This is due to your PHP version being < 5.3. If you wish to resolve this error you will need to upgrade your PHP version. We do advise doing a full backup of your SuiteCRM instance/server before upgrading your PHP version.
Thanks for your quick reply,
I have one more question, just asking for my curiosity.
Is there any mobile application for SuiteCRM ? Similar to SugarCRM pro.
Today is my first day i am using SuiteCRM. Really its a great experience