staylor / WordPress

			global $wpdb;

			$php_compat = version_compare( phpversion(), $item->php_version, '>=' );

			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )

				$mysql_compat = true;

			else

				$mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );

			if ( ! $php_compat || ! $mysql_compat )

				return false;

	$old_wp_version = $wp_version; // The version of WordPress we're updating from

	$development_build = ( false !== strpos( $old_wp_version . $wp_version, '-' )  ); // a dash in the version indicates a Development release

	$php_compat     = version_compare( $php_version, $required_php_version, '>=' );

	if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )

		$mysql_compat = true;

	else

		$mysql_compat = version_compare( $mysql_version, $required_mysql_version, '>=' );

	if ( !$mysql_compat || !$php_compat )

		$wp_filesystem->delete($from, true);

			$form_action = 'update-core.php?action=do-core-reinstall';

		} else {

			$php_compat     = version_compare( $php_version, $update->php_version, '>=' );

			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )

				$mysql_compat = true;

			else

				$mysql_compat = version_compare( $mysql_version, $update->mysql_version, '>=' );

			if ( !$mysql_compat && !$php_compat )

				$message = sprintf( __('You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.'), $update->current, $update->php_version, $update->mysql_version, $php_version, $mysql_version );

$php_version    = phpversion();

$mysql_version  = $wpdb->db_version();

$php_compat     = version_compare( $php_version, $required_php_version, '>=' );

if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )

	$mysql_compat = true;

else

	$mysql_compat = version_compare( $mysql_version, $required_mysql_version, '>=' );

@header( 'Content-Type: ' . get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ) );

?>