Change the default error mode of mysqli

Make MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT the new mysqli
error reporting default. Explicitly call
mysqli_report(MYSQLI_REPORT_OFF) to preserve previous behavior.

RFC: https://wiki.php.net/rfc/mysqli_default_errmode

Closes phpGH-6629.

Author: kamil-tekiela

UPGRADING

@@ -75,6 +75,11 @@ PHP 8.1 UPGRADE NOTES
     internally previously.
   . The MYSQLI_STMT_ATTR_UPDATE_MAX_LENGTH option no longer has an effect.
   . The MYSQLI_STORE_RESULT_COPY_DATA option no longer has an effect.
+  . The default error handling mode has been changed from "silent" to
+    "exceptions". See https://www.php.net/manual/en/mysqli-driver.report-mode.php
+    for details of behavior changes and how to explicitly set this attribute. To
+    keep the old behavior, use mysqli_report(MYSQLI_REPORT_OFF);
+    RFC: https://wiki.php.net/rfc/mysqli_default_errmode
 
 - MySQLnd:
   . The mysqlnd.fetch_copy_data ini setting has been removed. However, this

ext/mysqli/mysqli.c

@@ -521,7 +521,7 @@ static PHP_GINIT_FUNCTION(mysqli)
 	mysqli_globals->default_pw = NULL;
 	mysqli_globals->default_socket = NULL;
 	mysqli_globals->reconnect = 0;
-	mysqli_globals->report_mode = 0;
+	mysqli_globals->report_mode = MYSQLI_REPORT_ERROR|MYSQLI_REPORT_STRICT;;
 	mysqli_globals->allow_local_infile = 0;
 	mysqli_globals->local_infile_directory = NULL;
 	mysqli_globals->rollback_on_cached_plink = FALSE;
@@ -826,7 +826,7 @@ PHP_RINIT_FUNCTION(mysqli)
 #endif
 	MyG(error_msg) = NULL;
 	MyG(error_no) = 0;
-	MyG(report_mode) = 0;
+	MyG(report_mode) = MYSQLI_REPORT_ERROR|MYSQLI_REPORT_STRICT;
 
 	return SUCCESS;
 }

ext/mysqli/tests/connect.inc

@@ -7,6 +7,7 @@
     */
 
     $driver    = new mysqli_driver;
+    $driver->report_mode = MYSQLI_REPORT_OFF;
 
     $host      = getenv("MYSQL_TEST_HOST")     ?: "127.0.0.1";
     $port      = getenv("MYSQL_TEST_PORT")     ?: 3306;

ext/mysqli/tests/mysqli_incomplete_initialization.phpt

@@ -7,6 +7,7 @@ require_once('skipif.inc');
 --FILE--
 <?php
 
+mysqli_report(MYSQLI_REPORT_OFF);
 $mysqli = new mysqli();
 @$mysqli->__construct('doesnotexist');
 $mysqli->close();