Promote warning to exception in dns_check_record() function

phpGH-5004

Author: kocsismate

ext/standard/dns.c

@@ -383,8 +383,8 @@ PHP_FUNCTION(dns_check_record)
 	ZEND_PARSE_PARAMETERS_END();
 
 	if (hostname_len == 0) {
-		php_error_docref(NULL, E_WARNING, "Host cannot be empty");
-		RETURN_FALSE;
+		zend_value_error("Host cannot be empty");
+		return;
 	}
 
 	if (rectype) {

ext/standard/dns_win32.c

@@ -107,8 +107,8 @@ PHP_FUNCTION(dns_check_record)
 	}
 
 	if (hostname_len == 0) {
-		php_error_docref(NULL, E_WARNING, "Host cannot be empty");
-		RETURN_FALSE;
+		zend_value_error("Host cannot be empty");
+		return;
 	}
 
 	if (rectype) {

ext/standard/tests/network/bug41347.phpt

@@ -2,8 +2,11 @@
 dns_check_record() segfault with empty host
 --FILE--
 <?php
-var_dump(dns_check_record(''));
+try {
+    var_dump(dns_check_record(''));
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
 ?>
---EXPECTF--
-Warning: dns_check_record(): Host cannot be empty in %s on line %d
-bool(false)
+--EXPECT--
+Host cannot be empty