我怎么从PHP刷新apache?

i have problem with the refresh of apache from php, in some forums I've seen it recommended the implementation of cron script, but am new to this, someone knows that I can implement to bring this comprehensive and besides the best way for the system task, because I already know the problems get off and upload apache....

any help or opinion will be well received

good night

$output = shell_exec('service apache2 restart');
echo "<pre>$output</pre>";

shell_exec('shell_command');

You can execute shell commands by using this function.

Note: It will instantly shut down Apache so I don't know what happens in result. You should try to see.