Ticket #46187: 46187-2.diff

wp-includes/class-wp-block.php

@@ -241 +241 @@
                  * @param string $block_content The block content about to be appended.
                  * @param array  $block         The full block, including name and attributes.
                  */
-                return apply_filters( 'render_block', $block_content, $this->parsed_block );
+                $block_content = apply_filters( 'render_block', $block_content, $this->parsed_block );
+
+                /**
+                 * Filters the content of a single block.
+                 *
+                 * The dynamic portion of the hook name, `$name`, refers to
+                 * the block name - "namespace/block".
+                 *
+                 * @since x.y.z
+                 *
+                 * @param string $block_content The block content about to be appended.
+                 * @param array  $block         The full block, including name and attributes.
+                 */
+                return apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block );
         }
 
 }