Add Pdo\Pgsql::setNoticeCallback() (#14299)

This moves the new method from magically being added to the PDO class from the driver to just be available on the dedicated subclass. 

Drive-by fixes to NEWS and UPGRADING

NEWS

@@ -170,32 +170,32 @@ PHP                                                                        NEWS
 
 - PDO_DBLIB:
   . Fixed setAttribute and getAttribute. (SakiTakamachi)
-  . Added class PdoDbLib. (danack, kocsismate)
+  . Added class Pdo\DbLib. (danack, kocsismate)
 
 - PDO_FIREBIRD:
   . Fixed setAttribute and getAttribute. (SakiTakamachi)
   . Feature: Add transaction isolation level and mode settings to pdo_firebird.
     (SakiTakamachi)
-  . Added class PdoFirebird. (danack, kocsismate)
+  . Added class Pdo\Firebird. (danack, kocsismate)
 
 - PDO_MYSQL:
   . Fixed setAttribute and getAttribute. (SakiTakamachi)
-  . Added class PdoMysql. (danack, kocsismate)
+  . Added class Pdo\Mysql. (danack, kocsismate)
 
 - PDO_ODBC:
-  . Added class PdoOdbc. (danack, kocsismate)
+  . Added class Pdo\Odbc. (danack, kocsismate)
 
 - PDO_PGSQL:
   . Fixed GH-12423, DSN credentials being prioritized over the user/password
     PDO constructor arguments. (SakiTakamachi)
   . Fixed native float support with pdo_pgsql query results. (Yurunsoft)
-  . Added class PdoPgsql. (danack, kocsismate)
+  . Added class Pdo\Pgsql. (danack, kocsismate)
   . Retrieve the memory usage of the query result resource. (KentarouTakeda)
-  . Added PDO::pgsqlSetNoticeCallBack method to receive DB notices.
+  . Added Pdo\Pgsql::setNoticeCallBack method to receive DB notices.
     (outtersg) 
 
 - PDO_SQLITE:
-  . Added class PdoSqlite. (danack, kocsismate)
+  . Added class Pdo\Sqlite. (danack, kocsismate)
   . Fixed bug #81227 (PDO::inTransaction reports false when in transaction).
     (nielsdos)
 

UPGRADING

@@ -263,22 +263,22 @@ PHP 8.4 UPGRADE NOTES
     or by invoking their constructor directly.
 
 - PDO_DBLIB:
-  . Added class PdoDbLib.
+  . Added class Pdo\DbLib.
 
 - PDO_FIREBIRD:
-  . Added class PdoFirebird.
+  . Added class Pdo\Firebird.
 
 - PDO_MYSQL:
-  . Added class PdoMysql.
+  . Added class Pdo\Mysql.
 
 - PDO_ODBC:
-  . Added class PdoOdbc.
+  . Added class Pdo\Odbc.
 
 - PDO_PGSQL:
-  . Added class PdoPgsql.
+  . Added class Pdo\Pgsql.
 
 - PDO_SQLITE:
-  . Added class PdoSqlite.
+  . Added class Pdo\Sqlite.
 
 - POSIX:
   . Added constant POSIX_SC_CHILD_MAX
@@ -546,7 +546,7 @@ PHP 8.4 UPGRADE NOTES
     energy consumption) of the current process and pcntl_setqos_class to set it.
 
 - PDO_PGSQL:
-  . Added PDO::pgsqlSetNoticeCallback to allow a callback to be triggered on
+  . Added Pdo\Pgsql::setNoticeCallback() to allow a callback to be triggered on
     every notice sent (e.g. RAISE NOTICE).
 
 - PGSQL:

ext/pdo/php_pdo.h

@@ -55,11 +55,24 @@ PHP_MINFO_FUNCTION(pdo);
 
 #define LONG_CONST(c) (zend_long) c
 
+#define PDO_CONSTRUCT_CHECK_COND dbh->driver
+#define PDO_CONSTRUCT_CHECK_FAIL() \
+		{ \
+			zend_throw_error(NULL, "%s object is uninitialized", ZSTR_VAL(Z_OBJ(EX(This))->ce->name)); \
+		} \
+
 #define PDO_CONSTRUCT_CHECK \
-	if (!dbh->driver) { \
+	if (!(PDO_CONSTRUCT_CHECK_COND)) { \
-		zend_throw_error(NULL, "%s object is uninitialized", ZSTR_VAL(Z_OBJ(EX(This))->ce->name)); \
+		PDO_CONSTRUCT_CHECK_FAIL(); \
 		RETURN_THROWS(); \
 	} \
 
