gmp_sign Sign of number &reftitle.description; intgmp_sign GMPa Checks the sign of a number. &reftitle.parameters; a Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to an integer. &reftitle.returnvalues; Returns 1 if a is positive, -1 if a is negative, and 0 if a is zero. &reftitle.examples; ]]> &example.outputs; &reftitle.seealso; gmp_abs abs