Date & Time issue


In Centos i have corrected date and time then i reinstalled the suite crm and set the time to GMT +5.30, after diagnosing and multiple tries in directory php.ini file , i corrected the time multiple time but it shows no value in php .ini file, anyhow it is not showing the present time due to which my cron jobs are unable to run.
Please , help if anybody knows about this ASAP.