 
+#define PDO_CONSTRUCT_CHECK_WITH_CLEANUP(cleanup) \
+	if (!(PDO_CONSTRUCT_CHECK_COND)) { \
+		PDO_CONSTRUCT_CHECK_FAIL(); \
+		goto cleanup; \
+	} \
+
+
 #endif	/* PHP_PDO_H */

ext/pdo_pgsql/pdo_pgsql.c

@@ -145,6 +145,36 @@ PHP_METHOD(Pdo_Pgsql, getPid)
 	pgsqlGetPid_internal(INTERNAL_FUNCTION_PARAM_PASSTHRU);
 }
 
+/* Sets a callback to receive DB notices (after client_min_messages has been set */
+PHP_METHOD(Pdo_Pgsql, setNoticeCallback)
+{
+	zend_fcall_info fci = empty_fcall_info;
+	zend_fcall_info_cache fcc = empty_fcall_info_cache;
+	if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "F!", &fci, &fcc)) {
+		RETURN_THROWS();
+	}
+
+	pdo_dbh_t *dbh = Z_PDO_DBH_P(ZEND_THIS);
+	PDO_CONSTRUCT_CHECK_WITH_CLEANUP(cleanup);
+
+	pdo_pgsql_db_handle *H = (pdo_pgsql_db_handle *)dbh->driver_data;
+
+	pdo_pgsql_cleanup_notice_callback(H);
+
+	if (ZEND_FCC_INITIALIZED(fcc)) {
+		H->notice_callback = emalloc(sizeof(zend_fcall_info_cache));
+		zend_fcc_dup(H->notice_callback, &fcc);
+	}
+
+	return;
+
+cleanup:
+	if (ZEND_FCC_INITIALIZED(fcc)) {
+		zend_fcc_dtor(&fcc);
+	}
+	RETURN_THROWS();
+}
+
 /* true global environment */
 
 /* {{{ PHP_MINIT_FUNCTION */

ext/pdo_pgsql/pdo_pgsql.stub.php

@@ -56,4 +56,6 @@ class Pgsql extends PDO
     public function getNotify(int $fetchMode = \PDO::FETCH_DEFAULT, int $timeoutMilliseconds = 0): array|false {}
 
     public function getPid(): int {}
+
+    public function setNoticeCallback(?callable $callback): void {}
 }

ext/pdo_pgsql/pdo_pgsql_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 519530b2da60dbd7a70af6d7c566d93930cfbb24 */
+ * Stub hash: 92d66416beab5094d0ca70565e691eacc3049d9c */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_Pdo_Pgsql_escapeIdentifier, 0, 1, IS_STRING, 0)
 	ZEND_ARG_TYPE_INFO(0, input, IS_STRING, 0)
@@ -50,6 +50,10 @@ ZEND_END_ARG_INFO()
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_Pdo_Pgsql_getPid, 0, 0, IS_LONG, 0)
 ZEND_END_ARG_INFO()
 
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_Pdo_Pgsql_setNoticeCallback, 0, 1, IS_VOID, 0)
+	ZEND_ARG_TYPE_INFO(0, callback, IS_CALLABLE, 1)
+ZEND_END_ARG_INFO()
+
 ZEND_METHOD(Pdo_Pgsql, escapeIdentifier);
 ZEND_METHOD(Pdo_Pgsql, copyFromArray);
 ZEND_METHOD(Pdo_Pgsql, copyFromFile);
@@ -60,6 +64,7 @@ ZEND_METHOD(Pdo_Pgsql, lobOpen);
 ZEND_METHOD(Pdo_Pgsql, lobUnlink);
 ZEND_METHOD(Pdo_Pgsql, getNotify);
 ZEND_METHOD(Pdo_Pgsql, getPid);
+ZEND_METHOD(Pdo_Pgsql, setNoticeCallback);
 
 static const zend_function_entry class_Pdo_Pgsql_methods[] = {
 	ZEND_ME(Pdo_Pgsql, escapeIdentifier, arginfo_class_Pdo_Pgsql_escapeIdentifier, ZEND_ACC_PUBLIC)
@@ -72,6 +77,7 @@ static const zend_function_entry class_Pdo_Pgsql_methods[] = {
 	ZEND_ME(Pdo_Pgsql, lobUnlink, arginfo_class_Pdo_Pgsql_lobUnlink, ZEND_ACC_PUBLIC)
 	ZEND_ME(Pdo_Pgsql, getNotify, arginfo_class_Pdo_Pgsql_getNotify, ZEND_ACC_PUBLIC)
 	ZEND_ME(Pdo_Pgsql, getPid, arginfo_class_Pdo_Pgsql_getPid, ZEND_ACC_PUBLIC)
+	ZEND_ME(Pdo_Pgsql, setNoticeCallback, arginfo_class_Pdo_Pgsql_setNoticeCallback, ZEND_ACC_PUBLIC)
 	ZEND_FE_END
 };
 

ext/pdo_pgsql/pgsql_driver.c

@@ -131,7 +131,7 @@ static void pdo_pgsql_fetch_error_func(pdo_dbh_t *dbh, pdo_stmt_t *stmt, zval *i
 }
 /* }}} */
 
