tanh             2895 ext/standard/basic_functions.c 	PHP_FE(tanh,															arginfo_tanh)
tanh              606 ext/standard/math.c PHP_FUNCTION(tanh)
tanh              619 ext/standard/math.c 	RETURN_DOUBLE(tanh(num));
tanh               81 ext/standard/php_math.h PHP_FUNCTION(tanh);