PHP JSON large integers

问题:

I am using json_encode to transform my php multidimensional array to output json. Normally, this function would convert all values to strings. To make sure that integers values are send to javascript as integer values, I am using the numeric check:

$json = json_encode($data, JSON_NUMERIC_CHECK);

This works fine in all but one case for my app. In the php array (which is extracted from the database), there is one field that contains very large integers. I save it to database as a VARCHAR, but unfortunately this is converted to an integer when encoding to json. The problem is that since this is a very large integer, it gets rounded and therefore does not represent the true value. How could I tackle this problem?

回答1:

Do you want the large number to be transformed to an integer? Your question leads me to believe you don't. If that's the case, remove the JSON_NUMERIC_CHECK option from the call and it shouldn't change the encoding of the field.

Documentation about this (and other) constants is here.

回答2:

Maybe is to late but i did hit the same problem, and stuck on PHP 5.3 on the server because of legacy code that must be run with that version. The solution that i used is dumb, but did work for me: simple add an space character at the end of the long integer that is varchar readed from the db, and before sending it to json encode with JSON_NUMERIC_CHECK.