Merge branch 'PHP-7.4' into PHP-8.0

* PHP-7.4:
  Fix #80889: amendment

Author: cmb69

ext/session/session.c

@@ -1952,12 +1952,23 @@ static int save_handler_check_session() {
 	return SUCCESS;
 }
 
+static inline void set_user_save_handler_ini(void) {
+	zend_string *ini_name, *ini_val;
+
+	ini_name = zend_string_init("session.save_handler", sizeof("session.save_handler") - 1, 0);
+	ini_val = zend_string_init("user", sizeof("user") - 1, 0);
+	PS(set_handler) = 1;
+	zend_alter_ini_entry(ini_name, ini_val, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
+	PS(set_handler) = 0;
+	zend_string_release_ex(ini_val, 0);
+	zend_string_release_ex(ini_name, 0);
+}
+
 /* {{{ Sets user-level functions */
 PHP_FUNCTION(session_set_save_handler)
 {
 	zval *args = NULL;
 	int i, num_args, argc = ZEND_NUM_ARGS();
-	zend_string *ini_name, *ini_val;
 
 	if (argc > 0 && argc <= 2) {
 		zval *obj = NULL;
@@ -2052,13 +2063,7 @@ PHP_FUNCTION(session_set_save_handler)
 		}
 
 		if (PS(session_status) != php_session_active && (!PS(mod) || PS(mod) != &ps_mod_user)) {
-			ini_name = zend_string_init("session.save_handler", sizeof("session.save_handler") - 1, 0);
-			ini_val = zend_string_init("user", sizeof("user") - 1, 0);
-			PS(set_handler) = 1;
-			zend_alter_ini_entry(ini_name, ini_val, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
-			PS(set_handler) = 0;
-			zend_string_release_ex(ini_val, 0);
-			zend_string_release_ex(ini_name, 0);
+			set_user_save_handler_ini();
 		}
 
 		RETURN_TRUE;
@@ -2090,14 +2095,8 @@ PHP_FUNCTION(session_set_save_handler)
 	/* remove shutdown function */
 	remove_user_shutdown_function("session_shutdown", sizeof("session_shutdown") - 1);
 
-	if (PS(mod) && PS(mod) != &ps_mod_user) {
-		ini_name = zend_string_init("session.save_handler", sizeof("session.save_handler") - 1, 0);
-		ini_val = zend_string_init("user", sizeof("user") - 1, 0);
-		PS(set_handler) = 1;
-		zend_alter_ini_entry(ini_name, ini_val, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
-		PS(set_handler) = 0;
-		zend_string_release_ex(ini_val, 0);
-		zend_string_release_ex(ini_name, 0);
+	if (!PS(mod) || PS(mod) != &ps_mod_user) {
+		set_user_save_handler_ini();
 	}
 
 	for (i = 0; i < argc; i++) {

ext/session/tests/bug80889a.phpt

@@ -0,0 +1,35 @@
+--TEST--
+Bug #80889 (Cannot set save handler when save_handler is invalid)
+--SKIPIF--
+<?php include('skipif.inc'); ?>
+--INI--
+session.save_handler=whatever
+--FILE--
+<?php
+$initHandler = ini_get('session.save_handler');
+session_set_save_handler(
+    function ($savePath, $sessionName) {
+        return true;
+    },
+    function () {
+        return true;
+    },
+    function ($id) {
+        return '';
+    },
+    function ($id, $data) {
+        return true;
+    },
+    function ($id) {
+        return true;
+    },
+    function ($maxlifetime) {
+        return true;
+    }
+);
+$setHandler = ini_get('session.save_handler');
+var_dump($initHandler, $setHandler);
+?>
+--EXPECT--
+string(8) "whatever"
+string(4) "user"