diff --git a/ext/snmp/snmp.c b/ext/snmp/snmp.c
index 44452369c9649..df1602ddb6de9 100644
--- a/ext/snmp/snmp.c
+++ b/ext/snmp/snmp.c
@@ -1358,7 +1358,7 @@ PHP_FUNCTION(snmp_set_oid_output_format)
 		RETURN_THROWS();
 	}
 
-	switch((int) a1) {
+	switch(a1) {
 		case NETSNMP_OID_OUTPUT_SUFFIX:
 		case NETSNMP_OID_OUTPUT_MODULE:
 		case NETSNMP_OID_OUTPUT_FULL:
@@ -1374,6 +1374,28 @@ PHP_FUNCTION(snmp_set_oid_output_format)
 }
 /* }}} */
 
+/* {{{ Set the string output format. */
+PHP_FUNCTION(snmp_set_string_output_format)
+{
+	zend_long a1;
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &a1) == FAILURE) {
+		RETURN_THROWS();
+	}
+
+	switch(a1) {
+		case NETSNMP_STRING_OUTPUT_GUESS:
+		case NETSNMP_STRING_OUTPUT_ASCII:
+		case NETSNMP_STRING_OUTPUT_HEX:
+			netsnmp_ds_set_int(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_STRING_OUTPUT_FORMAT, a1);
+			RETURN_TRUE;
+		default:
+			zend_argument_value_error(1, "must be an SNMP_STRING_OUTPUT_* constant");
+			RETURN_THROWS();
+	}
+}
+/* }}} */
+
 /* {{{ Fetch a SNMP object */
 PHP_FUNCTION(snmp2_get)
 {
@@ -2003,6 +2025,10 @@ PHP_MINIT_FUNCTION(snmp)
 	REGISTER_LONG_CONSTANT("SNMP_OID_OUTPUT_UCD",		NETSNMP_OID_OUTPUT_UCD,		CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("SNMP_OID_OUTPUT_NONE",		NETSNMP_OID_OUTPUT_NONE,	CONST_CS | CONST_PERSISTENT);
 
+	REGISTER_LONG_CONSTANT("SNMP_STRING_OUTPUT_GUESS",	NETSNMP_STRING_OUTPUT_GUESS,	CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("SNMP_STRING_OUTPUT_ASCII",	NETSNMP_STRING_OUTPUT_ASCII,	CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("SNMP_STRING_OUTPUT_HEX",	NETSNMP_STRING_OUTPUT_HEX,	CONST_CS | CONST_PERSISTENT);
+
 	REGISTER_LONG_CONSTANT("SNMP_VALUE_LIBRARY",	SNMP_VALUE_LIBRARY,	CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("SNMP_VALUE_PLAIN",	SNMP_VALUE_PLAIN,	CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("SNMP_VALUE_OBJECT",	SNMP_VALUE_OBJECT,	CONST_CS | CONST_PERSISTENT);
diff --git a/ext/snmp/snmp.stub.php b/ext/snmp/snmp.stub.php
index 25ad96d033175..ae6861006ab3d 100644
--- a/ext/snmp/snmp.stub.php
+++ b/ext/snmp/snmp.stub.php
@@ -23,6 +23,8 @@ function snmp_set_enum_print(bool $enable): bool {}
 
 function snmp_set_oid_output_format(int $format): bool {}
 
+function snmp_set_string_output_format(int $format): bool {}
+
 /** @alias snmp_set_oid_output_format */
 function snmp_set_oid_numeric_print(int $format): bool {}
 
diff --git a/ext/snmp/snmp_arginfo.h b/ext/snmp/snmp_arginfo.h
index 7a91113c50a1f..8176e5dcc44a7 100644
--- a/ext/snmp/snmp_arginfo.h
+++ b/ext/snmp/snmp_arginfo.h
@@ -48,6 +48,10 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_snmp_set_oid_numeric_print arginfo_snmp_set_oid_output_format
 
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_snmp_set_string_output_format, 0, 1, _IS_BOOL, 0)
+	ZEND_ARG_TYPE_INFO(0, format, IS_LONG, 0)
+ZEND_END_ARG_INFO()
+
 #define arginfo_snmp2_get arginfo_snmpget
 
 #define arginfo_snmp2_getnext arginfo_snmpget
@@ -171,6 +175,7 @@ ZEND_FUNCTION(snmp_get_quick_print);
 ZEND_FUNCTION(snmp_set_quick_print);
 ZEND_FUNCTION(snmp_set_enum_print);
 ZEND_FUNCTION(snmp_set_oid_output_format);
+ZEND_FUNCTION(snmp_set_string_output_format);
 ZEND_FUNCTION(snmp2_get);
 ZEND_FUNCTION(snmp2_getnext);
 ZEND_FUNCTION(snmp2_walk);
@@ -207,6 +212,7 @@ static const zend_function_entry ext_functions[] = {
 	ZEND_FE(snmp_set_enum_print, arginfo_snmp_set_enum_print)
 	ZEND_FE(snmp_set_oid_output_format, arginfo_snmp_set_oid_output_format)
 	ZEND_FALIAS(snmp_set_oid_numeric_print, snmp_set_oid_output_format, arginfo_snmp_set_oid_numeric_print)
+	ZEND_FE(snmp_set_string_output_format, arginfo_snmp_set_string_output_format)
 	ZEND_FE(snmp2_get, arginfo_snmp2_get)
 	ZEND_FE(snmp2_getnext, arginfo_snmp2_getnext)
 	ZEND_FE(snmp2_walk, arginfo_snmp2_walk)
diff --git a/ext/snmp/tests/snmp_include.inc b/ext/snmp/tests/snmp_include.inc
index b31384f7cf1e5..11dfaa76b9456 100644
--- a/ext/snmp/tests/snmp_include.inc
+++ b/ext/snmp/tests/snmp_include.inc
@@ -1,31 +1,33 @@
 <?php
 
