diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index f98a3f8b5f..94e99d1ae6 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -4445,3 +4445,23 @@ function mbstring_binary_safe_encoding( $reset = false ) {
 function reset_mbstring_encoding() {
 	mbstring_binary_safe_encoding( true );
 }
+
+/**
+ * Alternative to filter_var( $var, FILTER_VALIDATE_BOOLEAN )
+ *
+ * @since 4.0.0
+ *
+ * @param mixed $var
+ * @return boolean
+ */
+function wp_validate_boolean( $var ) {
+	if ( is_bool( $var ) ) {
+		return $var;
+	}
+
+	if ( 'false' === $var ) {
+		return false;
+	}
+
+	return (bool) $var;
+}
\ No newline at end of file
diff --git a/wp-includes/media.php b/wp-includes/media.php
index 135ee95caa..364817712f 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -1272,10 +1272,10 @@ function wp_playlist_shortcode( $attr ) {
 	$data = array(
 		'type' => $atts['type'],
 		// don't pass strings to JSON, will be truthy in JS
-		'tracklist' => filter_var( $atts['tracklist'], FILTER_VALIDATE_BOOLEAN ),
-		'tracknumbers' => filter_var( $atts['tracknumbers'], FILTER_VALIDATE_BOOLEAN ),
-		'images' => filter_var( $atts['images'], FILTER_VALIDATE_BOOLEAN ),
-		'artists' => filter_var( $atts['artists'], FILTER_VALIDATE_BOOLEAN ),
+		'tracklist' => wp_validate_boolean( $atts['tracklist'] ),
+		'tracknumbers' => wp_validate_boolean( $atts['tracknumbers'] ),
+		'images' => wp_validate_boolean( $atts['images'] ),
+		'artists' => wp_validate_boolean( $atts['artists'] ),
 	);
 
 	$tracks = array();