Merge branch 'PHP-8.3' into PHP-8.4

* PHP-8.3:
  Squashed commit of the following:

Author: kamil-tekiela

NEWS

@@ -8,7 +8,7 @@ PHP                                                                        NEWS
 
 - Bz2:
   . Fixed bug GH-20620 (bzcompress overflow on large source size).
-    (David Carlier)  
+    (David Carlier)
 
 - GD:
   . Fixed bug GH-20622 (imagestring/imagestringup overflow). (David Carlier)
@@ -22,7 +22,7 @@ PHP                                                                        NEWS
 
 - Standard:
   . Fix error check for proc_open() command. (ndossche)
- 
+
 18 Dec 2025, PHP 8.4.16
 
 - Core:
@@ -74,6 +74,9 @@ PHP                                                                        NEWS
   . Fixed bug GH-20492 (mbstring compile warning due to non-strings).
     (ndossche)
 
+- mysqli:
+  . Make mysqli_begin_transaction() report errors properly. (Kamil Tekiela)
+
 - MySQLnd:
   . Fixed bug GH-20528 (Regression breaks mysql connexion using an IPv6 address
     enclosed in square brackets). (Remi)

ext/mysqli/mysqli_nonapi.c

@@ -1018,6 +1018,7 @@ PHP_FUNCTION(mysqli_begin_transaction)
 	}
 
 	if (FAIL == mysqlnd_begin_transaction(mysql->mysql, flags, name)) {
+		MYSQLI_REPORT_MYSQL_ERROR(mysql->mysql);
 		RETURN_FALSE;
 	}
 	RETURN_TRUE;
@@ -1042,6 +1043,7 @@ PHP_FUNCTION(mysqli_savepoint)
 	}
 
 	if (FAIL == mysqlnd_savepoint(mysql->mysql, name)) {
+		MYSQLI_REPORT_MYSQL_ERROR(mysql->mysql);
 		RETURN_FALSE;
 	}
 	RETURN_TRUE;
@@ -1065,6 +1067,7 @@ PHP_FUNCTION(mysqli_release_savepoint)
 		RETURN_THROWS();
 	}
 	if (FAIL == mysqlnd_release_savepoint(mysql->mysql, name)) {
+		MYSQLI_REPORT_MYSQL_ERROR(mysql->mysql);
 		RETURN_FALSE;
 	}
 	RETURN_TRUE;

ext/mysqli/tests/mysqli_begin_transaction_error.phpt

@@ -0,0 +1,42 @@
+--TEST--
+mysqli_begin_transaction()
+--EXTENSIONS--
+mysqli
+--SKIPIF--
+<?php
+require_once 'skipifconnectfailure.inc';
+
+require_once 'connect.inc';
+if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
+    die(sprintf("skip Cannot connect, [%d] %s", mysqli_connect_errno(), mysqli_connect_error()));
+
+if (!have_innodb($link))
+    die(sprintf("skip Needs InnoDB support, [%d] %s", $link->errno, $link->error));
+?>
+--FILE--
+<?php
+require_once 'connect.inc';
+
+mysqli_report(MYSQLI_REPORT_ALL & ~MYSQLI_REPORT_INDEX);
+$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket);
+try {
+    mysqli_query($link, sprintf('KILL %d', mysqli_thread_id($link)));
+} catch (mysqli_sql_exception) {
+    // ignore
+}
+
+try {
+    mysqli_begin_transaction($link);
+} catch (mysqli_sql_exception $e) {
+    echo "Expecting an exception.\n";
+}
+
+echo "done!\n";
+?>
+--CLEAN--
+<?php
+    require_once 'clean_table.inc';
+?>
+--EXPECT--
+Expecting an exception.
+done!