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<?php
/**
* Prevent switching to Writee on old versions of WordPress.
*
* Switches to the default theme.
*
*/
function writee_switch_theme() {
switch_theme( WP_DEFAULT_THEME );
unset( $_GET['activated'] );
add_action( 'admin_notices', 'writee_upgrade_notice' );
}
add_action( 'after_switch_theme', 'writee_switch_theme' );
/**
* Adds a message for unsuccessful theme switch.
*
* Prints an update nag after an unsuccessful attempt to switch to
* Writee on WordPress versions prior to 4.5.
*
* @global string $wp_version WordPress version.
*/
function writee_upgrade_notice() {
$message = sprintf( __( 'Writee requires at least WordPress version 4.5. You are running version %s. Please upgrade and try again.', 'writee' ), $GLOBALS['wp_version'] );
printf( '<div class="error"><p>%s</p></div>', $message );
}
/**
* Prevents the Customizer from being loaded on WordPress versions prior to 4.5.
* @global string $wp_version WordPress version.
*/
function writee_customize() {
wp_die( sprintf( __( 'Writee requires at least WordPress version 4.5. You are running version %s. Please upgrade and try again.', 'writee' ), $GLOBALS['wp_version'] ), '', array(
'back_link' => true,
) );
}
add_action( 'load-customize.php', 'writee_customize' );
/**
* Prevents the Theme Preview from being loaded on WordPress versions prior to 4.5.
* @global string $wp_version WordPress version.
*/
function writee_preview() {
if ( isset( $_GET['preview'] ) ) {
wp_die( sprintf( __( 'Writee requires at least WordPress version 4.5. You are running version %s. Please upgrade and try again.', 'writee' ), $GLOBALS['wp_version'] ) );
}
}
add_action( 'template_redirect', 'writee_preview' );
?>