<?php

[0] Fix | Delete

/**

[1] Fix | Delete

* Back compat functionality

[2] Fix | Delete

*

[3] Fix | Delete

* Prevents the theme from running on WordPress versions prior to 5.3,

[4] Fix | Delete

* since this theme is not meant to be backward compatible beyond that and

[5] Fix | Delete

* relies on many newer functions and markup changes introduced in 5.3.

[6] Fix | Delete

*

[7] Fix | Delete

* @package WordPress

[8] Fix | Delete

* @subpackage Twenty_Twenty_One

[9] Fix | Delete

* @since Twenty Twenty-One 1.0

[10] Fix | Delete

*/

[11] Fix | Delete

[12] Fix | Delete

/**

[13] Fix | Delete

* Display upgrade notice on theme switch.

[14] Fix | Delete

*

[15] Fix | Delete

* @since Twenty Twenty-One 1.0

[16] Fix | Delete

*

[17] Fix | Delete

* @return void

[18] Fix | Delete

*/

[19] Fix | Delete

function twenty_twenty_one_switch_theme() {

[20] Fix | Delete

add_action( 'admin_notices', 'twenty_twenty_one_upgrade_notice' );

[21] Fix | Delete

}

[22] Fix | Delete

add_action( 'after_switch_theme', 'twenty_twenty_one_switch_theme' );

[23] Fix | Delete

[24] Fix | Delete

/**

[25] Fix | Delete

* Adds a message for unsuccessful theme switch.

[26] Fix | Delete

*

[27] Fix | Delete

* Prints an update nag after an unsuccessful attempt to switch to

[28] Fix | Delete

* the theme on WordPress versions prior to 5.3.

[29] Fix | Delete

*

[30] Fix | Delete

* @since Twenty Twenty-One 1.0

[31] Fix | Delete

*

[32] Fix | Delete

* @global string $wp_version WordPress version.

[33] Fix | Delete

*

[34] Fix | Delete

* @return void

[35] Fix | Delete

*/

[36] Fix | Delete

function twenty_twenty_one_upgrade_notice() {

[37] Fix | Delete

echo '<div class="error"><p>';

[38] Fix | Delete

printf(

[39] Fix | Delete

/* translators: %s: WordPress Version. */

[40] Fix | Delete

esc_html__( 'This theme requires WordPress 5.3 or newer. You are running version %s. Please upgrade.', 'twentytwentyone' ),

[41] Fix | Delete

esc_html( $GLOBALS['wp_version'] )

[42] Fix | Delete

);

[43] Fix | Delete

echo '</p></div>';

[44] Fix | Delete

}

[45] Fix | Delete

[46] Fix | Delete

/**

[47] Fix | Delete

* Prevents the Customizer from being loaded on WordPress versions prior to 5.3.

[48] Fix | Delete

*

[49] Fix | Delete

* @since Twenty Twenty-One 1.0

[50] Fix | Delete

*

[51] Fix | Delete

* @global string $wp_version WordPress version.

[52] Fix | Delete

*

[53] Fix | Delete

* @return void

[54] Fix | Delete

*/

[55] Fix | Delete

function twenty_twenty_one_customize() {

[56] Fix | Delete

wp_die(

[57] Fix | Delete

sprintf(

[58] Fix | Delete

/* translators: %s: WordPress Version. */

[59] Fix | Delete

esc_html__( 'This theme requires WordPress 5.3 or newer. You are running version %s. Please upgrade.', 'twentytwentyone' ),

[60] Fix | Delete

esc_html( $GLOBALS['wp_version'] )

[61] Fix | Delete

),

[62] Fix | Delete

'',

[63] Fix | Delete

array(

[64] Fix | Delete

'back_link' => true,

[65] Fix | Delete

)

[66] Fix | Delete

);

[67] Fix | Delete

}

[68] Fix | Delete

add_action( 'load-customize.php', 'twenty_twenty_one_customize' );

[69] Fix | Delete

[70] Fix | Delete

/**

[71] Fix | Delete

* Prevents the Theme Preview from being loaded on WordPress versions prior to 5.3.

[72] Fix | Delete

*

[73] Fix | Delete

* @since Twenty Twenty-One 1.0

[74] Fix | Delete

*

[75] Fix | Delete

* @global string $wp_version WordPress version.

[76] Fix | Delete

*

[77] Fix | Delete

* @return void

[78] Fix | Delete

*/

[79] Fix | Delete

function twenty_twenty_one_preview() {

[80] Fix | Delete

if ( isset( $_GET['preview'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification

[81] Fix | Delete

wp_die(

[82] Fix | Delete

sprintf(

[83] Fix | Delete

/* translators: %s: WordPress Version. */

[84] Fix | Delete

esc_html__( 'This theme requires WordPress 5.3 or newer. You are running version %s. Please upgrade.', 'twentytwentyone' ),

[85] Fix | Delete

esc_html( $GLOBALS['wp_version'] )

[86] Fix | Delete

)

[87] Fix | Delete

);

[88] Fix | Delete

}

[89] Fix | Delete

}

[90] Fix | Delete

add_action( 'template_redirect', 'twenty_twenty_one_preview' );

[91] Fix | Delete

[92] Fix | Delete