diff --git a/ext/standard/basic_functions_arginfo.h b/ext/standard/basic_functions_arginfo.h
index a3d965ad9966..93a2572e1382 100644
--- a/ext/standard/basic_functions_arginfo.h
+++ b/ext/standard/basic_functions_arginfo.h
@@ -753,6 +753,7 @@ ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_setrawcookie, 0, 1, _IS_BOOL, 0)
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, domain, IS_STRING, 0, "\"\"")
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, secure, _IS_BOOL, 0, "false")
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, httponly, _IS_BOOL, 0, "false")
+	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, partitioned, _IS_BOOL, 0, "false")
 ZEND_END_ARG_INFO()
 
 #define arginfo_setcookie arginfo_setrawcookie
diff --git a/ext/standard/head.c b/ext/standard/head.c
index ccef4be16bdf..7aaabdc429c7 100644
--- a/ext/standard/head.c
+++ b/ext/standard/head.c
@@ -79,7 +79,7 @@ PHPAPI bool php_header(void)
 #define ILLEGAL_COOKIE_CHARACTER "\",\", \";\", \" \", \"\\t\", \"\\r\", \"\\n\", \"\\013\", or \"\\014\""
 PHPAPI zend_result php_setcookie(zend_string *name, zend_string *value, time_t expires,
 	zend_string *path, zend_string *domain, bool secure, bool httponly,
-	zend_string *samesite, bool url_encode)
+	zend_string *samesite, bool partitioned, bool url_encode)
 {
 	zend_string *dt;
 	sapi_header_line ctr = {0};
@@ -182,6 +182,9 @@ PHPAPI zend_result php_setcookie(zend_string *name, zend_string *value, time_t e
 		smart_str_appends(&buf, COOKIE_SAMESITE);
 		smart_str_append(&buf, samesite);
 	}
+	if (partitioned) {
+		smart_str_appends(&buf, COOKIE_PARTITIONED);
+	}
 
 	ctr.line = ZSTR_VAL(buf.s);
 	ctr.line_len = (uint32_t) ZSTR_LEN(buf.s);
@@ -192,7 +195,7 @@ PHPAPI zend_result php_setcookie(zend_string *name, zend_string *value, time_t e
 }
 
 static zend_result php_head_parse_cookie_options_array(HashTable *options, zend_long *expires, zend_string **path,
-		zend_string **domain, bool *secure, bool *httponly, zend_string **samesite)
+		zend_string **domain, bool *secure, bool *httponly, zend_string **samesite, bool *partitioned)
 {
 	zend_string *key;
 	zval *value;
@@ -212,6 +215,8 @@ static zend_result php_head_parse_cookie_options_array(HashTable *options, zend_
 			*secure = zval_is_true(value);
 		} else if (zend_string_equals_literal_ci(key, "httponly")) {
 			*httponly = zval_is_true(value);
+		} else if (zend_string_equals_literal_ci(key, "partitioned")) {
+			*partitioned = zval_is_true(value);
 		} else if (zend_string_equals_literal_ci(key, "samesite")) {
 			*samesite = zval_get_string(value);
 		} else {
@@ -227,9 +232,9 @@ static void php_setcookie_common(INTERNAL_FUNCTION_PARAMETERS, bool is_raw)
 	HashTable *options = NULL;
 	zend_long expires = 0;
 	zend_string *name, *value = NULL, *path = NULL, *domain = NULL, *samesite = NULL;
-	bool secure = 0, httponly = 0;
+	bool secure = 0, httponly = 0, partitioned = 0;
 
