trick integer 2 match string

// my trick is not good idea ;-(
uint64_t x=*(uint64_t *)"action =";
 char *var="action =gijoe comando teste";
 uint64_t z=*(uint64_t *)var;

 if(x==z)
        puts("OK");
 else
        puts("Nops");
// what this it ?
http://en.wikipedia.org/wiki/Magic_number_%28programming%29#Unnamed_numerical_constants