diff --git a/Zend/zend_strtod.c b/Zend/zend_strtod.c
index 4b44a144292..3e7f90378ef 100644
--- a/Zend/zend_strtod.c
+++ b/Zend/zend_strtod.c
@@ -4507,6 +4507,105 @@ ZEND_API double zend_bin_strtod(const char *str, const char **endptr)
 	return value;
 }
 
+ZEND_API char *zend_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf)
+{
+	char *digits, *dst, *src;
+	int i, decpt;
+	bool sign;
+	int mode = ndigit >= 0 ? 2 : 0;
+
+	if (mode == 0) {
+		ndigit = 17;
+	}
+	digits = zend_dtoa(value, mode, ndigit, &decpt, &sign, NULL);
+	if (decpt == 9999) {
+		/*
+		 * Infinity or NaN, convert to inf or nan with sign.
+		 * We assume the buffer is at least ndigit long.
+		 */
+		snprintf(buf, ndigit + 1, "%s%s", (sign && *digits == 'I') ? "-" : "", *digits == 'I' ? "INF" : "NAN");
+		zend_freedtoa(digits);
+		return (buf);
+	}
+
+	dst = buf;
+	if (sign) {
+		*dst++ = '-';
+	}
+
+	if ((decpt >= 0 && decpt > ndigit) || decpt < -3) { /* use E-style */
+		/* exponential format (e.g. 1.2345e+13) */
+		if (--decpt < 0) {
+			sign = 1;
+			decpt = -decpt;
+		} else {
+			sign = 0;
+		}
+		src = digits;
+		*dst++ = *src++;
+		*dst++ = dec_point;
+		if (*src == '\0') {
+			*dst++ = '0';
+		} else {
+			do {
+				*dst++ = *src++;
+			} while (*src != '\0');
+		}
+		*dst++ = exponent;
+		if (sign) {
+			*dst++ = '-';
+		} else {
+			*dst++ = '+';
+		}
+		if (decpt < 10) {
+			*dst++ = '0' + decpt;
+			*dst = '\0';
+		} else {
+			/* XXX - optimize */
+			int n;
+			for (n = decpt, i = 0; (n /= 10) != 0; i++);
+			dst[i + 1] = '\0';
+			while (decpt != 0) {
+				dst[i--] = '0' + decpt % 10;
+				decpt /= 10;
+			}
+		}
+	} else if (decpt < 0) {
+		/* standard format 0. */
+		*dst++ = '0';   /* zero before decimal point */
+		*dst++ = dec_point;
+		do {
+			*dst++ = '0';
+		} while (++decpt < 0);
+		src = digits;
+		while (*src != '\0') {
+			*dst++ = *src++;
+		}
+		*dst = '\0';
+	} else {
+		/* standard format */
+		for (i = 0, src = digits; i < decpt; i++) {
+			if (*src != '\0') {
+				*dst++ = *src++;
+			} else {
+				*dst++ = '0';
+			}
+		}
+		if (*src != '\0') {
+			if (src == digits) {
+				*dst++ = '0';   /* zero before decimal point */
+			}
+			*dst++ = dec_point;
+			for (i = decpt; digits[i] != '\0'; i++) {
+				*dst++ = digits[i];
+			}
+		}
+		*dst = '\0';
+	}
+	zend_freedtoa(digits);
+	return (buf);
+}
+
 static void destroy_freelist(void)
 {
 	int i;
diff --git a/Zend/zend_strtod.h b/Zend/zend_strtod.h
index 232a4d71e42..b049e56e370 100644
--- a/Zend/zend_strtod.h
+++ b/Zend/zend_strtod.h
@@ -24,7 +24,8 @@
 
 BEGIN_EXTERN_C()
 ZEND_API void zend_freedtoa(char *s);
-ZEND_API char * zend_dtoa(double _d, int mode, int ndigits, int *decpt, bool *sign, char **rve);
+ZEND_API char *zend_dtoa(double _d, int mode, int ndigits, int *decpt, bool *sign, char **rve);
+ZEND_API char *zend_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf);
 ZEND_API double zend_strtod(const char *s00, const char **se);
 ZEND_API double zend_hex_strtod(const char *str, const char **endptr);
 ZEND_API double zend_oct_strtod(const char *str, const char **endptr);
@@ -33,4 +34,12 @@ ZEND_API int zend_startup_strtod(void);
 ZEND_API int zend_shutdown_strtod(void);
 END_EXTERN_C()
 
