Empty lines, chars or spaces after ?> when using an php include file ... ... But ignoring errors won't make the problem go away. But as soon as I put it back down to 5.3, the issue goes away. To sum up, turning on the "output_buffering" variable in php.ini fixes this problem. http://ibuildsystem.com/cannot-modify/warning-cannot-modify-header-information-headers-already-sent.php
Do the Leaves of Lórien brooches have any special significance or attributes? The majority of the time there is no harm in calling ob_start(). –SamHennessy Aug 20 '14 at 21:14 Is this good practise? The problem you face is that you are trying to use the PHP header function, header(), but there can be absolutely no HTML output before this function is declared. Viewing 15 replies - 1 through 15 (of 16 total) 1 2 → t-p @t-p 1 year ago - Try reviewing this codex to solve header already sent problem: http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F tizianogrifoni
It's occasionally the gzip stream encoding setting or the ob_gzhandler. asked 5 years ago viewed 665251 times active 1 year ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Linked 63 Warning: Cannot modify header information - headers already sent tizianogrifoni @tizianogrifoni 1 year ago Thanks again. One of the more thorough explanations is HTTP Headers and the PHP header() Function - A tutorial by NicholasSolutions (Internet Archive link).
What do I do? If this error arise on a specific page then make sure that page is not echoing anything before calling to start_session(). PHP however has to treat it as raw output. Warning Cannot Modify Header Information - Headers Already Sent By (output Started At /home/content Why use output buffering in PHP?
If indeed it's cause by a plugin, you can start finding it by enabling one plugin at a time, and re-loading your website. Headers Already Sent By Wordpress Attempting to login to wp-login.php i receive the following; Warning: Cannot modify header information - headers already sent by (output started at /websites/LinuxPackage05/7y/tz/nj/mysite-hosting.co.uk/public_html/wp-includes/pluggable.php:1) in /websites/LinuxPackage05/7y/tz/nj/7ytznj-256344.mysite-hosting.co.uk/public_html/wp-login.php on line 390 Warning: Cannot modify Bug? Browse other questions tagged php header or ask your own question.
Example of Unpredictable Error: