Home/ Questions/Q 54163
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-10T17:10:37+00:00

We have a customer that is trying to call our web service written in

  • 0

We have a customer that is trying to call our web service written in C# from PHP code. The web service call takes a long as parameter.

This call works fine for other customers calling from C# or Java but this customer is getting an error back from the call. I haven’t debugged their specific call but I am guessing that the 64bit integer is getting truncated somehow from PHP. The customer says they are just making the web service call with a string but is there a wrapper in PHP that does type conversion. Could this be losing the number information?

Thanks for any info.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Most PHP installations won’t support 64 bit integers – 32 is the max. You can check this by reading the PHP_INT_SIZE constant (4 = 32bit, 8 = 64bit) or read the PHP_INT_MAX value.

    <?php  echo PHP_INT_SIZE, '\n', PHP_INT_MAX;  ?>

    If the web service class he is using is trying to type-convert a string representation of a 64 bit integer, then yes, it’s mostly likely being truncated or converted into a float. You can sort of see this behavior with this simple test

    <?php  echo intval( '12345678901234567890' ); // prints 2147483647, the max value for a 32 bit signed int.

    Without knowing the details of his implementation, it’s difficult to postulate on what a good solution/workaround might be.

    • 0