Turn off deprecated errors in PHP 5.3

Solution:1

You can do it in code by calling the following functions.

error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);

or

error_reporting(E_ALL ^ E_DEPRECATED);

Solution:2

To only get those errors that cause the application to stop working, use:

error_reporting(E_ALL ^ (E_NOTICE | E_WARNING | E_DEPRECATED));

This will stop showing notices, warnings, and deprecated errors.

Solution:3

You have to edit the PHP configuration file. Find the line

error_reporting = E_ALL

and replace it with:

error_reporting = E_ALL ^ E_DEPRECATED

If you don’t have access to the configuration file you can add this line to the PHP WordPress file (maybe headers.php):

error_reporting(E_ALL ^ E_DEPRECATED);

Solution:4

I just faced a similar problem where a SEO plugin issued a big number of warnings making my blog disk use exceed the plan limit.

I found out that you must include the error_reporting command after the wp-settings.php require in the wp-config.php file:

   require_once( ABSPATH .'wp-settings.php' );
   error_reporting( E_ALL ^ ( E_NOTICE | E_WARNING | E_DEPRECATED ) );

by doing this no more warnings, notices nor deprecated lines are appended to your error log file!

Tested on WordPress 3.8 but I guess it works for every installation.