wp_redirect不起作用

我正在尝试张贴到页面上, 并在帖子中进行一些WordPress插入, 但是以某种方式重定向在此之后不起作用。我尝试了以下三种选择：

wp_redirect($ location);
wp_safe_redirect($ location);
header(‘ Location：http：//example.com’ );

【wp_redirect不起作用】这是我想做的：

发布到另一个页面。
查找要上传的文件并上传目录
上载文件。
使用set_post_thumbnail设置帖子缩略图
重定向到所需页面。

该脚本将一直工作到设置缩略图, 然后消失。如果有人想使用它从模板前端上传缩略图, 则可以使用它。

// if you have this in a file you will need to load "wp-load.php" to get access to WP functions. If you post to "self" with this code then WordPress is by default loaded require $_SERVER['DOCUMENT_ROOT'] . "/wp-load.php"; // require two files that are included in the wp-admin but not on the front end. These give you access to some special functions below. require $_SERVER['DOCUMENT_ROOT'] . "/wp-admin/includes/file.php"; require $_SERVER['DOCUMENT_ROOT'] . "/wp-admin/includes/image.php"; // required for wp_handle_upload() to upload the file $upload_overrides = array( 'test_form' => FALSE ); global $current_user; get_currentuserinfo(); $logged_in_user = $current_user-> ID; //get user POST information global $post; $loop = new WP_Query( array( 'posts_per_page' => 1, 'post_type' => "vet-profile", 'order' => "ASC", 'orderby' => "menu_order", 'author'=> "$logged_in_user" ) ); while ( $loop-> have_posts() ): $loop-> the_post(); $current_postID = $post-> ID; $current_posttitle = get_the_title(); endwhile; // count how many files were uploaded $upload_files = $_FILES[ 'upload_files' ]; // load up a variable with the upload direcotry $uploads = wp_upload_dir(); // foreach file uploaded do the upload //foreach ( range( 0, $count_files ) as $i ) //{ // create an array of the $_FILES for each file $file_array = array( 'name' => $_FILES['upload_files']['name'], 'type'=> $_FILES['upload_files']['type'], 'tmp_name'=> $_FILES['upload_files']['tmp_name'], 'error' => $_FILES['upload_files']['error'], 'size'=> $_FILES['upload_files']['size'], ); // check to see if the file name is not empty if ( !empty( $file_array['name'] ) ) { ?> < ?php // upload the file to the server $uploaded_file = wp_handle_upload( $upload_files, $upload_overrides ); if ( $uploaded_file ) { echo '< script> alert("Image successfully uploaded.\n"); < /script> '; } else { echo '< script> alert("Fish! some error occured. Please try again."); < /script> '; } // checks the file type and stores in in a variable $wp_filetype = wp_check_filetype( basename( $uploaded_file['file'] ), null ); // set up the array of arguments for "wp_insert_post(); " $attachment = array( 'post_mime_type' => $wp_filetype['type'], 'post_title' => preg_replace('/\.[^.]+$/', '', basename( $uploaded_file['file'] ) ), 'post_content' => '', 'post_author' => $logged_in_user, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_parent' => $current_postID, 'guid' => $uploads['url'] . '/' . $file_array['name'] ); // insert the attachment post type and get the ID $attachment_id = wp_insert_attachment( $attachment, $uploaded_file['file'], $current_postID ); // generate the attachment metadata $attach_data = http://www.srcmini.com/wp_generate_attachment_metadata( $attachment_id, $uploaded_file['file'] ); // update the attachment metadata wp_update_attachment_metadata( $attachment_id, $attach_data); // set thumbnail to the current post set_post_thumbnail( $current_postID, $attachment_id ); echo '< script> alert("set thumbnail")'; $location = empty($_POST['redirect_to']) ? get_redirect_link() : $_POST['redirect_to']; wp_safe_redirect( $location ); echo '< script> alert("End Loop"); < /script> '; }

提前致谢
#1我发现我唯一可以可靠地调用wp_redirect的地方是init动作挂钩(http://codex.wordpress.org/Plugin_API/Action_Reference/init)的回调函数, 因为它在文档中明确指出：

在WordPress完成加载之后但在发送任何标头之前运行。对于拦截$ _GET或$ _POST触发器很有用。

你可能需要调查一下。如果这对你不起作用, 你可能想尝试的另一件事是使用输出缓冲。这是有关如何执行此操作的简洁教程：
http://tommcfarlin.com/wp_redirect-headers-already-sent/
#2

echo '< script> alert("set thumbnail")'; $location = empty($_POST['redirect_to']) ? get_redirect_link() : $_POST['redirect_to']; wp_safe_redirect( $location ); echo '< script> alert("End Loop"); < /script> ';

上面的代码肯定会无法正常工作。向输出中写入内容后, 你将无法重定向。我没有检查其余的代码, 但是如果它如你所说的那样工作, 那么删除顶部和底部的行(甚至只是顶部的行)都应该可以完成所有工作：