diff --git a/ext/soap/soap.c b/ext/soap/soap.c
index 527753bd1b503..e503a0ecbd6bf 100644
--- a/ext/soap/soap.c
+++ b/ext/soap/soap.c
@@ -149,9 +149,9 @@ static void soap_error_handler(int error_num, const char *error_filename, const
 		if ((tmp = zend_hash_str_find(Z_OBJPROP_P(ZEND_THIS),"service", sizeof("service")-1)) != NULL) { \
 			ss = (soapServicePtr)zend_fetch_resource_ex(tmp, "service", le_service); \
 		} else { \
-	                php_error_docref(NULL, E_WARNING, "Can not fetch service object"); \
+			zend_throw_error(NULL, "Cannot fetch SoapServer object"); \
 			SOAP_SERVER_END_CODE(); \
-			return; \
+			RETURN_THROWS(); \
 		} \
 	}
 
@@ -525,9 +525,10 @@ PHP_METHOD(SoapParam, __construct)
 	if (zend_parse_parameters(ZEND_NUM_ARGS(), "zs", &data, &name, &name_length) == FAILURE) {
 		RETURN_THROWS();
 	}
+
 	if (name_length == 0) {
-		php_error_docref(NULL, E_WARNING, "Invalid parameter name");
-		return;
+		zend_argument_value_error(2, "cannot be empty");
+		RETURN_THROWS();
 	}
 
 	this_ptr = ZEND_THIS;
@@ -559,12 +560,12 @@ PHP_METHOD(SoapHeader, __construct)
 	ZEND_PARSE_PARAMETERS_END();
 
 	if (ns_len == 0) {
-		php_error_docref(NULL, E_WARNING, "Invalid namespace");
-		return;
+		zend_argument_value_error(1, "cannot be empty");
+		RETURN_THROWS();
 	}
 	if (name_len == 0) {
-		php_error_docref(NULL, E_WARNING, "Invalid header name");
-		return;
+		zend_argument_value_error(2, "cannot be empty");
+		RETURN_THROWS();
 	}
 
 	this_ptr = ZEND_THIS;
@@ -579,13 +580,15 @@ PHP_METHOD(SoapHeader, __construct)
 		if (ZSTR_LEN(actor_str) > 2) {
 			add_property_stringl(this_ptr, "actor", ZSTR_VAL(actor_str), ZSTR_LEN(actor_str));
 		} else {
-			php_error_docref(NULL, E_WARNING, "Invalid actor");
+			zend_argument_value_error(2, "must be longer than 2 characters");
+			RETURN_THROWS();
 		}
 	} else if (!actor_is_null) {
 		if ((actor_long == SOAP_ACTOR_NEXT || actor_long == SOAP_ACTOR_NONE || actor_long == SOAP_ACTOR_UNLIMATERECEIVER)) {
 			add_property_long(this_ptr, "actor", actor_long);
 		} else {
-			php_error_docref(NULL, E_WARNING, "Invalid actor");
+			zend_argument_value_error(5, "must be either SOAP_ACTOR_NEXT, SOAP_ACTOR_NONE or SOAP_ACTOR_UNLIMATERECEIVER");
+			RETURN_THROWS();
 		}
 	}
 }
@@ -624,9 +627,10 @@ PHP_METHOD(SoapFault, __construct)
 	}
 
 	if ((code_str || code_ht) && (fault_code == NULL || fault_code_len == 0)) {
-		php_error_docref(NULL, E_WARNING, "Invalid fault code");
-		return;
+		zend_argument_value_error(1, "is not a valid fault code");
+		RETURN_THROWS();
 	}
+
 	if (name != NULL && name_len == 0) {
 		name = NULL;
 	}
@@ -700,8 +704,8 @@ PHP_METHOD(SoapVar, __construct)
 		if (zend_hash_index_exists(&SOAP_GLOBAL(defEncIndex), type)) {
 			add_property_long(this_ptr, "enc_type", type);
 		} else {
-			php_error_docref(NULL, E_WARNING, "Invalid type ID");
-			return;
+			zend_argument_value_error(2, "is not a valid encoding");
+			RETURN_THROWS();
 		}
 	}
 
