atanh            2891 ext/standard/basic_functions.c 	PHP_FE(atanh,															arginfo_atanh)
atanh             268 ext/standard/math.c 	return(atanh(z));
atanh             663 ext/standard/math.c PHP_FUNCTION(atanh)
atanh              85 ext/standard/php_math.h PHP_FUNCTION(atanh);