Block Bindings: Support Image block caption attribute

ockham · ockham · commit 4d94de25d884 · 2025-09-15T14:00:50.000+02:00
diff --git a/lib/compat/wordpress-6.9/block-bindings.php b/lib/compat/wordpress-6.9/block-bindings.php
@@ -7,6 +7,19 @@
  * @subpackage Block Bindings
  */
 
+// The following filter can be removed once the minimum required WordPress version is 6.9 or newer.
+add_filter(
+	'block_bindings_supported_attributes_core/image',
+	function ( $attributes ) {
+		if ( ! in_array( 'caption', $attributes, true ) ) {
+			$attributes[] = 'caption';
+		}
+		return $attributes;
+	},
+	10,
+	3
+);
+
 /**
  * Callback function for the render_block filter.
  *
