Warning: Massive error in json_encode()

Question

Recieved in browser: [ \"1968401665333658496\"

Answer 1

Quote your integer value and handle the conversion on the client.

Answer 2

It's not just a JSON issue. If you put

alert(1968401665333658496);

in firebug console you get 1968401665333658600

You're probably hitting the JS max value.

There's a discussion on that here : What is JavaScript's highest integer value that a Number can go to without losing precision?

Answer 3

Javascript has no concept of integers, according to the standard all numbers are IEEE doubles, which means they have 52 bits of mantissa. this leads to a practical maximum "integer" value of 2^53 before any loss of precision.

I am not sure how you didn't have problems with numbers this large in JS alone - if you didn't your JS implementation is not standards compliant.