Ticket #29500: 29500.1.diff

tests/phpunit/tests/export/functions.export.php

@@ -41 +41 @@
                 throw new Exception( 'baba' );
         }
 }
+
+
+
+class Test_Export_Filter extends WP_UnitTestCase { 
+  
+    public function setUp() { 
+        require_once( ABSPATH . '/wp-admin/includes/export.php' ); 
+    } 
+ 
+        /** 
+         * Always return test.xml 
+     * @return string 
+     */ 
+        public function filename_filter( $filename ) { 
+                return 'test.xml'; 
+        } 
+        
+        /** 
+         * Test that get_export_filename() will return the filtered filname. 
+         */ 
+        public function test_get_export_filename_returns_filtered_string() { 
+                add_filter( 'export_filename', array( $this, 'filename_filter' ) ); 
+                $this->assertEquals( get_export_filename(), 'test.xml' ); 
+        remove_filter( 'export_filename', array( $this, 'filename_filter' ) ); 
+    } 
+} 
+ No newline at end of file

src/wp-admin/includes/export.php

@@ -40 +40 @@
         do_action( 'export_wp', $args );
 
         $sitename = sanitize_key( get_bloginfo( 'name' ) );
-        if ( ! empty($sitename) ) $sitename .= '.';
+        if ( ! empty( $sitename ) ) $sitename .= '.';
         $filename = $sitename . 'wordpress.' . date( 'Y-m-d' ) . '.xml';
+        /**
+         * Filter the export filename.
+         *
+         * @since 4.1.0
+         *
+         * @param string $filename The name of the file to export data.
+         */
+        $filename = apply_filters( 'export_filename', $filename );
 
         header( 'Content-Description: File Transfer' );
         header( 'Content-Disposition: attachment; filename=' . $filename );