编辑文件：polyfills.php
<?php /** * Polyfills for functions missing on the plugin's supported-but-older WordPress and PHP versions. * * Must stay in the global namespace so the backfilled functions are reachable by the same * unqualified names their callers use. Required from wp-mail-smtp.php before the plugin boots. * * @since 4.9.0 */ if ( ! defined( 'ABSPATH' ) ) { exit; // Exit if accessed directly. } if ( ! function_exists( 'wp_is_serving_rest_request' ) ) { /** * Backfill of WP 6.5's wp_is_serving_rest_request() for older WordPress. * * Action Scheduler 4.0+ calls this function unconditionally. * * @since 4.9.0 * * @return bool */ function wp_is_serving_rest_request() { return defined( 'REST_REQUEST' ) && REST_REQUEST; } }
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