<?php
/**
 * Upgrade WordPress Page.
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * We are upgrading WordPress.
 *
 * @since 1.5.1
 * @var bool
 */
define( 'WP_INSTALLING', true );

/** Load WordPress Bootstrap */
require dirname( __DIR__ ) . '/wp-load.php';

nocache_headers();

require_once ABSPATH . 'wp-admin/includes/upgrade.php';

delete_site_transient( 'update_core' );

if ( isset( $_GET['step'] ) ) {
	$step = $_GET['step'];
} else {
	$step = 0;
}

// Do it. No output.
if ( 'upgrade_db' === $step ) {
	wp_upgrade();
	die( '0' );
}

/**
 * @global string $wp_version             The WordPress version string.
 * @global string $required_php_version   The required PHP version string.
 * @global string $required_mysql_version The required MySQL version string.
 * @global wpdb   $wpdb                   WordPress database abstraction object.
 */
global $wp_version, $required_php_version, $required_mysql_version, $wpdb;

$step = (int) $step;

$php_version   = PHP_VERSION;
$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' ) );
?>
<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
	<meta name="viewport" content="width=device-width" />
	<meta http-equiv="Content-Type" content="<?php bloginfo( 'html_type' ); ?>; charset=<?php echo get_option( 'blog_charset' ); ?>" />
	<meta name="robots" content="noindex,nofollow" />
	<title><?php _e( 'WordPress &rsaquo; Update' ); ?></title>
	<?php wp_admin_css( 'install', true ); ?>
</head>
<body class="wp-core-ui">
<p id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>"><?php _e( 'WordPress' ); ?></a></p>

<?php if ( (int) get_option( 'db_version' ) === $wp_db_version || ! is_blog_installed() ) : ?>

<?php
elseif ( ! $php_compat || ! $mysql_compat ) :
	$version_url = sprintf(
		/* translators: %s: WordPress version. */
		esc_url( __( 'https://wordpress.org/documentation/wordpress-version/version-%s/' ) ),
		sanitize_title( $wp_version )
	);

$php_update_message = '</p><p>' . sprintf(
		/* translators: %s: URL to Update PHP page. */
		__( '<a href="%s">Learn more about updating PHP</a>.' ),
		esc_url( wp_get_update_php_url() )
	);

$annotation = wp_get_update_php_annotation();

if ( $annotation ) {
		$php_update_message .= '</p><p><em>' . $annotation . '</em>';
	}

if ( ! $mysql_compat && ! $php_compat ) {
		$message = sprintf(
			/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Minimum required MySQL version number, 5: Current PHP version number, 6: Current MySQL version number. */
			__( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher and MySQL version %4$s or higher. You are running PHP version %5$s and MySQL version %6$s.' ),
			$version_url,
			$wp_version,
			$required_php_version,
			$required_mysql_version,
			$php_version,
			$mysql_version
		) . $php_update_message;
	} elseif ( ! $php_compat ) {
		$message = sprintf(
			/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Current PHP version number. */
			__( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher. You are running version %4$s.' ),
			$version_url,
			$wp_version,
			$required_php_version,
			$php_version
		) . $php_update_message;
	} elseif ( ! $mysql_compat ) {
		$message = sprintf(
			/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required MySQL version number, 4: Current MySQL version number. */
			__( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires MySQL version %3$s or higher. You are running version %4$s.' ),
			$version_url,
			$wp_version,
			$required_mysql_version,
			$mysql_version
		);
	}

echo '<p>' . $message . '</p>';
	?>
	<?php
else :
	switch ( $step ) :
		case 0:
			$goback = wp_get_referer();
			if ( $goback ) {
				$goback = sanitize_url( $goback );
				$goback = urlencode( $goback );
			}
			?>
	<h1><?php _e( 'Database Update Required' ); ?></h1>
<p><?php _e( 'WordPress has been updated! Next and final step is to update your database to the newest version.' ); ?></p>
<p><?php _e( 'The database update process may take a little while, so please be patient.' ); ?></p>
<p class="step"><a class="button button-large button-primary" href="upgrade.php?step=1&amp;backto=<?php echo $goback; ?>"><?php _e( 'Update WordPress Database' ); ?></a></p>
			<?php
			break;
		case 1:
			wp_upgrade();

$backto = ! empty( $_GET['backto'] ) ? wp_unslash( urldecode( $_GET['backto'] ) ) : __get_option( 'home' ) . '/';
			$backto = esc_url( $backto );
			$backto = wp_validate_redirect( $backto, __get_option( 'home' ) . '/' );
			?>
	<h1><?php _e( 'Update Complete' ); ?></h1>
	<p><?php _e( 'Your WordPress database has been successfully updated!' ); ?></p>
	<p class="step"><a class="button button-large" href="<?php echo $backto; ?>"><?php _e( 'Continue' ); ?></a></p>
			<?php
			break;
endswitch;
endif;
?>
</body>
</html>

Source


<?php
/**
 * Upgrade WordPress Page.
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * We are upgrading WordPress.
 *
 * @since 1.5.1
 * @var bool
 */
define( 'WP_INSTALLING', true );

