71 lines
1.8 KiB
PHP
71 lines
1.8 KiB
PHP
<?php
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/**
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* Back compat functionality.
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*
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* @package PressBook
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*/
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/**
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* Display upgrade notice on theme switch.
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*/
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function pressbook_switch_theme() {
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add_action( 'admin_notices', 'pressbook_upgrade_notice' );
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}
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add_action( 'after_switch_theme', 'pressbook_switch_theme' );
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/**
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* Adds a message for unsuccessful theme switch.
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*
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* Prints an update nag after an unsuccessful attempt to switch to
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* the theme on WordPress versions prior to 5.3.
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*
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* @global string $wp_version WordPress version.
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*/
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function pressbook_upgrade_notice() {
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echo '<div class="error"><p>';
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printf(
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/* translators: %s: WordPress Version. */
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esc_html__( 'This theme requires WordPress 5.3 or newer. You are running version %s. Please upgrade.', 'pressbook' ),
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esc_html( $GLOBALS['wp_version'] )
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);
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echo '</p></div>';
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}
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/**
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* Prevents the Customizer from being loaded on WordPress versions prior to 5.3.
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*
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* @global string $wp_version WordPress version.
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*/
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function pressbook_customize() {
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wp_die(
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sprintf(
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/* translators: %s: WordPress Version. */
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esc_html__( 'This theme requires WordPress 5.3 or newer. You are running version %s. Please upgrade.', 'pressbook' ),
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esc_html( $GLOBALS['wp_version'] )
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),
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'',
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array(
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'back_link' => true,
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)
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);
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}
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add_action( 'load-customize.php', 'pressbook_customize' );
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/**
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* Prevents the Theme Preview from being loaded on WordPress versions prior to 5.3.
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*
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* @global string $wp_version WordPress version.
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*/
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function pressbook_preview() {
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if ( isset( $_GET['preview'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification
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wp_die(
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sprintf(
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/* translators: %s: WordPress Version. */
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esc_html__( 'This theme requires WordPress 5.3 or newer. You are running version %s. Please upgrade.', 'pressbook' ),
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esc_html( $GLOBALS['wp_version'] )
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)
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);
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}
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}
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add_action( 'template_redirect', 'pressbook_preview' );
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