diff --git a/src/wp-admin/edit.php b/src/wp-admin/edit.php
index 98ce887af4..e05d3ce195 100644
--- a/src/wp-admin/edit.php
+++ b/src/wp-admin/edit.php
@@ -80,6 +80,8 @@ if ( $doaction ) {
 		$sendback = admin_url( $post_new_file );
 	}
 
+	$post_ids = array();
+
 	if ( 'delete_all' === $doaction ) {
 		// Prepare for deletion of all posts with a specified post status (i.e. Empty Trash).
 		$post_status = preg_replace( '/[^a-z0-9_-]+/i', '', $_REQUEST['post_status'] );
@@ -96,7 +98,7 @@ if ( $doaction ) {
 		$post_ids = array_map( 'intval', $_REQUEST['post'] );
 	}
 
-	if ( ! isset( $post_ids ) ) {
+	if ( empty( $post_ids ) ) {
 		wp_redirect( $sendback );
 		exit;
 	}
diff --git a/src/wp-admin/upload.php b/src/wp-admin/upload.php
index d29914114a..8ea6e1c6d6 100644
--- a/src/wp-admin/upload.php
+++ b/src/wp-admin/upload.php
@@ -119,6 +119,7 @@ $doaction = $wp_list_table->current_action();
 
 if ( $doaction ) {
 	check_admin_referer( 'bulk-media' );
+
 	$post_ids = array();
 
 	if ( 'delete_all' === $doaction ) {