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headers already sent in 3.3 plugin redirect (2 posts)

  1. tigusigalpa
    Member
    Posted 2 years ago #

    Today i've updated the test site to 3.3 (now i'm creating a plugin on this one). I have an action on form submit and at the finish i'm redirect user to the page via wp_safe_redirect.
    But on 3.3 version i've get a message:
    Warning: Cannot modify header information - headers already sent by (output started at /PATH/wp-admin/includes/template.php:1657) in /PATH/wp-includes/pluggable.php on line 866
    Really in 3.3 the file /wp-admin/includes/template.php was changed, and now function _wp_admin_html_begin send html before checking actions => error.

  2. The problem is likely caused by a plugin (since pluggable.php is involved). Try deactivating them one at a time.

    This error is quite common, here's a similar forum post -
    http://wordpress.org/support/topic/cannot-modify-header-information-headers-already-sent-4?replies=24

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