diff --git a/NEWS b/NEWS
index 33a9713ade2aa..cfee237a5534b 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,9 @@ PHP                                                                        NEWS
 - Standard:
   . Added $before_needle argument to strrchr(). (HypeMC)
 
+- Standard:
+  . Added 4 new rounding modes to the round(). (Jorg Sowa)
+
 17 Aug 2023, PHP 8.3.0beta3
 
 - Core:
@@ -155,6 +158,7 @@ PHP                                                                        NEWS
     (Marc Bennewitz)
   . Added usage of posix_spawn for proc_open when supported by OS.
     (Cristian Rodriguez)
+  . Added 4 new rounding modes to the round(). (Jorg Sowa)
 
 - Streams:
   . Implemented GH-11242 (_php_stream_copy_to_mem: Allow specifying a maximum
diff --git a/ext/standard/basic_functions.stub.php b/ext/standard/basic_functions.stub.php
index 66b458897adb4..8acda24291f2e 100755
--- a/ext/standard/basic_functions.stub.php
+++ b/ext/standard/basic_functions.stub.php
@@ -375,6 +375,26 @@
  * @cvalue PHP_ROUND_HALF_ODD
  */
 const PHP_ROUND_HALF_ODD = UNKNOWN;
+/**
+ * @var int
+ * @cvalue PHP_ROUND_CEILING
+ */
+const PHP_ROUND_CEILING = UNKNOWN;
+/**
+ * @var int
+ * @cvalue PHP_ROUND_FLOOR
+ */
+const PHP_ROUND_FLOOR = UNKNOWN;
+/**
+ * @var int
+ * @cvalue PHP_ROUND_TOWARD_ZERO
+ */
+const PHP_ROUND_TOWARD_ZERO = UNKNOWN;
+/**
+ * @var int
+ * @cvalue PHP_ROUND_AWAY_FROM_ZERO
+ */
+const PHP_ROUND_AWAY_FROM_ZERO = UNKNOWN;
 
 /* crypt.c */
 
diff --git a/ext/standard/basic_functions_arginfo.h b/ext/standard/basic_functions_arginfo.h
index 36b9cb1b9dce6..b71aea1fb78bd 100644
--- a/ext/standard/basic_functions_arginfo.h
+++ b/ext/standard/basic_functions_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 487cee0751d47b18bf0a8fbdb050313783f1b369 */
+ * Stub hash: 8685bba87eaaa085e2be8b9f00bbb35c58e93797 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_set_time_limit, 0, 1, _IS_BOOL, 0)
 	ZEND_ARG_TYPE_INFO(0, seconds, IS_LONG, 0)
@@ -3577,6 +3577,10 @@ static void register_basic_functions_symbols(int module_number)
 	REGISTER_LONG_CONSTANT("PHP_ROUND_HALF_DOWN", PHP_ROUND_HALF_DOWN, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PHP_ROUND_HALF_EVEN", PHP_ROUND_HALF_EVEN, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PHP_ROUND_HALF_ODD", PHP_ROUND_HALF_ODD, CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("PHP_ROUND_CEILING", PHP_ROUND_CEILING, CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("PHP_ROUND_FLOOR", PHP_ROUND_FLOOR, CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("PHP_ROUND_TOWARD_ZERO", PHP_ROUND_TOWARD_ZERO, CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("PHP_ROUND_AWAY_FROM_ZERO", PHP_ROUND_AWAY_FROM_ZERO, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("CRYPT_SALT_LENGTH", PHP_MAX_SALT_LEN, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("CRYPT_STD_DES", 1, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("CRYPT_EXT_DES", 1, CONST_PERSISTENT);
diff --git a/ext/standard/math.c b/ext/standard/math.c
index 74ffa565031a3..8f62aafef10b7 100644
--- a/ext/standard/math.c
+++ b/ext/standard/math.c
@@ -95,24 +95,56 @@ static inline double php_intpow10(int power) {
 static inline double php_round_helper(double value, int mode) {
 	double tmp_value;
 
