Skip array intermediary for innerHTML

Author: dmsnell

src/wp-includes/media.php

@@ -5312,7 +5312,7 @@ function get_post_galleries( $post, $html = true, $max_galleries = PHP_INT_MAX )
 		$gallery_ids      = $processor->allocate_and_return_parsed_attributes()['ids'] ?? array();
 		$ids              = array();
 		$sources          = array();
-		$inner_html       = array();
+		$inner_html       = '';
 
 		while ( $processor->next_token() && $processor->get_depth() > $gallery_depth ) {
 			if ( ! $processor->is_html() ) {
@@ -5321,7 +5321,7 @@ function get_post_galleries( $post, $html = true, $max_galleries = PHP_INT_MAX )
 			}
 
 			if ( $processor->get_depth() === $gallery_depth + 1 ) {
-				$inner_html[] = $processor->get_html_content();
+				$inner_html .= $processor->get_html_content();
 			}
 		}
 
@@ -5377,7 +5377,7 @@ function get_post_galleries( $post, $html = true, $max_galleries = PHP_INT_MAX )
 
 		// Old Gallery block format as HTML.
 		if ( $html ) {
-			$galleries[] = implode( '', $inner_html );
+			$galleries[] = $inner_html;
 			continue;
 		}
 
@@ -5408,7 +5408,6 @@ function get_post_galleries( $post, $html = true, $max_galleries = PHP_INT_MAX )
 		}
 
 		// Otherwise, extract srcs from the innerHTML.
-		$inner_html = implode( '', $inner_html );
 		$src_finder = new WP_HTML_Tag_Processor( $inner_html );
 		while ( $src_finder->next_tag() ) {
 			$src = $src_finder->get_attribute( 'src' );