mapmaker1

This error occurred again for me on a WordPress update. This time the error was logged in woocommerce plugin, but this is probably because of timing when the page is loaded. As devksec has said, it seems to be related to the Spectra block editor, and occurs on my pages where I have used the Spectra tab block. I resolved the issue in the same way as devksec, but I don’t know the root cause which is likely to do with the plugin.

I had to edit function wp_render_layout_support_flag( $block_content, $block ) in public_html/wp-includes/block-supports/layout.php at line 570. The error was $parentLayout being passed as a string instead of an array causing a fatal error. In my modified code the cases where $layout and $parentLayout are not arrays is covered. My modified version is:

$layout_0       = $block['attrs']['style']['layout'] ?? array();
$parentLayout_0 = $block['parentLayout'] ?? array();

$layout = is_array( $layout_0 ) ? $layout_0 : array();
if ( ! is_array( $layout_0 ) ) {
	error_log( 'Expected $layout to be an array, got: ' . gettype( $layout_0 ) );
}
$parent_layout = is_array( $parentLayout_0 ) ? $parentLayout_0 : array();
if ( ! is_array( $parentLayout_0 ) ) {
	error_log( 'Expected $parentLayout to be an array, got: ' . gettype( $parentLayout_0 ) );
}

$container_content_class = wp_unique_id_from_values(
	array(
		'layout'       => array_intersect_key(
			$layout,
			array_flip( array( 'selfStretch', 'flexSize', 'columnStart', 'columnSpan', 'rowStart', 'rowSpan' ) )
		),
		'parentLayout' => array_intersect_key(
			$parent_layout,
			array_flip( array( 'minimumColumnWidth', 'columnCount' ) )
		),
	),
	'wp-container-content-'
);

The original version was:

$container_content_class = wp_unique_id_from_values(
    array(
        'layout'       => array_intersect_key(
            $block['attrs']['style']['layout'] ?? array(),
            array_flip(
                array( 'selfStretch', 'flexSize', 'columnStart', 'columnSpan', 'rowStart', 'rowSpan' )
            )
        ),
        'parentLayout' => array_intersect_key(
            $block['parentLayout'] ?? array(),
            array_flip(
                array( 'minimumColumnWidth', 'columnCount' )
            )
        ),
    ),
    'wp-container-content-'
);