WP_Font_Utils::sanitize_from_schema( array $tree, array $schema ): array

Source

public static function sanitize_from_schema( $tree, $schema ) {
	if ( ! is_array( $tree ) || ! is_array( $schema ) ) {
		return array();
	}

	foreach ( $tree as $key => $value ) {
		// Remove keys not in the schema or with null/empty values.
		if ( ! array_key_exists( $key, $schema ) ) {
			unset( $tree[ $key ] );
			continue;
		}

		$is_value_array  = is_array( $value );
		$is_schema_array = is_array( $schema[ $key ] ) && ! is_callable( $schema[ $key ] );

		if ( $is_value_array && $is_schema_array ) {
			if ( wp_is_numeric_array( $value ) ) {
				// If indexed, process each item in the array.
				foreach ( $value as $item_key => $item_value ) {
					$tree[ $key ][ $item_key ] = isset( $schema[ $key ][0] ) && is_array( $schema[ $key ][0] )
						? self::sanitize_from_schema( $item_value, $schema[ $key ][0] )
						: self::apply_sanitizer( $item_value, $schema[ $key ][0] );
				}
			} else {
				// If it is an associative or indexed array, process as a single object.
				$tree[ $key ] = self::sanitize_from_schema( $value, $schema[ $key ] );
			}
		} elseif ( ! $is_value_array && $is_schema_array ) {
			// If the value is not an array but the schema is, remove the key.
			unset( $tree[ $key ] );
		} elseif ( ! $is_schema_array ) {
			// If the schema is not an array, apply the sanitizer to the value.
			$tree[ $key ] = self::apply_sanitizer( $value, $schema[ $key ] );
		}

		// Remove keys with null/empty values.
		if ( empty( $tree[ $key ] ) ) {
			unset( $tree[ $key ] );
		}
	}

	return $tree;
}

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