+/* double limits */
+#include <float.h>
+#if defined(DBL_MANT_DIG) && defined(DBL_MIN_EXP)
+#define ZEND_DOUBLE_MAX_LENGTH (3 + DBL_MANT_DIG - DBL_MIN_EXP)
+#else
+#define ZEND_DOUBLE_MAX_LENGTH 1080
+#endif
+
 #endif
diff --git a/ext/json/json_encoder.c b/ext/json/json_encoder.c
index 25f41d57f52..59f62b610d4 100644
--- a/ext/json/json_encoder.c
+++ b/ext/json/json_encoder.c
@@ -80,11 +80,11 @@ static inline int php_json_is_valid_double(double d) /* {{{ */
 static inline void php_json_encode_double(smart_str *buf, double d, int options) /* {{{ */
 {
 	size_t len;
-	char num[PHP_DOUBLE_MAX_LENGTH];
+	char num[ZEND_DOUBLE_MAX_LENGTH];
 
-	php_gcvt(d, (int)PG(serialize_precision), '.', 'e', num);
+	zend_gcvt(d, (int)PG(serialize_precision), '.', 'e', num);
 	len = strlen(num);
-	if (options & PHP_JSON_PRESERVE_ZERO_FRACTION && strchr(num, '.') == NULL && len < PHP_DOUBLE_MAX_LENGTH - 2) {
+	if (options & PHP_JSON_PRESERVE_ZERO_FRACTION && strchr(num, '.') == NULL && len < ZEND_DOUBLE_MAX_LENGTH - 2) {
 		num[len++] = '.';
 		num[len++] = '0';
 		num[len] = '\0';
diff --git a/ext/mysqlnd/mysql_float_to_double.h b/ext/mysqlnd/mysql_float_to_double.h
index 0a704b904a7..a15458b52de 100644
--- a/ext/mysqlnd/mysql_float_to_double.h
+++ b/ext/mysqlnd/mysql_float_to_double.h
@@ -38,7 +38,7 @@ static inline double mysql_float_to_double(float fp4, int decimals) {
 	char num_buf[MAX_CHAR_BUF_LEN]; /* Over allocated */
 
 	if (decimals < 0) {
-		php_gcvt(fp4, FLT_DIG, '.', 'e', num_buf);
+		zend_gcvt(fp4, FLT_DIG, '.', 'e', num_buf);
 	} else {
 		snprintf(num_buf, MAX_CHAR_BUF_LEN, "%.*F", decimals, fp4);
 	}
diff --git a/ext/soap/php_encoding.c b/ext/soap/php_encoding.c
index feb8e583c13..5890ef92897 100644
--- a/ext/soap/php_encoding.c
+++ b/ext/soap/php_encoding.c
@@ -1083,7 +1083,7 @@ static xmlNodePtr to_xml_double(encodeTypePtr type, zval *data, int style, xmlNo
 	ZVAL_DOUBLE(&tmp, zval_get_double(data));
 
 	str = (char *) safe_emalloc(EG(precision) >= 0 ? EG(precision) : 17, 1, MAX_LENGTH_OF_DOUBLE + 1);
-	php_gcvt(Z_DVAL(tmp), EG(precision), '.', 'E', str);
+	zend_gcvt(Z_DVAL(tmp), EG(precision), '.', 'E', str);
 	xmlNodeSetContentLen(ret, BAD_CAST(str), strlen(str));
 	efree(str);
 
diff --git a/ext/standard/formatted_print.c b/ext/standard/formatted_print.c
index 71c1bbcbd93..c1032ee3f6b 100644
--- a/ext/standard/formatted_print.c
+++ b/ext/standard/formatted_print.c
@@ -299,7 +299,7 @@ php_sprintf_appenddouble(zend_string **buffer, size_t *pos,
 
