Suppressing output from exec() calls in PHP

Question

I have a number of command line scripts in PHP that use exec() to perform tasks such as restarting services, loading MySQL timezone files, etc. While exec() itself does not

Answer 1

Just redirect stderr to /dev/null

$command = 'mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql mysql 2>/dev/null';

or to stdout

$command = 'mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql mysql 2>&1';