我的服务器上的奇怪问题 - bigint转换为指数

I have a strange issue on my server. BigInt gets converted to exponential format.

echo '12345678912345678911';
output
1.2345678912346E+19

these are tweets id's returned by twitter api , it works fine on one server but for some server it get converted to exonetial format can i do something via php.ini to fix it I want it in string format only. Please help me.