back-compat.php 2.1 KB

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  1. <?php
  2. /**
  3. * seedlet back compat functionality
  4. *
  5. * Prevents seedlet from running on WordPress versions prior to 4.7,
  6. * since this theme is not meant to be backward compatible beyond that and
  7. * relies on many newer functions and markup changes introduced in 4.7.
  8. *
  9. * @package Seedlet
  10. * @since seedlet 1.0.0
  11. */
  12. /**
  13. * Prevent switching to seedlet on old versions of WordPress.
  14. *
  15. * Switches to the default theme.
  16. *
  17. * @since seedlet 1.0.0
  18. */
  19. function seedlet_switch_theme() {
  20. switch_theme( WP_DEFAULT_THEME );
  21. unset( $_GET['activated'] );
  22. add_action( 'admin_notices', 'seedlet_upgrade_notice' );
  23. }
  24. add_action( 'after_switch_theme', 'seedlet_switch_theme' );
  25. /**
  26. * Adds a message for unsuccessful theme switch.
  27. *
  28. * Prints an update nag after an unsuccessful attempt to switch to
  29. * seedlet on WordPress versions prior to 4.7.
  30. *
  31. * @since seedlet 1.0.0
  32. *
  33. * @global string $wp_version WordPress version.
  34. */
  35. function seedlet_upgrade_notice() {
  36. $message = sprintf( __( 'Seedlet requires at least WordPress version 4.7. You are running version %s. Please upgrade and try again.', 'seedlet' ), $GLOBALS['wp_version'] );
  37. printf( '<div class="error"><p>%s</p></div>', $message );
  38. }
  39. /**
  40. * Prevents the Customizer from being loaded on WordPress versions prior to 4.7.
  41. *
  42. * @since seedlet 1.0.0
  43. *
  44. * @global string $wp_version WordPress version.
  45. */
  46. function seedlet_customize() {
  47. wp_die(
  48. sprintf(
  49. __( 'Seedlet requires at least WordPress version 4.7. You are running version %s. Please upgrade and try again.', 'seedlet' ),
  50. $GLOBALS['wp_version']
  51. ),
  52. '',
  53. array(
  54. 'back_link' => true,
  55. )
  56. );
  57. }
  58. add_action( 'load-customize.php', 'seedlet_customize' );
  59. /**
  60. * Prevents the Theme Preview from being loaded on WordPress versions prior to 4.7.
  61. *
  62. * @since seedlet 1.0.0
  63. *
  64. * @global string $wp_version WordPress version.
  65. */
  66. function seedlet_preview() {
  67. if ( isset( $_GET['preview'] ) ) {
  68. wp_die( sprintf( __( 'Seedlet requires at least WordPress version 4.7. You are running version %s. Please upgrade and try again.', 'seedlet' ), $GLOBALS['wp_version'] ) );
  69. }
  70. }
  71. add_action( 'template_redirect', 'seedlet_preview' );