-	if (value >= 0.0) {
-		tmp_value = floor(value + 0.5);
-		if ((mode == PHP_ROUND_HALF_DOWN && value == (-0.5 + tmp_value)) ||
-			(mode == PHP_ROUND_HALF_EVEN && value == (0.5 + 2 * floor(tmp_value/2.0))) ||
-			(mode == PHP_ROUND_HALF_ODD  && value == (0.5 + 2 * floor(tmp_value/2.0) - 1.0)))
-		{
-			tmp_value = tmp_value - 1.0;
-		}
-	} else {
-		tmp_value = ceil(value - 0.5);
-		if ((mode == PHP_ROUND_HALF_DOWN && value == (0.5 + tmp_value)) ||
-			(mode == PHP_ROUND_HALF_EVEN && value == (-0.5 + 2 * ceil(tmp_value/2.0))) ||
-			(mode == PHP_ROUND_HALF_ODD  && value == (-0.5 + 2 * ceil(tmp_value/2.0) + 1.0)))
-		{
-			tmp_value = tmp_value + 1.0;
-		}
+	switch (mode) {
+		case PHP_ROUND_HALF_UP:
+			if (value >= 0.0) {
+				tmp_value = floor(value + 0.5);
+			} else {
+				tmp_value= ceil(value - 0.5);
+			}
+			break;
+		case PHP_ROUND_HALF_DOWN:
+			if (value >= 0.0) {
+				tmp_value = ceil(value - 0.5);
+			} else {
+				tmp_value = floor(value + 0.5);
+			}
+			break;
+		case PHP_ROUND_CEILING:
+			tmp_value = ceil(value);
+			break;
+		case PHP_ROUND_FLOOR:
+			tmp_value = floor(value);
+			break;
+		case PHP_ROUND_TOWARD_ZERO:
+			if(value >= 0.0) {
+				tmp_value = floor(value);
+			} else {
+				tmp_value = ceil(value);
+			}
+			break;
+		case PHP_ROUND_AWAY_FROM_ZERO:
+			if(value >= 0.0) {
+				tmp_value = ceil(value);
+			} else {
+				tmp_value = floor(value);
+			}
+			break;
+		case PHP_ROUND_HALF_EVEN:
+			tmp_value = floor(value + 0.5);
+			if (tmp_value == value + 0.5 && value == (0.5 + 2 * floor(tmp_value/2.0))) {
+				tmp_value = tmp_value - 1.0;
+			}
+			break;
+		case PHP_ROUND_HALF_ODD:
+			tmp_value = floor(value + 0.5);
+			if (tmp_value == value + 0.5 && value == (0.5 + 2 * floor(tmp_value/2.0) - 1.0)) {
+				tmp_value = tmp_value - 1.0;
+			}
+			break;
+		default:
+			ZEND_ASSERT(0 && "Unexpected type");
 	}
-
 	return tmp_value;
 }
 /* }}} */
diff --git a/ext/standard/php_math.h b/ext/standard/php_math.h
index 1cdba0fe9d0a6..6ff895cce3c8d 100644
--- a/ext/standard/php_math.h
+++ b/ext/standard/php_math.h
@@ -103,7 +103,7 @@ PHPAPI zend_string * _php_math_zvaltobase(zval *arg, int base);
 #endif
 
 #ifndef PHP_ROUND_HALF_DOWN
-#define PHP_ROUND_HALF_DOWN      0x02    /* Down == towards zero */
+#define PHP_ROUND_HALF_DOWN      0x02    /* Arithmetic rounding, down == towards zero */
 #endif
 
 #ifndef PHP_ROUND_HALF_EVEN
@@ -114,4 +114,20 @@ PHPAPI zend_string * _php_math_zvaltobase(zval *arg, int base);
 #define PHP_ROUND_HALF_ODD       0x04
 #endif
 
+#ifndef PHP_ROUND_CEILING
+#define PHP_ROUND_CEILING        0x05
+#endif
+
+#ifndef PHP_ROUND_FLOOR
+#define PHP_ROUND_FLOOR          0x06
+#endif
+
+#ifndef PHP_ROUND_TOWARD_ZERO
+#define PHP_ROUND_TOWARD_ZERO    0x07
+#endif
+
+#ifndef PHP_ROUND_AWAY_FROM_ZERO
+#define PHP_ROUND_AWAY_FROM_ZERO 0x08
+#endif
+
 #endif /* PHP_MATH_H */
diff --git a/ext/standard/tests/math/round_modes.phpt b/ext/standard/tests/math/round_modes.phpt
index 23a0224efbca6..5c125473f8292 100644
--- a/ext/standard/tests/math/round_modes.phpt
+++ b/ext/standard/tests/math/round_modes.phpt
@@ -7,6 +7,10 @@ $modes = [
     "PHP_ROUND_HALF_DOWN" => PHP_ROUND_HALF_DOWN,
     "PHP_ROUND_HALF_EVEN" => PHP_ROUND_HALF_EVEN,
     "PHP_ROUND_HALF_ODD" => PHP_ROUND_HALF_ODD,
+    "PHP_ROUND_CEILING" => PHP_ROUND_CEILING,
+    "PHP_ROUND_FLOOR" => PHP_ROUND_FLOOR,
+    "PHP_ROUND_TOWARD_ZERO" => PHP_ROUND_TOWARD_ZERO,
+    "PHP_ROUND_AWAY_FROM_ZERO" => PHP_ROUND_AWAY_FROM_ZERO,
 ];
 
 $numbers = [
@@ -285,3 +289,247 @@ mode: PHP_ROUND_HALF_ODD
 		-1.9999 => -1.9999
 		 0.0001 => 0.0001
 		-0.0001 => -0.0001
+
+mode: PHP_ROUND_CEILING
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001
+
+mode: PHP_ROUND_FLOOR
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001
+
+mode: PHP_ROUND_TOWARD_ZERO
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001
+
+mode: PHP_ROUND_AWAY_FROM_ZERO
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001