How to send SMS or Push Notifications to million records with PHP

I am new to this mobile technology and in PHP. I have about two or two and half records where I have to send SMSs as well as push notifications on the mobiles. With PHP, i have tried with simple looping technique, but it seems it is not the right way as some times SMSs are missed from the number. Also, don't want to use third party APIs.

I want to have some ideas how to deal this records with PHP script.