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Newbie plugin writer - get a "Cannot modify header information" error (2 posts)

  1. skromta
    Member
    Posted 6 years ago #

    I'm trying to create a filter and it seem to be working when I view the postings but when I go to the admin page and save a change I get an warning about not being able to modify header information

    Warning: Cannot modify header information - headers already sent by (output started at /xxxxxxxxxx/wordpress/wp-content/plugins/jimagetags.php:55) in /xxxxxxxxxx/wordpress/wp-includes/pluggable.php on line 770

    But I can't figure out what I'm doing wrong, does anyone have a suggestion what kind of error I should be looking for? Please note that I'm completely new to writing stuff for WP so I'm probably missing something really basic.

  2. skromta
    Member
    Posted 6 years ago #

    Forget it, 5 seconds after writing that I found it ... a trailing space

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