WP_Theme_JSON::sanitize( array $input )

Source

File: wp-includes/class-wp-theme-json.php

private static function sanitize( $input ) {
		$output = array();

		if ( ! is_array( $input ) ) {
			return $output;
		}

		$allowed_top_level_keys = self::ALLOWED_TOP_LEVEL_KEYS;
		$allowed_settings       = self::ALLOWED_SETTINGS;
		$allowed_styles         = self::ALLOWED_STYLES;
		$allowed_blocks         = array_keys( self::get_blocks_metadata() );
		$allowed_elements       = array_keys( self::ELEMENTS );

		$output = array_intersect_key( $input, array_flip( $allowed_top_level_keys ) );

		// Build the schema.
		$schema                 = array();
		$schema_styles_elements = array();
		foreach ( $allowed_elements as $element ) {
			$schema_styles_elements[ $element ] = $allowed_styles;
		}
		$schema_styles_blocks   = array();
		$schema_settings_blocks = array();
		foreach ( $allowed_blocks as $block ) {
			$schema_settings_blocks[ $block ]           = $allowed_settings;
			$schema_styles_blocks[ $block ]             = $allowed_styles;
			$schema_styles_blocks[ $block ]['elements'] = $schema_styles_elements;
		}
		$schema['styles']             = $allowed_styles;
		$schema['styles']['blocks']   = $schema_styles_blocks;
		$schema['styles']['elements'] = $schema_styles_elements;
		$schema['settings']           = $allowed_settings;
		$schema['settings']['blocks'] = $schema_settings_blocks;

		// Remove anything that's not present in the schema.
		foreach ( array( 'styles', 'settings' ) as $subtree ) {
			if ( ! isset( $input[ $subtree ] ) ) {
				continue;
			}

			if ( ! is_array( $input[ $subtree ] ) ) {
				unset( $output[ $subtree ] );
				continue;
			}

			$result = self::remove_keys_not_in_schema( $input[ $subtree ], $schema[ $subtree ] );

			if ( empty( $result ) ) {
				unset( $output[ $subtree ] );
			} else {
				$output[ $subtree ] = $result;
			}
		}

		return $output;
	}