include vs require_once

[codecowboy]

//include "clsUtilities.php";
//include "clsStaticMySqlUtilities.php";
require_once('clsUtilities.php');
require_once('clsStaticMySqlUtilities.php');
class MySqlInterface{

I had to use require_once('blah') as opposed to include 'blah' in all of my php classes. However, I did not have to use require_once('blah') in my non class files. Does anyone no what the difference is between these two methods of including classes in php?

Thank you for any light that you shed on the subject

[thorpe]

the manual says it all.

[Weedpacket]

Yes; and all the differences are described in the manual under [man]include[/man], [man]require_once[/man], [man]require[/man] and [man]include_once[/man].