wordPress 如何儲存外掛程式中上傳的圖片到對應外掛程式的目錄下面？

開發了個外掛程式中有個上傳圖片的功能，外掛程式下面有個目錄是img儲存圖片的，想問如何課一儲存上傳的啊圖片到這個目錄？

// Check that the nonce is valid, and the user can edit this post.if (    isset($_POST['my_image_upload_nonce'], $_POST['post_id'])    && wp_verify_nonce($_POST['my_image_upload_nonce'], 'my_image_upload')    && current_user_can('edit_post', $_POST['post_id'])) {    // The nonce was valid and the user has the capabilities, it is safe to continue.    // These files need to be included as dependencies when on the front end.    require_once(ABSPATH . 'wp-admin/includes/image.php');    require_once(ABSPATH . 'wp-admin/includes/file.php');    require_once(ABSPATH . 'wp-admin/includes/media.php');    // Let WordPress handle the upload.    // Remember, 'my_image_upload' is the name of our file input in our form above.    $url=WPWSL_PLUGIN_URL . '/img/' . $imageSize . '.png';//    update_option('upload_path',WP_CONTENT_DIR.'/uploads');    update_option('upload_path',WPWSL_PLUGIN_URL.'/img/');    $attachment_id = media_handle_upload('my_image_upload', $_POST['post_id']);    if (is_wp_error($attachment_id)) {        // There was an error uploading the image.        echo "
There was an error uploading your file.
";    } else {        // The image was uploaded successfully!        echo "
The image was uploaded successfully!
";        add_filter('img', $attachment_id);//        add_filter('img', 'custom_upload_directory');    }} else {    echo "
The security check failed, maybe show the user an error
";    // The security check failed, maybe show the user an error.}

1. 清單項目

回複內容：

開發了個外掛程式中有個上傳圖片的功能，外掛程式下面有個目錄是img儲存圖片的，想問如何課一儲存上傳的啊圖片到這個目錄？

// Check that the nonce is valid, and the user can edit this post.if (    isset($_POST['my_image_upload_nonce'], $_POST['post_id'])    && wp_verify_nonce($_POST['my_image_upload_nonce'], 'my_image_upload')    && current_user_can('edit_post', $_POST['post_id'])) {    // The nonce was valid and the user has the capabilities, it is safe to continue.    // These files need to be included as dependencies when on the front end.    require_once(ABSPATH . 'wp-admin/includes/image.php');    require_once(ABSPATH . 'wp-admin/includes/file.php');    require_once(ABSPATH . 'wp-admin/includes/media.php');    // Let WordPress handle the upload.    // Remember, 'my_image_upload' is the name of our file input in our form above.    $url=WPWSL_PLUGIN_URL . '/img/' . $imageSize . '.png';//    update_option('upload_path',WP_CONTENT_DIR.'/uploads');    update_option('upload_path',WPWSL_PLUGIN_URL.'/img/');    $attachment_id = media_handle_upload('my_image_upload', $_POST['post_id']);    if (is_wp_error($attachment_id)) {        // There was an error uploading the image.        echo "
There was an error uploading your file.
";    } else {        // The image was uploaded successfully!        echo "
The image was uploaded successfully!
";        add_filter('img', $attachment_id);//        add_filter('img', 'custom_upload_directory');    }} else {    echo "
The security check failed, maybe show the user an error
";    // The security check failed, maybe show the user an error.}

1. 清單項目

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