doing_wp_cron – doing wp cron displayed in Browser

[AITpro Admin]

If you are using this constant in your wp-config.php file:  define( 'ALTERNATE_WP_CRON', true );   then you will see something very similar to this:  http://forum.ait-pro.com/?doing_wp_cron=1386111559.8750269412994384765625 in your Browser.  Why does that occur?  I have no idea, but if you are wondering why you are seeing doing_wp_cron in your Browser then this is the reason for that.  It is also possible that a plugin that you have installed is using/defining this constant somewhere else other than in your wp-config.php file.  This code will also cause these php errors: PHP Warning: Cannot modify header information – headers already sent.  See examples below.

WordPress Codex Editing wp-config.php

http://codex.wordpress.org/Editing_wp-config.php#Alternative_Cron

Alternative Cron

Use this, for example, if scheduled posts are not getting published. According to Otto’s forum explanation , “this alternate method uses a redirection approach, which makes the users browser get a redirect when the cron needs to run, so that they come back to the site immediately while cron continues to run in the connection they just dropped. This method is a bit iffy sometimes, which is why it’s not the default.”

define( 'ALTERNATE_WP_CRON', true );

Solution:
This code is known to be problematic.  If you are running into problems with standard WP Crons then setup a Direct Cron job in your web host control panel.  The correct cron interval is 1 minute.  Any other cron interval time interval is incorrect and will cause problems for Plugins and Themes that run Cron jobs.  After setting up a Direct Cron job add this code in your wp-config.php file: define( 'DISABLE_WP_CRON', true );

PHP Warning: Cannot modify header information – headers already sent errors:

[02-Feb-2022 02:09:55 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-admin/admin-header.php on line 9
[02-Feb-2022 02:57:22 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-includes/pluggable.php on line 1355
[02-Feb-2022 02:57:22 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-includes/pluggable.php on line 1358
[02-Feb-2022 04:02:40 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-includes/pluggable.php on line 1355
[02-Feb-2022 04:02:40 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-includes/pluggable.php on line 1358
[02-Feb-2022 04:03:09 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-login.php on line 462
[02-Feb-2022 04:03:09 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-login.php on line 478
[02-Feb-2022 04:03:09 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-includes/functions.php on line 6821
[02-Feb-2022 04:03:09 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/thelair/wp-includes/functions.php:5212) in /home/xxxxx/public_html/thelair/wp-includes/pluggable.php on line 1046

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