/** Load WordPress Bootstrap */
require dirname( __DIR__ ) . '/wp-load.php';

nocache_headers();

require_once ABSPATH . 'wp-admin/includes/upgrade.php';

delete_site_transient( 'update_core' );

if ( isset( $_GET['step'] ) ) {
    $step = $_GET['step'];
} else {
    $step = 0;
}

// Do it. No output.
if ( 'upgrade_db' === $step ) {
    wp_upgrade();
    die( '0' );
}

/**
 * @global string $wp_version             The WordPress version string.
 * @global string $required_php_version   The required PHP version string.
 * @global string $required_mysql_version The required MySQL version string.
 * @global wpdb   $wpdb                   WordPress database abstraction object.
 */
global $wp_version, $required_php_version, $required_mysql_version, $wpdb;

$step = (int) $step;

$php_version   = PHP_VERSION;
$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' ) );
?>
<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
    <meta name="viewport" content="width=device-width" />
    <meta http-equiv="Content-Type" content="<?php bloginfo( 'html_type' ); ?>; charset=<?php echo get_option( 'blog_charset' ); ?>" />
    <meta name="robots" content="noindex,nofollow" />
    <title><?php _e( 'WordPress &rsaquo; Update' ); ?></title>
    <?php wp_admin_css( 'install', true ); ?>
</head>
<body class="wp-core-ui">
<p id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>"><?php _e( 'WordPress' ); ?></a></p>

<?php if ( (int) get_option( 'db_version' ) === $wp_db_version || ! is_blog_installed() ) : ?>

<h1><?php _e( 'No Update Required' ); ?></h1>
<p><?php _e( 'Your WordPress database is already up to date!' ); ?></p>
<p class="step"><a class="button button-large" href="<?php echo esc_url( get_option( 'home' ) ); ?>/"><?php _e( 'Continue' ); ?></a></p>

    <?php
elseif ( ! $php_compat || ! $mysql_compat ) :
    $version_url = sprintf(
        /* translators: %s: WordPress version. */
        esc_url( __( 'https://wordpress.org/documentation/wordpress-version/version-%s/' ) ),
        sanitize_title( $wp_version )
    );

    $php_update_message = '</p><p>' . sprintf(
        /* translators: %s: URL to Update PHP page. */
        __( '<a href="%s">Learn more about updating PHP</a>.' ),
        esc_url( wp_get_update_php_url() )
    );

    $annotation = wp_get_update_php_annotation();

    if ( $annotation ) {
        $php_update_message .= '</p><p><em>' . $annotation . '</em>';
    }

    if ( ! $mysql_compat && ! $php_compat ) {
        $message = sprintf(
            /* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Minimum required MySQL version number, 5: Current PHP version number, 6: Current MySQL version number. */
            __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher and MySQL version %4$s or higher. You are running PHP version %5$s and MySQL version %6$s.' ),
            $version_url,
            $wp_version,
            $required_php_version,
            $required_mysql_version,
            $php_version,
            $mysql_version
        ) . $php_update_message;
    } elseif ( ! $php_compat ) {
        $message = sprintf(
            /* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Current PHP version number. */
            __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher. You are running version %4$s.' ),
            $version_url,
            $wp_version,
            $required_php_version,
            $php_version
        ) . $php_update_message;
    } elseif ( ! $mysql_compat ) {
        $message = sprintf(
            /* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required MySQL version number, 4: Current MySQL version number. */
            __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires MySQL version %3$s or higher. You are running version %4$s.' ),
            $version_url,
            $wp_version,
            $required_mysql_version,
            $mysql_version
        );
    }

    echo '<p>' . $message . '</p>';
    ?>
    <?php
else :
    switch ( $step ) :
        case 0:
            $goback = wp_get_referer();
            if ( $goback ) {
                $goback = sanitize_url( $goback );
                $goback = urlencode( $goback );
            }
            ?>
    <h1><?php _e( 'Database Update Required' ); ?></h1>
<p><?php _e( 'WordPress has been updated! Next and final step is to update your database to the newest version.' ); ?></p>
<p><?php _e( 'The database update process may take a little while, so please be patient.' ); ?></p>
<p class="step"><a class="button button-large button-primary" href="upgrade.php?step=1&amp;backto=<?php echo $goback; ?>"><?php _e( 'Update WordPress Database' ); ?></a></p>
            <?php
            break;
        case 1:
            wp_upgrade();

            $backto = ! empty( $_GET['backto'] ) ? wp_unslash( urldecode( $_GET['backto'] ) ) : __get_option( 'home' ) . '/';
            $backto = esc_url( $backto );
            $backto = wp_validate_redirect( $backto, __get_option( 'home' ) . '/' );
            ?>
    <h1><?php _e( 'Update Complete' ); ?></h1>
    <p><?php _e( 'Your WordPress database has been successfully updated!' ); ?></p>
    <p class="step"><a class="button button-large" href="<?php echo $backto; ?>"><?php _e( 'Continue' ); ?></a></p>
            <?php
            break;
endswitch;
endif;
?>
</body>
</html>