@@ -739,7 +743,7 @@ static HashTable* soap_create_typemap(sdlPtr sdl, HashTable *ht) /* {{{ */
 		zend_string *name;
 
 		if (Z_TYPE_P(tmp) != IS_ARRAY) {
-			php_error_docref(NULL, E_WARNING, "Wrong 'typemap' option");
+			zend_type_error("SoapHeader::__construct(): \"typemap\" option must be of type array, %s given", zend_zval_type_name(tmp));
 			return NULL;
 		}
 		ht2 = Z_ARRVAL_P(tmp);
@@ -971,12 +975,14 @@ PHP_METHOD(SoapServer, setPersistence)
 			value == SOAP_PERSISTENCE_REQUEST) {
 			service->soap_class.persistence = value;
 		} else {
-			php_error_docref(NULL, E_WARNING, "Tried to set persistence with bogus value (" ZEND_LONG_FMT ")", value);
-			return;
+			zend_argument_value_error(
+				1, "must be either SOAP_PERSISTENCE_SESSION or SOAP_PERSISTENCE_REQUEST when the SOAP server is used in class mode"
+			);
+			RETURN_THROWS();
 		}
 	} else {
-		php_error_docref(NULL, E_WARNING, "Tried to set persistence when you are using you SOAP SERVER in function mode, no persistence needed");
-		return;
+		zend_throw_error(NULL, "SoapServer::setPersistence(): Persistence cannot be set when the SOAP server is used in function mode");
+		RETURN_THROWS();
 	}
 
 	SOAP_SERVER_END_CODE();
@@ -988,12 +994,11 @@ PHP_METHOD(SoapServer, setPersistence)
 PHP_METHOD(SoapServer, setClass)
 {
 	soapServicePtr service;
-	zend_string *classname;
-	zend_class_entry *ce;
+	zend_class_entry *ce = NULL;
 	int num_args = 0;
 	zval *argv = NULL;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "S*", &classname, &argv, &num_args) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "C*", &ce, &argv, &num_args) == FAILURE) {
 		RETURN_THROWS();
 	}
 
@@ -1001,24 +1006,17 @@ PHP_METHOD(SoapServer, setClass)
 
 	FETCH_THIS_SERVICE(service);
 
-	ce = zend_lookup_class(classname);
-
-	if (ce) {
-		service->type = SOAP_CLASS;
-		service->soap_class.ce = ce;
+	service->type = SOAP_CLASS;
+	service->soap_class.ce = ce;
 
-		service->soap_class.persistence = SOAP_PERSISTENCE_REQUEST;
-		service->soap_class.argc = num_args;
-		if (service->soap_class.argc > 0) {
-			int i;
-			service->soap_class.argv = safe_emalloc(sizeof(zval), service->soap_class.argc, 0);
-			for (i = 0;i < service->soap_class.argc;i++) {
-				ZVAL_COPY(&service->soap_class.argv[i], &argv[i]);
-			}
+	service->soap_class.persistence = SOAP_PERSISTENCE_REQUEST;
+	service->soap_class.argc = num_args;
+	if (service->soap_class.argc > 0) {
+		int i;
+		service->soap_class.argv = safe_emalloc(sizeof(zval), service->soap_class.argc, 0);
+		for (i = 0;i < service->soap_class.argc;i++) {
+			ZVAL_COPY(&service->soap_class.argv[i], &argv[i]);
 		}
-	} else {
-		php_error_docref(NULL, E_WARNING, "Tried to set a non existent class (%s)", ZSTR_VAL(classname));
-		return;
 	}
 
