zend_dtoa        3703 Zend/zend_strtod.c zend_dtoa
zend_dtoa          29 Zend/zend_strtod.h ZEND_API char * zend_dtoa(double _d, int mode, int ndigits, int *decpt, int *sign, char **rve);
zend_dtoa          96 main/snprintf.c 		p = zend_dtoa(value, fmode + 2, ndigit, decpt, sign, &rve);
zend_dtoa         147 main/snprintf.c 	digits = zend_dtoa(value, 2, ndigit, &decpt, &sign, NULL);