Ticket #40347: 40347.diff

src/wp-includes/rest-api/class-wp-rest-request.php

@@ -286 +286 @@
          * @param string $key Header name.
          */
         public function remove_header( $key ) {
+                $key = $this->canonicalize_header_name( $key );
                 unset( $this->headers[ $key ] );
         }
 

tests/phpunit/tests/rest-api/rest-request.php

@@ -30 +30 @@
                 $this->assertNull( $this->request->get_header( 'missing' ) );
                 $this->assertNull( $this->request->get_header_as_array( 'missing' ) );
         }
+        
+        public function test_remove_header() {
+                $this->request->add_header( 'Test-Header', 'value' );
+                $this->assertEquals( 'value', $this->request->get_header( 'Test-Header' ) );
+                
+                $this->request->remove_header( 'Test-Header' );
+                $this->assertNull( $this->request->get_header( 'Test-Header' ) );
+        }
 
         public function test_header_multiple() {
                 $value1 = 'application/x-wp-example-1';