 	SOAP_SERVER_END_CODE();
@@ -1122,14 +1120,15 @@ PHP_METHOD(SoapServer, addFunction)
 				zend_function *f;
 
 				if (Z_TYPE_P(tmp_function) != IS_STRING) {
-					php_error_docref(NULL, E_WARNING, "Tried to add a function that isn't a string");
-					return;
+					zend_argument_type_error(1, "must contain only strings");
+					RETURN_THROWS();
 				}
 
 				key = zend_string_tolower(Z_STR_P(tmp_function));
 
 				if ((f = zend_hash_find_ptr(EG(function_table), key)) == NULL) {
-					php_error_docref(NULL, E_WARNING, "Tried to add a non existent function '%s'", Z_STRVAL_P(tmp_function));
+					zend_type_error("SoapServer::addFunction(): Function \"%s\" not found", Z_STRVAL_P(tmp_function));
+					RETURN_THROWS();
 					return;
 				}
 
@@ -1146,8 +1145,8 @@ PHP_METHOD(SoapServer, addFunction)
 		key = zend_string_tolower(Z_STR_P(function_name));
 
 		if ((f = zend_hash_find_ptr(EG(function_table), key)) == NULL) {
-			php_error_docref(NULL, E_WARNING, "Tried to add a non existent function '%s'", Z_STRVAL_P(function_name));
-			return;
+			zend_argument_type_error(1, "must be a valid function name, function \"%s\" not found", Z_STRVAL_P(function_name));
+			RETURN_THROWS();
 		}
 		if (service->soap_functions.ft == NULL) {
 			service->soap_functions.functions_all = FALSE;
@@ -1166,9 +1165,12 @@ PHP_METHOD(SoapServer, addFunction)
 			}
 			service->soap_functions.functions_all = TRUE;
 		} else {
-			php_error_docref(NULL, E_WARNING, "Invalid value passed");
-			return;
+			zend_argument_value_error(1, "must be SOAP_FUNCTIONS_ALL when an integer is passed");
+			RETURN_THROWS();
 		}
+	} else {
+		zend_argument_type_error(1, "must be of type array|string|int, %s given", zend_zval_type_name(function_name));
+		RETURN_THROWS();
 	}
 
 	SOAP_SERVER_END_CODE();
@@ -1217,7 +1219,7 @@ PHP_METHOD(SoapServer, handle)
 	int old_features;
 	zval tmp_soap;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s", &arg, &arg_len) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s!", &arg, &arg_len) == FAILURE) {
 		RETURN_THROWS();
 	}
 
@@ -1226,7 +1228,7 @@ PHP_METHOD(SoapServer, handle)
 	FETCH_THIS_SERVICE(service);
 	SOAP_GLOBAL(soap_version) = service->version;
 
-	if (ZEND_NUM_ARGS() > 0 && ZEND_SIZE_T_INT_OVFL(arg_len)) {
+	if (arg && ZEND_SIZE_T_INT_OVFL(arg_len)) {
 		soap_server_fault("Server", "Input string is too long", NULL, NULL, NULL);
 		return;
 	}
@@ -1281,7 +1283,7 @@ PHP_METHOD(SoapServer, handle)
 		php_error_docref(NULL, E_ERROR,"ob_start failed");
 	}
 
-	if (ZEND_NUM_ARGS() == 0) {
+	if (!arg) {
 		if (SG(request_info).request_body && 0 == php_stream_rewind(SG(request_info).request_body)) {
 			zval *server_vars, *encoding;
 			php_stream_filter *zf = NULL;
@@ -1741,8 +1743,8 @@ PHP_METHOD(SoapServer, addSoapHeader)
 	FETCH_THIS_SERVICE(service);
 
 	if (!service || !service->soap_headers_ptr) {
-		php_error_docref(NULL, E_WARNING, "The SoapServer::addSoapHeader function may be called only during SOAP request processing");
-		return;
+		zend_throw_error(NULL, "SoapServer::addSoapHeader() may be called only during SOAP request processing");
+		RETURN_THROWS();
 	}
 
 	p = service->soap_headers_ptr;
@@ -2567,9 +2569,9 @@ void soap_client_call_impl(INTERNAL_FUNCTION_PARAMETERS, zend_bool is_soap_call)
 		zend_hash_next_index_insert(soap_headers, headers);
 		Z_ADDREF_P(headers);
 		free_soap_headers = 1;
-	} else{
-		php_error_docref(NULL, E_WARNING, "Invalid SOAP header");
-		return;
+	} else {
+		zend_argument_type_error(4, "must be of type SoapHeader|array|null, %s given", zend_zval_type_name(headers));
+		RETURN_THROWS();
 	}
 
