{"id":16251901,"date":"2022-12-01T14:34:01","date_gmt":"2022-12-01T14:34:01","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/output-buffer-error-2\/"},"modified":"2022-12-01T14:34:01","modified_gmt":"2022-12-01T14:34:01","slug":"output-buffer-error-2","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/output-buffer-error-2\/","title":{"rendered":"output buffer error"},"content":{"rendered":"

Hi! There seems to be an error in your code, within this file:
\nwp-content\\plugins\\post-grid\\includes\\classes\\class-admin-notices.php
\nfrom line 33. you have a similar code structure:<\/p>\n

if ($screen->id == 'edit-post_grid_layout' ... ) :\n\n\tob_start();\n\n\tif ( ... ) :\n        ...\n\tendif;\n\nendif;\n\necho(ob_get_clean());<\/code><\/pre>\n
The problem with this is, that you have “ob_get_clean” outside the “if”, where “ob_start” is. This way when you won’t go inside that “if”, you are closing the output buffer which wasn’t started by you. So the fix I’m suggesting is this:<\/p>\n
if ($screen->id == 'edit-post_grid_layout' ... ) :\n\n\tob_start();\n\n\tif ( ... ) :\n        ...\n\tendif;\n\n\techo(ob_get_clean());\n\nendif;<\/code><\/pre>\n
to move the “ob_get_clean” inside the “if” too. Would it be possible for you to modify your code to this?<\/p>\n
If you need a test, you could use for example this code within the functions.php file of your theme:<\/p>\n
add_action('admin_notices', 'start_test', 1);\nadd_action('admin_notices', 'end_test', 11);\n\nfunction start_test() {\n\tob_start();\n}\n\nfunction end_test() {\n\tob_get_clean();\n}<\/code><\/pre>\n
and visit a page, where your “if” doesn’t runs, like in the wp-admin area the Posts or Plugins page. This code will mess up the page, until the fix is done.<\/p>\n","protected":false},"template":"","class_list":["post-16251901","topic","type-topic","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/16251901","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/16251901\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=16251901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}