Smarty if statements and big numbers

This code

{if 10111060108552250999929 == 10111060108552250999924} 
true1 
{/if} 
{if 10111060108552250999929 == 20111060108552250999924} 
true2 
开发者_如何学Go{/if}

outputs 'true1' but neither statement is true.

Does Smarty have a maximum size for comparing integers? If so, why does it appear to be a bit "fuzzy"?

Hopefully I've just made a stupid mistake.

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It's the problem with PHP's integer type overflow. It varies based on the OS bit (32/64).

Please see:

If PHP encounters a number beyond the bounds of the integer type, it will be interpreted as a float instead. Also, an operation which results in a number beyond the bounds of the integer type will return a float instead.

http://www.php.net/manual/en/language.types.integer.php#language.types.integer.overflow

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Since these numbers are too large for the regular int type, Smarty will (as per the automatic conversion PHP does) be comparing them as floats, resulting in loss of precision.

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You should consider writing a comparsion plugin for smarty usin BCMath, therefore big numbers will be handled correctly.

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I might be wrong, but your second if statement is always false...as those numbers are not the same..