<?php /** * Upgrade WordPress Page. * * @package WordPress * @subpackage Administration */ /** * We are upgrading WordPress. * * @since 1.5.1 * @var bool */ define( 'WP_INSTALLING', true ); /** Load WordPress Bootstrap */ require dirname( __DIR__ ) . '/wp-load.php'; nocache_headers(); require_once ABSPATH . 'wp-admin/includes/upgrade.php'; delete_site_transient( 'update_core' ); if ( isset( $_GET['step'] ) ) { $step = $_GET['step']; } else { $step = 0; } // Do it. No output. if ( 'upgrade_db' === $step ) { wp_upgrade(); die( '0' ); } /** * @global string $wp_version The WordPress version string. * @global string $required_php_version The required PHP version string. * @global string $required_mysql_version The required MySQL version string. * @global wpdb $wpdb WordPress database abstraction object. */ global $wp_version, $required_php_version, $required_mysql_version, $wpdb; $step = (int) $step; $php_version = PHP_VERSION; $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' ) ); ?> <!DOCTYPE html> <html <?php language_attributes(); ?>> <head> <meta name="viewport" content="width=device-width" /> <meta http-equiv="Content-Type" content="<?php bloginfo( 'html_type' ); ?>; charset=<?php echo get_option( 'blog_charset' ); ?>" /> <meta name="robots" content="noindex,nofollow" /> <title><?php _e( 'WordPress &rsaquo; Update' ); ?></title> <?php wp_admin_css( 'install', true ); ?> </head> <body class="wp-core-ui"> <p id="logo"><a href="<?php echo esc_url( __( 'https://wordpress.org/' ) ); ?>"><?php _e( 'WordPress' ); ?></a></p> <?php if ( (int) get_option( 'db_version' ) === $wp_db_version || ! is_blog_installed() ) : ?> <h1><?php _e( 'No Update Required' ); ?></h1> <p><?php _e( 'Your WordPress database is already up to date!' ); ?></p> <p class="step"><a class="button button-large" href="<?php echo esc_url( get_option( 'home' ) ); ?>/"><?php _e( 'Continue' ); ?></a></p> <?php elseif ( ! $php_compat || ! $mysql_compat ) : $version_url = sprintf( /* translators: %s: WordPress version. */ esc_url( __( 'https://wordpress.org/documentation/wordpress-version/version-%s/' ) ), sanitize_title( $wp_version ) ); $php_update_message = '</p><p>' . sprintf( /* translators: %s: URL to Update PHP page. */ __( '<a href="%s">Learn more about updating PHP</a>.' ), esc_url( wp_get_update_php_url() ) ); $annotation = wp_get_update_php_annotation(); if ( $annotation ) { $php_update_message .= '</p><p><em>' . $annotation . '</em>'; } if ( ! $mysql_compat && ! $php_compat ) { $message = sprintf( /* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Minimum required MySQL version number, 5: Current PHP version number, 6: Current MySQL version number. */ __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher and MySQL version %4$s or higher. You are running PHP version %5$s and MySQL version %6$s.' ), $version_url, $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version ) . $php_update_message; } elseif ( ! $php_compat ) { $message = sprintf( /* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Current PHP version number. */ __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher. You are running version %4$s.' ), $version_url, $wp_version, $required_php_version, $php_version ) . $php_update_message; } elseif ( ! $mysql_compat ) { $message = sprintf( /* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required MySQL version number, 4: Current MySQL version number. */ __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires MySQL version %3$s or higher. You are running version %4$s.' ), $version_url, $wp_version, $required_mysql_version, $mysql_version ); } echo '<p>' . $message . '</p>'; ?> <?php else : switch ( $step ) : case 0: $goback = wp_get_referer(); if ( $goback ) { $goback = sanitize_url( $goback ); $goback = urlencode( $goback ); } ?> <h1><?php _e( 'Database Update Required' ); ?></h1> <p><?php _e( 'WordPress has been updated! Next and final step is to update your database to the newest version.' ); ?></p> <p><?php _e( 'The database update process may take a little while, so please be patient.' ); ?></p> <p class="step"><a class="button button-large button-primary" href="upgrade.php?step=1&backto=<?php echo $goback; ?>"><?php _e( 'Update WordPress Database' ); ?></a></p> <?php break; case 1: wp_upgrade(); $backto = ! empty( $_GET['backto'] ) ? wp_unslash( urldecode( $_GET['backto'] ) ) : __get_option( 'home' ) . '/'; $backto = esc_url( $backto ); $backto = wp_validate_redirect( $backto, __get_option( 'home' ) . '/' ); ?> <h1><?php _e( 'Update Complete' ); ?></h1> <p><?php _e( 'Your WordPress database has been successfully updated!' ); ?></p> <p class="step"><a class="button button-large" href="<?php echo $backto; ?>"><?php _e( 'Continue' ); ?></a></p> <?php break; endswitch; endif; ?> </body> </html>