Ticket #48689: 48689.diff

src/wp-admin/includes/class-wp-filesystem-ftpext.php

@@ -227 +227 @@
          * @return string|false The current working directory on success, false on failure.
          */
         public function cwd() {
+                if ( is_null( $this->link ) ) {
+                        return false;
+                }
                 $cwd = ftp_pwd( $this->link );
 
                 if ( $cwd ) {
@@ -417 +420 @@
          * @return bool Whether $file exists or not.
          */
         public function exists( $file ) {
+                if ( is_null( $this->link ) ) {
+                        return false;
+                }
                 $list = ftp_nlist( $this->link, $file );
 
                 if ( empty( $list ) && $this->is_dir( $file ) ) {
@@ -447 +453 @@
          * @return bool Whether $path is a directory.
          */
         public function is_dir( $path ) {
+                if ( is_null( $this->link ) ) {
+                        return false;
+                }
                 $cwd    = $this->cwd();
                 $result = @ftp_chdir( $this->link, trailingslashit( $path ) );
 
@@ -714 +723 @@
                         $limit_file = false;
                 }
 
+                if ( is_null( $this->link ) ){
+                        return false;
+                }
+
                 $pwd = ftp_pwd( $this->link );
 
                 if ( ! @ftp_chdir( $this->link, $path ) ) { // Can't change to folder = folder doesn't exist.