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1 <?php |
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2 /** |
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3 * Twenty Sixteen back compat functionality |
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4 * |
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5 * Prevents Twenty Sixteen from running on WordPress versions prior to 4.4, |
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6 * since this theme is not meant to be backward compatible beyond that and |
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7 * relies on many newer functions and markup changes introduced in 4.4. |
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8 * |
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9 * @package WordPress |
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10 * @subpackage Twenty_Sixteen |
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11 * @since Twenty Sixteen 1.0 |
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12 */ |
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13 |
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14 /** |
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15 * Prevent switching to Twenty Sixteen on old versions of WordPress. |
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16 * |
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17 * Switches to the default theme. |
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18 * |
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19 * @since Twenty Sixteen 1.0 |
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20 */ |
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21 function twentysixteen_switch_theme() { |
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22 switch_theme( WP_DEFAULT_THEME, WP_DEFAULT_THEME ); |
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23 |
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24 unset( $_GET['activated'] ); |
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25 |
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26 add_action( 'admin_notices', 'twentysixteen_upgrade_notice' ); |
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27 } |
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28 add_action( 'after_switch_theme', 'twentysixteen_switch_theme' ); |
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29 |
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30 /** |
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31 * Adds a message for unsuccessful theme switch. |
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32 * |
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33 * Prints an update nag after an unsuccessful attempt to switch to |
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34 * Twenty Sixteen on WordPress versions prior to 4.4. |
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35 * |
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36 * @since Twenty Sixteen 1.0 |
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37 * |
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38 * @global string $wp_version WordPress version. |
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39 */ |
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40 function twentysixteen_upgrade_notice() { |
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41 $message = sprintf( __( 'Twenty Sixteen requires at least WordPress version 4.4. You are running version %s. Please upgrade and try again.', 'twentysixteen' ), $GLOBALS['wp_version'] ); |
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42 printf( '<div class="error"><p>%s</p></div>', $message ); |
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43 } |
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44 |
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45 /** |
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46 * Prevents the Customizer from being loaded on WordPress versions prior to 4.4. |
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47 * |
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48 * @since Twenty Sixteen 1.0 |
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49 * |
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50 * @global string $wp_version WordPress version. |
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51 */ |
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52 function twentysixteen_customize() { |
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53 wp_die( sprintf( __( 'Twenty Sixteen requires at least WordPress version 4.4. You are running version %s. Please upgrade and try again.', 'twentysixteen' ), $GLOBALS['wp_version'] ), '', array( |
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54 'back_link' => true, |
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55 ) ); |
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56 } |
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57 add_action( 'load-customize.php', 'twentysixteen_customize' ); |
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58 |
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59 /** |
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60 * Prevents the Theme Preview from being loaded on WordPress versions prior to 4.4. |
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61 * |
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62 * @since Twenty Sixteen 1.0 |
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63 * |
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64 * @global string $wp_version WordPress version. |
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65 */ |
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66 function twentysixteen_preview() { |
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67 if ( isset( $_GET['preview'] ) ) { |
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68 wp_die( sprintf( __( 'Twenty Sixteen requires at least WordPress version 4.4. You are running version %s. Please upgrade and try again.', 'twentysixteen' ), $GLOBALS['wp_version'] ) ); |
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69 } |
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70 } |
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71 add_action( 'template_redirect', 'twentysixteen_preview' ); |