Description
resource 
gmp_sub ( resource a, resource b )
     Subtracts b from a
     and returns the result.
    
例子 1. gmp_sub() example 
<?php $sub = gmp_sub("281474976710656", "4294967296"); // 2^48 - 2^32 echo gmp_strval($sub) . "\n"; ?>
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      The printout of the above program will be:
       |