 	/* Add default headers */
@@ -2875,8 +2877,9 @@ PHP_METHOD(SoapClient, __setSoapHeaders)
 		add_next_index_zval(&default_headers, headers);
 		add_property_zval(this_ptr, "__default_headers", &default_headers);
 		Z_DELREF_P(&default_headers);
-	} else{
-		php_error_docref(NULL, E_WARNING, "Invalid SOAP header");
+	} else {
+		zend_argument_type_error(1, "must be of type SoapHeader|array|null, %s given", zend_zval_type_name(headers));
+		RETURN_THROWS();
 	}
 	RETURN_TRUE;
 }
diff --git a/ext/soap/soap.stub.php b/ext/soap/soap.stub.php
index 44f2b01135221..acbbe2a6fa19a 100644
--- a/ext/soap/soap.stub.php
+++ b/ext/soap/soap.stub.php
@@ -57,7 +57,7 @@ public function getFunctions() {}
     public function addFunction($functions) {}
 
     /** @return void */
-    public function handle(string $soap_request = UNKNOWN) {}
+    public function handle(?string $soap_request = null) {}
 }
 
 class SoapClient
diff --git a/ext/soap/soap_arginfo.h b/ext/soap/soap_arginfo.h
index 49162a5d0e232..03b559d4fcb18 100644
--- a/ext/soap/soap_arginfo.h
+++ b/ext/soap/soap_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 75e1f968f03aacc08ad7858adff05040ed61e23d */
+ * Stub hash: b33d57ddba20c64739d51bfba39f2557026939cd */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_use_soap_error_handler, 0, 0, _IS_BOOL, 0)
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, handler, _IS_BOOL, 0, "true")
@@ -81,7 +81,7 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_class_SoapServer_addFunction, 0, 0, 1)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_SoapServer_handle, 0, 0, 0)
-	ZEND_ARG_TYPE_INFO(0, soap_request, IS_STRING, 0)
+	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, soap_request, IS_STRING, 1, "null")
 ZEND_END_ARG_INFO()
 
 #define arginfo_class_SoapClient___construct arginfo_class_SoapServer___construct
diff --git a/ext/soap/tests/bugs/bug31755.phpt b/ext/soap/tests/bugs/bug31755.phpt
index d3c7ea8984c1b..aff600e39ae70 100644
--- a/ext/soap/tests/bugs/bug31755.phpt
+++ b/ext/soap/tests/bugs/bug31755.phpt
@@ -7,13 +7,18 @@ Bug #31422 (No Error-Logging on SoapServer-Side)
 $client=new SOAPClient(null, array('location' => 'http://localhost',
 'uri' => 'myNS', 'exceptions' => false, 'trace' => true));
 
-$header = new SOAPHeader(null, 'foo', 'bar');
+try {
+    new SOAPHeader('', 'foo', 'bar');
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
 
+$header = new SOAPHeader('namespace', 'foo', 'bar');
 $response= $client->__soapCall('function', array(), null, $header);
 
 print $client->__getLastRequest();
 ?>
---EXPECTF--
-Warning: SoapHeader::__construct(): Invalid namespace in %s on line %d
+--EXPECT--
+SoapHeader::__construct(): Argument #1 ($namespace) cannot be empty
 <?xml version="1.0" encoding="UTF-8"?>
-<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="myNS" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Header/><SOAP-ENV:Body><ns1:function/></SOAP-ENV:Body></SOAP-ENV:Envelope>
+<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="myNS" xmlns:ns2="namespace" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Header><ns2:foo>bar</ns2:foo></SOAP-ENV:Header><SOAP-ENV:Body><ns1:function/></SOAP-ENV:Body></SOAP-ENV:Envelope>
diff --git a/ext/soap/tests/fault_warning.phpt b/ext/soap/tests/fault_warning.phpt
index e43b1d83593f4..77b5154b9a5e9 100644
--- a/ext/soap/tests/fault_warning.phpt
+++ b/ext/soap/tests/fault_warning.phpt
@@ -4,7 +4,12 @@ SoapFault class: Invalid Fault code warning given? Can't be an empty string, an
 <?php require_once('skipif.inc'); ?>
 --FILE--
 <?php
-$fault = new SoapFault("", "message"); // Can't be an empty string
+
+try {
+    new SoapFault("", "message"); // Can't be an empty string
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
 
