In widget, the value of select field doesn’t get updated, changes after saving

Use get_the_ID() instead of the_ID(). the_ID() will echo’ed the ID of posting:

<option value="<? the_ID(); ?>" <?php selected(get_the_ID(), $instance['post_to_display']); ?>><?php the_title(); ?></option>

Related Posts:

  1. SELECT field options disappear when saving widget
  2. Indexes of widgets instances starts with ‘2’ in ‘wp_options’ table
  3. How to update widget from widget() function?
  4. Add a select box to all widgets
  5. Separate backend “Widgets” page for each language
  6. How to access widget data from outside widget?
  7. Custom widget using get_categories select menu dropdown
  8. Creating a one click demo importer
  9. Custom widget select options needs to stay selected after save
  10. Why does WordPress stores widget options in a multidimensional array?
  11. How to save widget fields generated from an array?
  12. get_option returns undesired blank instance of a widget
  13. How to get options of all active widgets ?
  14. Making jQuery .change() event persistent after widget save
  15. Widget select option not saving
  16. accessing wordpress serialized data outside wp
  17. How to update the options table for a widget
  18. Widget settings disappear after refreshing page
  19. Use customizer or sidebar for header settings?
  20. Options page for widget
  21. Passing widget options to external script
  22. Widget options – where to put them?
  23. How to load Widget javascript + css files only if used?
  24. Adding iframe Content to Sidebar Widget
  25. Storing custom dashboard widget options in wordpress
  26. $post>ID displays wrong post ID
  27. Video Embed in Sidebar Widget with Links to Others in Category
  28. Shortcode from a widget is wrapped in unwanted element
  29. How can I whitelist only specific shortcodes for processing in text widgets?
  30. Bookshelf plugin and/or widget [closed]
  31. Create a Widget Area in the Navigation Bar for the Genesis Theme Framework?
  32. Manual display of widget
  33. Add a banner to the Dashboard
  34. Customized widget area – how to override or filter class xoxo?
  35. How to add a description to Widgets?
  36. add_page_menu to make shortcut to widgets
  37. Insert custom content before widget title/after widget opening tag
  38. cannot drag and drop widgets since wordpress 3.2.1
  39. Show widget when not using SSL
  40. Color Picker Showing Twice When Widget Added to Sidebar
  41. How can I use AJAX to save/update a widget form?
  42. Display assigned terms with link
  43. Hide all Dashboard Widgets (not remove)
  44. Widget modifications in a child theme
  45. How to get “Widget Logic” plugin’s input value in a custom widget code (to display on the Widget admin page)
  46. Extending WP_Widget throws error when Monster Widget used
  47. Making footer widgets responsive
  48. Custom html widget with a Joomla-style assigment
  49. Form link throwing website to main language
  50. Conditional Tags Based on Previously Viewed Posts
  51. Make page jumps in widget
  52. Query in query for Widget
  53. How to display first post thumbnail as a background image of a widget?
  54. Create widget in dashboard displaying a custom user field?
  55. Limit number of widgets in widget area
  56. How to create pagination for homepage with widgetized area?
  57. Hooking action once but called twice
  58. How to update the widget form when the image is selected?
  59. How can I add an author-box below a post?
  60. How to overload the update() of existings widgets?
  61. Help me out with this Undefined index ?
  62. Remove “Content” and “Discussion” from Right Now Dashboard Widget
  63. wordpress widgets screen disappeared
  64. Proper approach to moving complete site from one domain to another AND preserve widgets
  65. Why custom widget won’t appear in Block editor (Gutenberg)?
  66. Can the qTranslateX-Plugin translate non-article text? [closed]
  67. Custom widget is not appearing in the admin area
  68. A/B test options at the widget level [closed]
  69. Static image for embedded YouTube video instead of blank player?
  70. event organiser not loading in main content area
  71. How do I customize the positioning of WordPress widgets?
  72. Limit archive widget results
  73. How can I detemine the parameters needed by the_widget()?
  74. Fatal error: Uncaught Error: Class ‘WP_Widget’ not found
  75. Array showing all values of loop instead of specific value to post
  76. Widget not appearing in customizer
  77. How can I have sidebar widgets on Twenty Seventeen theme on all pages?
  78. Collapsible widgets [closed]
  79. Loop through Widgets in sidebar using widget array number?
  80. add image in dropdown select
  81. How to get widget content in WordPress based on it’s ID?
  82. Loading scripts only if a particular shortcode or widget is present
  83. Make a widget to my footer
  84. Always show the widget title in a wordpress widget
  85. Custom php Widget keeps disappearing from the front end
  86. Display Posts by Views (Popular Posts Widget)
  87. Default WordPress widgets always appear
  88. Add space to the end on a widget
  89. Insert to wp_footer if widget is found in the sidebar
  90. Using javascript on the new widget preview / customizer page
  91. Show editor widgets only on pages that use a specific template?
  92. Conditionally enable autoplay when using oEmbed in a custom widget
  93. user definable sidebar per page
  94. WordPress Hide Widget If $_Session Is Active?
  95. Post Thumbnails on Sidebar Widgets
  96. Using Conditional Tags to restrict something to 1 user?
  97. Recent posts with different class name for each post and a scrollbar?
  98. Classic widgets with 5.9+?
  99. WordPress shortcode select option not working [closed]
  100. Can’t edit the widgets sidebar or footer