 			char exp_char = fmt == 'G' || fmt == 'H' ? 'E' : 'e';
 			/* We use &num_buf[ 1 ], so that we have room for the sign. */
-			s = php_gcvt(number, precision, decimal_point, exp_char, &num_buf[1]);
+			s = zend_gcvt(number, precision, decimal_point, exp_char, &num_buf[1]);
 			is_negative = 0;
 			if (*s == '-') {
 				is_negative = 1;
diff --git a/ext/standard/var.c b/ext/standard/var.c
index 4d00ec8060e..24eac781a06 100644
--- a/ext/standard/var.c
+++ b/ext/standard/var.c
@@ -480,7 +480,7 @@ static void php_object_element_export(zval *zv, zend_ulong index, zend_string *k
 PHPAPI void php_var_export_ex(zval *struc, int level, smart_str *buf) /* {{{ */
 {
 	HashTable *myht;
-	char tmp_str[PHP_DOUBLE_MAX_LENGTH];
+	char tmp_str[ZEND_DOUBLE_MAX_LENGTH];
 	zend_string *ztmp, *ztmp2;
 	zend_ulong index;
 	zend_string *key;
@@ -508,7 +508,7 @@ again:
 			smart_str_append_long(buf, Z_LVAL_P(struc));
 			break;
 		case IS_DOUBLE:
-			php_gcvt(Z_DVAL_P(struc), (int)PG(serialize_precision), '.', 'E', tmp_str);
+			zend_gcvt(Z_DVAL_P(struc), (int)PG(serialize_precision), '.', 'E', tmp_str);
 			smart_str_appends(buf, tmp_str);
 			/* Without a decimal point, PHP treats a number literal as an int.
 			 * This check even works for scientific notation, because the
@@ -1038,8 +1038,8 @@ again:
 			return;
 
 		case IS_DOUBLE: {
-			char tmp_str[PHP_DOUBLE_MAX_LENGTH];
-			php_gcvt(Z_DVAL_P(struc), (int)PG(serialize_precision), '.', 'E', tmp_str);
+			char tmp_str[ZEND_DOUBLE_MAX_LENGTH];
+			zend_gcvt(Z_DVAL_P(struc), (int)PG(serialize_precision), '.', 'E', tmp_str);
 
 			size_t len = strlen(tmp_str);
 			char *res = smart_str_extend(buf, 2 + len + 1);
diff --git a/main/php.h b/main/php.h
index ee95cdfe629..3b80a589c29 100644
--- a/main/php.h
+++ b/main/php.h
@@ -245,13 +245,7 @@ typedef unsigned int socklen_t;
 #define INT_MIN (- INT_MAX - 1)
 #endif
 
-/* double limits */
-#include <float.h>
-#if defined(DBL_MANT_DIG) && defined(DBL_MIN_EXP)
-#define PHP_DOUBLE_MAX_LENGTH (3 + DBL_MANT_DIG - DBL_MIN_EXP)
-#else
-#define PHP_DOUBLE_MAX_LENGTH 1080
-#endif
+#define PHP_DOUBLE_MAX_LENGTH ZEND_DOUBLE_MAX_LENGTH
 
 #define PHP_GCC_VERSION ZEND_GCC_VERSION
 #define PHP_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_MALLOC
diff --git a/main/snprintf.c b/main/snprintf.c
index d86bffd44ef..62b73587c0e 100644
--- a/main/snprintf.c
+++ b/main/snprintf.c
@@ -128,106 +128,6 @@ static inline char *php_fcvt(double value, int ndigit, int *decpt, bool *sign) /
 }
 /* }}} */
 
