WordPress/wp-includes/version.php

<?php
/**
 * WordPress Version
 *
 * Contains version information for the current WordPress release.
 *
 * @package WordPress
 * @since 1.2.0
 */

/**
 * The WordPress version string.
 *
 * Holds the current version number for WordPress core. Used to bust caches
 * and to enable development mode for scripts when running from the /src directory.
 *
 * @global string $wp_version
 */
$wp_version = '5.9-alpha-52081';

/**
 * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
 *
 * @global int $wp_db_version
 */
$wp_db_version = 51917;

/**
 * Holds the TinyMCE version.
 *
 * @global string $tinymce_version
 */
$tinymce_version = '49110-20201110';

/**
 * Holds the required PHP version.
 *
 * @global string $required_php_version
 */
$required_php_version = '5.6.20';

/**
 * Holds the required MySQL version.
 *
 * @global string $required_mysql_version
 */
$required_mysql_version = '5.0';