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Viewing / Editing File: back-compat.php

<?php
/**
 * Theme back compatibility functionality
 *
 * Prevents Sinatra from running on WordPress versions prior to 4.7,
 * since this theme is not meant to be backward compatible beyond that and
 * relies on many newer functions and markup changes introduced in 4.7.
 *
 * @package Sinatra
 * @author  Sinatra Team <hello@sinatrawp.com>
 * @since   1.0.0
 */

/**
 * Do not allow direct script access.
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Prevent switching to Highend X on old versions of WordPress.
 *
 * Switches to the default theme.
 *
 * @since 1.0.0
 */
function sinatra_switch_theme() {
	switch_theme( WP_DEFAULT_THEME );
	unset( $_GET['activated'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
	add_action( 'admin_notices', 'sinatra_upgrade_notice' );
}
add_action( 'after_switch_theme', 'sinatra_switch_theme' );

/**
 * Adds a message for unsuccessful theme switch.
 *
 * Prints an update nag after an unsuccessful attempt to switch to
 * Sinatra on WordPress versions prior to 4.7.
 *
 * @since 1.0.0
 * @global string $wp_version WordPress version.
 */
function sinatra_upgrade_notice() {
	/* translators: %s WordPress version */
	$message = sprintf( esc_html__( 'Sinatra theme requires at least WordPress version 4.7. You are running version %s. Please upgrade and try again.', 'sinatra' ), $GLOBALS['wp_version'] );
	printf( '<div class="error"><p>%s</p></div>', esc_html( $message ) );
}

/**
 * Prevents the Customizer from being loaded on WordPress versions prior to 4.7.
 *
 * @since 1.0.0
 * @global string $wp_version WordPress version.
 */
function sinatra_customize_prevent() {

/* translators: %s WordPress version */
	$message = sprintf( esc_html__( 'Sinatra theme requires at least WordPress version 4.7. You are running version %s. Please upgrade your WordPress and try again.', 'sinatra' ), $GLOBALS['wp_version'] );

wp_die( esc_html( $message ), '', array( 'back_link' => true ) );
}
add_action( 'load-customize.php', 'sinatra_customize_prevent' );

/**
 * Prevents the Theme Preview from being loaded on WordPress versions prior to 4.7.
 *
 * @since 1.0.0
 * @global string $wp_version WordPress version.
 */
function sinatra_preview_prevent() {
	if ( isset( $_GET['preview'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		/* translators: %s WordPress version */
		$message = sprintf( esc_html__( 'Sinatra theme requires at least WordPress version 4.7. You are running version %s. Please upgrade and try again.', 'sinatra' ), $GLOBALS['wp_version'] );
		wp_die( esc_html( $message ) );
	}
}
add_action( 'template_redirect', 'sinatra_preview_prevent' );

if ( ! function_exists( 'wp_body_open' ) ) {
	/**
	 * Backward compatibility for wp_body_open hook.
	 *
	 * @since 1.0.0
	 */
	function wp_body_open() { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedFunctionFound
		do_action( 'wp_body_open' ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound
	}
}

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