-PHPAPI char *php_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf) /* {{{ */
-{
-	char *digits, *dst, *src;
-	int i, decpt;
-	bool sign;
-	int mode = ndigit >= 0 ? 2 : 0;
-
-	if (mode == 0) {
-		ndigit = 17;
-	}
-	digits = zend_dtoa(value, mode, ndigit, &decpt, &sign, NULL);
-	if (decpt == 9999) {
-		/*
-		 * Infinity or NaN, convert to inf or nan with sign.
-		 * We assume the buffer is at least ndigit long.
-		 */
-		snprintf(buf, ndigit + 1, "%s%s", (sign && *digits == 'I') ? "-" : "", *digits == 'I' ? "INF" : "NAN");
-		zend_freedtoa(digits);
-		return (buf);
-	}
-
-	dst = buf;
-	if (sign) {
-		*dst++ = '-';
-	}
-
-	if ((decpt >= 0 && decpt > ndigit) || decpt < -3) { /* use E-style */
-		/* exponential format (e.g. 1.2345e+13) */
-		if (--decpt < 0) {
-			sign = 1;
-			decpt = -decpt;
-		} else {
-			sign = 0;
-		}
-		src = digits;
-		*dst++ = *src++;
-		*dst++ = dec_point;
-		if (*src == '\0') {
-			*dst++ = '0';
-		} else {
-			do {
-				*dst++ = *src++;
-			} while (*src != '\0');
-		}
-		*dst++ = exponent;
-		if (sign) {
-			*dst++ = '-';
-		} else {
-			*dst++ = '+';
-		}
-		if (decpt < 10) {
-			*dst++ = '0' + decpt;
-			*dst = '\0';
-		} else {
-			/* XXX - optimize */
-			int n;
-			for (n = decpt, i = 0; (n /= 10) != 0; i++);
-			dst[i + 1] = '\0';
-			while (decpt != 0) {
-				dst[i--] = '0' + decpt % 10;
-				decpt /= 10;
-			}
-		}
-	} else if (decpt < 0) {
-		/* standard format 0. */
-		*dst++ = '0';   /* zero before decimal point */
-		*dst++ = dec_point;
-		do {
-			*dst++ = '0';
-		} while (++decpt < 0);
-		src = digits;
-		while (*src != '\0') {
-			*dst++ = *src++;
-		}
-		*dst = '\0';
-	} else {
-		/* standard format */
-		for (i = 0, src = digits; i < decpt; i++) {
-			if (*src != '\0') {
-				*dst++ = *src++;
-			} else {
-				*dst++ = '0';
-			}
-		}
-		if (*src != '\0') {
-			if (src == digits) {
-				*dst++ = '0';   /* zero before decimal point */
-			}
-			*dst++ = dec_point;
-			for (i = decpt; digits[i] != '\0'; i++) {
-				*dst++ = digits[i];
-			}
-		}
-		*dst = '\0';
-	}
-	zend_freedtoa(digits);
-	return (buf);
-}
-/* }}} */
-
 /* {{{ Apache license */
 /* ====================================================================
  * Copyright (c) 1995-1998 The Apache Group.  All rights reserved.
@@ -1043,7 +943,7 @@ static size_t format_converter(buffy * odp, const char *fmt, va_list ap) /* {{{
 						lconv = localeconv();
 					}
 #endif
-					s = php_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]);
+					s = zend_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]);
 					if (*s == '-') {
 						prefix_char = *s++;
 					} else if (print_sign) {
diff --git a/main/snprintf.h b/main/snprintf.h
index 1cb1a4e4e45..d4140c8cee1 100644
--- a/main/snprintf.h
+++ b/main/snprintf.h
@@ -75,13 +75,14 @@ PHPAPI int ap_php_snprintf(char *, size_t, const char *, ...) ZEND_ATTRIBUTE_FOR
 PHPAPI int ap_php_vsnprintf(char *, size_t, const char *, va_list ap);
 PHPAPI int ap_php_vasprintf(char **buf, const char *format, va_list ap);
 PHPAPI int ap_php_asprintf(char **buf, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);
-PHPAPI char * php_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf);
 PHPAPI char * php_0cvt(double value, int ndigit, char dec_point, char exponent, char *buf);
 PHPAPI char * php_conv_fp(char format, double num,
 		 bool add_dp, int precision, char dec_point, bool * is_negative, char *buf, size_t *len);
 
 END_EXTERN_C()
 
+#define php_gcvt zend_gcvt
+
 #ifdef slprintf
 #undef slprintf
 #endif
@@ -138,7 +139,7 @@ PHPAPI char * ap_php_conv_p2(uint64_t num, int nbits,
  * another level (see NDIG in php_conv_fp()).
  * Applies to the formatting functions of both spprintf.c and snprintf.c, which
  * use equally sized buffers of MAX_BUF_SIZE = 512 to hold the result of the
- * call to php_gcvt().
+ * call to zend_gcvt().
  * This should be reasonably smaller than MAX_BUF_SIZE (I think MAX_BUF_SIZE - 9
  * should be enough, but let's give some more space) */
 #define FORMAT_CONV_MAX_PRECISION 500
diff --git a/main/spprintf.c b/main/spprintf.c
index 26d44a1b27b..deb57e93f3d 100644
--- a/main/spprintf.c
+++ b/main/spprintf.c
@@ -141,7 +141,7 @@
  * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions
  * which can be at most max length of double
  */
-#define NUM_BUF_SIZE PHP_DOUBLE_MAX_LENGTH
+#define NUM_BUF_SIZE ZEND_DOUBLE_MAX_LENGTH
 
 #define NUM(c) (c - '0')
 
@@ -651,7 +651,7 @@ static void xbuf_format_converter(void *xbuf, bool is_char, const char *fmt, va_
 						lconv = localeconv();
 					}
 #endif
-					s = php_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]);
+					s = zend_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]);
 					if (*s == '-')
 						prefix_char = *s++;
 					else if (print_sign)