-/*
-By default tests will try to access SNMP agent @ '127.0.0.1:161' and will use 'public' community for read
-requests and 'private' community for write requests.
-Default timeout is 1000ms and there will be one request performed.
-*/
+/**
+ * By default tests will try to access SNMP agent @ '127.0.0.1:161' 
+ * and will use 'public' community for read requests 
+ * and will use 'private' community for write requests.
+ * Default timeout is 1000ms and there will be one request performed.
+ */
 
-$hostname4 =	getenv('SNMP_HOSTNAME')		?:	'127.0.0.1';
-$hostname6 =	getenv('SNMP_HOSTNAME6')	?:	'::1';
-$port =		getenv('SNMP_PORT')		?:		'161';
-$hostname	= "$hostname4:$port";
+$hostname4      = getenv('SNMP_HOSTNAME')  ?: '127.0.0.1';
+$hostname6      = getenv('SNMP_HOSTNAME6') ?: '::1';
+$port           = getenv('SNMP_PORT')      ?: '161';
+
+$hostname       = "$hostname4:$port";
 $hostname6_port = "[$hostname6]:$port";
-$community =	getenv('SNMP_COMMUNITY')	?:	'public';
-$communityWrite = getenv('SNMP_COMMUNITY_WRITE')?:'private';
 
-$timeout = 	getenv('SNMP_TIMEOUT') ?:	-1;
-$retries = 	getenv('SNMP_RETRIES') ?:	1;
+$community      = getenv('SNMP_COMMUNITY')       ?: 'public';
+$communityWrite = getenv('SNMP_COMMUNITY_WRITE') ?: 'private';
+
+$timeout        = getenv('SNMP_TIMEOUT') ?: -1;
+$retries        = getenv('SNMP_RETRIES') ?: 1;
 
-if (stristr(PHP_OS, "FreeBSD")) {
-    $mibdir = 	getenv('SNMP_MIBDIR')	?:		"/usr/local/share/snmp/mibs";
+if (stristr(PHP_OS, 'FreeBSD')) {
+    $mibdir = getenv('SNMP_MIBDIR') ?: '/usr/local/share/snmp/mibs';
 } else {
-    $mibdir = 	getenv('SNMP_MIBDIR')	?:		"/usr/share/snmp/mibs";
+    $mibdir = getenv('SNMP_MIBDIR') ?: '/usr/share/snmp/mibs';
 }
 
-
-$user_noauth =	getenv('SNMP_USER_NOAUTH') ?:	'noAuthUser';
-$user_auth_prefix = getenv('SNMP_USER_PREFIX') ?:	'admin';
-$rwuser = 	getenv('SNMP_RWUSER') ?:		($user_auth_prefix . 'MD5AES');
-$auth_pass =	getenv('SNMP_AUTH_PASS') ?:	'test1234';
-$priv_pass =	getenv('SNMP_PRIV_PASS') ?:	'test1234';
+$user_noauth      = getenv('SNMP_USER_NOAUTH') ?: 'noAuthUser';
+$user_auth_prefix = getenv('SNMP_USER_PREFIX') ?: 'admin';
+$rwuser           = getenv('SNMP_RWUSER')      ?: ($user_auth_prefix . 'MD5AES');
+$auth_pass        = getenv('SNMP_AUTH_PASS')   ?: 'test1234';
+$priv_pass        = getenv('SNMP_PRIV_PASS')   ?: 'test1234';
diff --git a/ext/snmp/tests/snmp_set_string_output_format.phpt b/ext/snmp/tests/snmp_set_string_output_format.phpt
new file mode 100644
index 0000000000000..319acf09d6054
--- /dev/null
+++ b/ext/snmp/tests/snmp_set_string_output_format.phpt
@@ -0,0 +1,30 @@
+--TEST--
+Function snmp_set_string_output_format
+--SKIPIF--
+<?php
+require_once(__DIR__.'/skipif.inc');
+if (!function_exists('snmp_set_string_output_format')) die('skip This function is only available if using NET_SNMP');
+?>
+--FILE--
+<?php
+require_once(__DIR__.'/snmp_include.inc');
+
+echo "Checking error handling\n";
+try {
+    var_dump(snmp_set_string_output_format(123));
+} catch (\ValueError $e) {
+    echo $e->getMessage() . \PHP_EOL;
+}
+
+echo "Checking working\n";
+var_dump(snmp_set_string_output_format(SNMP_STRING_OUTPUT_GUESS));
+var_dump(snmp_set_string_output_format(SNMP_STRING_OUTPUT_ASCII));
+var_dump(snmp_set_string_output_format(SNMP_STRING_OUTPUT_HEX));
+?>
+--EXPECT--
+Checking error handling
+snmp_set_string_output_format(): Argument #1 ($format) must be an SNMP_STRING_OUTPUT_* constant
+Checking working
+bool(true)
+bool(true)
+bool(true)