 try {
     new SoapFault(new stdClass(), "message");  // Can't be a non-string (except for null)
@@ -16,18 +21,28 @@ $fault = new SoapFault("Sender", "message");
 echo get_class($fault) . "\n";
 $fault = new SoapFault(null, "message");
 echo get_class($fault) . "\n";
-$fault = new SoapFault(["more"], "message");  // two elements in array required
-$fault = new SoapFault(["m", "more", "superfluous"], "message"); // two required
+
+try {
+    new SoapFault(["more"], "message");  // two elements in array required
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
+
+try {
+    new SoapFault(["m", "more", "superfluous"], "message"); // two required
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
+
 $fault = new SoapFault(["more-ns", "Sender"], "message");  // two given
 echo get_class($fault);
+
 ?>
---EXPECTF--
-Warning: SoapFault::__construct(): Invalid fault code in %s on line %d
+--EXPECT--
+SoapFault::__construct(): Argument #1 ($faultcode) is not a valid fault code
 SoapFault::__construct(): Argument #1 ($faultcode) must be of type string|array|null, stdClass given
 SoapFault
 SoapFault
-
-Warning: SoapFault::__construct(): Invalid fault code in %s on line %d
-
-Warning: SoapFault::__construct(): Invalid fault code in %s on line %d
+SoapFault::__construct(): Argument #1 ($faultcode) is not a valid fault code
+SoapFault::__construct(): Argument #1 ($faultcode) is not a valid fault code
 SoapFault
diff --git a/ext/xmlwriter/php_xmlwriter.c b/ext/xmlwriter/php_xmlwriter.c
index a6740729bb739..3dfaab97ee2a6 100644
--- a/ext/xmlwriter/php_xmlwriter.c
+++ b/ext/xmlwriter/php_xmlwriter.c
@@ -896,8 +896,8 @@ PHP_FUNCTION(xmlwriter_open_uri)
 	}
 
 	if (source_len == 0) {
-		php_error_docref(NULL, E_WARNING, "Empty string as source");
-		RETURN_FALSE;
+		zend_argument_value_error(1, "cannot be empty");
+		RETURN_THROWS();
 	}
 
 	valid_file = _xmlwriter_get_valid_file_path(source, resolved_path, MAXPATHLEN);
diff --git a/ext/xmlwriter/tests/xmlwriter_open_uri_error_001.phpt b/ext/xmlwriter/tests/xmlwriter_open_uri_error_001.phpt
index 64d93a19c265f..a3af772d8934d 100644
--- a/ext/xmlwriter/tests/xmlwriter_open_uri_error_001.phpt
+++ b/ext/xmlwriter/tests/xmlwriter_open_uri_error_001.phpt
@@ -4,12 +4,15 @@ xmlwriter_open_uri with empty string as parameter
 <?php if (!extension_loaded("xmlwriter")) print "skip"; ?>
 --FILE--
 <?php
-var_dump(xmlwriter_open_uri(''));
+try {
+    xmlwriter_open_uri('');
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
 ?>
 --CREDITS--
 Koen Kuipers koenk82@gmail.com
 Theo van der Zee
 #Test Fest Utrecht 09-05-2009
---EXPECTF--
-Warning: xmlwriter_open_uri(): Empty string as source in %s on line %d
-bool(false)
+--EXPECT--
+xmlwriter_open_uri(): Argument #1 ($uri) cannot be empty