usort(): Array was modified by the user comparison function

Question

I have a web application that runs fine on our Linux servers but when running on Mac OS with the Zend Community Edition Server using PHP 5.3 we get the error:

Answer 1

I found that using PHP5.4 , logging with error_log($message, $message_type, $destination, $extra_headers) causes this error , when I clean log entries my problem solved. Logging may temporarily be suspended by disabling and restoring logging after sort function.