json");
        echo json_encode($post);
    }
    die();
}