-	ZEND_PARSE_PARAMETERS_START(1, 7)
+	ZEND_PARSE_PARAMETERS_START(1, 8)
 		Z_PARAM_STR(name)
 		Z_PARAM_OPTIONAL
 		Z_PARAM_STR(value)
@@ -238,6 +243,7 @@ static void php_setcookie_common(INTERNAL_FUNCTION_PARAMETERS, bool is_raw)
 		Z_PARAM_STR(domain)
 		Z_PARAM_BOOL(secure)
 		Z_PARAM_BOOL(httponly)
+		Z_PARAM_BOOL(partitioned)
 	ZEND_PARSE_PARAMETERS_END();
 
 	if (options) {
@@ -248,13 +254,13 @@ static void php_setcookie_common(INTERNAL_FUNCTION_PARAMETERS, bool is_raw)
 		}
 
 		if (FAILURE == php_head_parse_cookie_options_array(options, &expires, &path,
-			&domain, &secure, &httponly, &samesite)
+			&domain, &secure, &httponly, &samesite, &partitioned)
 		) {
 			goto cleanup;
 		}
 	}
 
-	if (php_setcookie(name, value, expires, path, domain, secure, httponly, samesite, !is_raw) == SUCCESS) {
+	if (php_setcookie(name, value, expires, path, domain, secure, httponly, samesite, partitioned, !is_raw) == SUCCESS) {
 		RETVAL_TRUE;
 	} else {
 		RETVAL_FALSE;
diff --git a/ext/standard/head.h b/ext/standard/head.h
index 32c2570a5325..0eef6ffe0d1e 100644
--- a/ext/standard/head.h
+++ b/ext/standard/head.h
@@ -24,12 +24,13 @@
 #define COOKIE_SECURE     "; secure"
 #define COOKIE_HTTPONLY   "; HttpOnly"
 #define COOKIE_SAMESITE   "; SameSite="
+#define COOKIE_PARTITIONED   "; Partitioned"
 
 extern PHP_RINIT_FUNCTION(head);
 
 PHPAPI bool php_header(void);
 PHPAPI zend_result php_setcookie(zend_string *name, zend_string *value, time_t expires,
 	zend_string *path, zend_string *domain, bool secure, bool httponly,
-	zend_string *samesite, bool url_encode);
+	zend_string *samesite, bool url_encode, bool partitioned);
 
 #endif
diff --git a/ext/standard/tests/network/setcookie.phpt b/ext/standard/tests/network/setcookie.phpt
index f43680a5bcea..8d7a44be4e79 100644
--- a/ext/standard/tests/network/setcookie.phpt
+++ b/ext/standard/tests/network/setcookie.phpt
@@ -16,10 +16,13 @@ setcookie('name', 'value', 0, '/path/');
 setcookie('name', 'value', 0, '', 'domain.tld');
 setcookie('name', 'value', 0, '', '', TRUE);
 setcookie('name', 'value', 0, '', '', FALSE, TRUE);
+setcookie('name', 'value', 0, '', '', FALSE, FALSE, TRUE);
 
 setcookie('name', 'value', ['expires' => $tsp]);
 setcookie('name', 'value', ['expires' => $tsn, 'path' => '/path/', 'domain' => 'domain.tld', 'secure' => true, 'httponly' => true, 'samesite' => 'Strict']);
 
+setcookie('name', 'value', ['partitioned' => 1]);
+
 $expected = array(
     'Set-Cookie: name=deleted; expires='.date('D, d M Y H:i:s', 1).' GMT; Max-Age=0',
     'Set-Cookie: name=deleted; expires='.date('D, d M Y H:i:s', 1).' GMT; Max-Age=0',
@@ -33,8 +36,10 @@ $expected = array(
     'Set-Cookie: name=value; domain=domain.tld',
     'Set-Cookie: name=value; secure',
     'Set-Cookie: name=value; HttpOnly',
+    'Set-Cookie: name=value; Partitioned',
     'Set-Cookie: name=value; expires='.date('D, d M Y H:i:s', $tsp).' GMT; Max-Age=5',
-    'Set-Cookie: name=value; expires='.date('D, d M Y H:i:s', $tsn).' GMT; Max-Age=0; path=/path/; domain=domain.tld; secure; HttpOnly; SameSite=Strict'
+    'Set-Cookie: name=value; expires='.date('D, d M Y H:i:s', $tsn).' GMT; Max-Age=0; path=/path/; domain=domain.tld; secure; HttpOnly; SameSite=Strict',
+    'Set-Cookie: name=value; Partitioned',
 );
 
 $headers = headers_list();