Bug Description

Prepared SQL queries with INSERT INTO ... VALUES ... filled with the correct number of placeholders using the syntax commonly used for queries with IN(...) clauses (implode() + array_fill()) emit a warning.

Minimal Code Snippet

The issue happens when running this command:

phpcs --standard=WordPress -s testfile.php

... over a file containing this code:

$all_relationships = array(
	array( 1, 1 ),
	array( 1, 2 ),
	array( 1, 3 ),
);
$wpdb->query(
	$wpdb->prepare(
		sprintf(
			"INSERT INTO {$wpdb->term_relationships} (object_id, term_taxonomy_id) VALUES %s",
			implode( ',', array_fill( 0, count( $all_relationships ), '(%d,%d)' ) )
		),
		array_merge( ...$all_relationships )
	)
);

Error Code

Incorrect number of replacements passed to $wpdb->prepare().
Found 1 replacement parameters, expected 0.
(WordPress.DB.PreparedSQLPlaceholders.ReplacementsWrongNumber)

Environment

Additional Context (optional)

Tested Against develop Branch?

• I have verified the issue still exists in the develop branch of WordPressCS.