-static void pdo_pgsql_cleanup_notice_callback(pdo_pgsql_db_handle *H) /* {{{ */
+void pdo_pgsql_cleanup_notice_callback(pdo_pgsql_db_handle *H) /* {{{ */
 {
 	if (H->notice_callback) {
 		zend_fcc_dtor(H->notice_callback);
@@ -1241,8 +1241,7 @@ PHP_METHOD(PDO_PGSql_Ext, pgsqlGetPid)
 }
 /* }}} */
 
-/* {{{ proto void PDO::pgsqlSetNoticeCallback(mixed callback)
+/* {{{ Sets a callback to receive DB notices (after client_min_messages has been set) */
-   Sets a callback to receive DB notices (after client_min_messages has been set) */
 PHP_METHOD(PDO_PGSql_Ext, pgsqlSetNoticeCallback)
 {
 	zend_fcall_info fci = empty_fcall_info;
@@ -1252,7 +1251,7 @@ PHP_METHOD(PDO_PGSql_Ext, pgsqlSetNoticeCallback)
 	}
 
 	pdo_dbh_t *dbh = Z_PDO_DBH_P(ZEND_THIS);
-	PDO_CONSTRUCT_CHECK;
+	PDO_CONSTRUCT_CHECK_WITH_CLEANUP(cleanup);
 
 	pdo_pgsql_db_handle *H = (pdo_pgsql_db_handle *)dbh->driver_data;
 
@@ -1262,6 +1261,14 @@ PHP_METHOD(PDO_PGSql_Ext, pgsqlSetNoticeCallback)
 		H->notice_callback = emalloc(sizeof(zend_fcall_info_cache));
 		zend_fcc_dup(H->notice_callback, &fcc);
 	}
+
+	return;
+
+cleanup:
+	if (ZEND_FCC_INITIALIZED(fcc)) {
+		zend_fcc_dtor(&fcc);
+	}
+	RETURN_THROWS();
 }
 /* }}} */
 

ext/pdo_pgsql/pgsql_driver.stub.php

@@ -34,6 +34,7 @@ class PDO_PGSql_Ext {
     /** @tentative-return-type */
     public function pgsqlGetPid(): int {}
 
-    /** @tentative-return-type */
+    /* Do NOT add new methods here. See https://wiki.php.net/rfc/pdo_driver_specific_subclasses
-    public function pgsqlSetNoticeCallback(?callable $callback): void {}
+     * Any new feature should be declared only on Pdo\Pgsql.
+     */
 }

ext/pdo_pgsql/pgsql_driver_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 14174ab18f198b9916f83986d10c93b657d8ffb9 */
+ * Stub hash: dd20abc5d8580d72b25bfb3c598b1ca54a501fcc */
 
 ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_class_PDO_PGSql_Ext_pgsqlCopyFromArray, 0, 2, _IS_BOOL, 0)
 	ZEND_ARG_TYPE_INFO(0, tableName, IS_STRING, 0)
@@ -46,10 +46,6 @@ ZEND_END_ARG_INFO()
 ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_class_PDO_PGSql_Ext_pgsqlGetPid, 0, 0, IS_LONG, 0)
 ZEND_END_ARG_INFO()
 
-ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_class_PDO_PGSql_Ext_pgsqlSetNoticeCallback, 0, 1, IS_VOID, 0)
-	ZEND_ARG_TYPE_INFO(0, callback, IS_CALLABLE, 1)
-ZEND_END_ARG_INFO()
-
 ZEND_METHOD(PDO_PGSql_Ext, pgsqlCopyFromArray);
 ZEND_METHOD(PDO_PGSql_Ext, pgsqlCopyFromFile);
 ZEND_METHOD(PDO_PGSql_Ext, pgsqlCopyToArray);
@@ -59,7 +55,6 @@ ZEND_METHOD(PDO_PGSql_Ext, pgsqlLOBOpen);
 ZEND_METHOD(PDO_PGSql_Ext, pgsqlLOBUnlink);
 ZEND_METHOD(PDO_PGSql_Ext, pgsqlGetNotify);
 ZEND_METHOD(PDO_PGSql_Ext, pgsqlGetPid);
-ZEND_METHOD(PDO_PGSql_Ext, pgsqlSetNoticeCallback);
 
 static const zend_function_entry class_PDO_PGSql_Ext_methods[] = {
 	ZEND_ME(PDO_PGSql_Ext, pgsqlCopyFromArray, arginfo_class_PDO_PGSql_Ext_pgsqlCopyFromArray, ZEND_ACC_PUBLIC)
@@ -71,6 +66,5 @@ static const zend_function_entry class_PDO_PGSql_Ext_methods[] = {
 	ZEND_ME(PDO_PGSql_Ext, pgsqlLOBUnlink, arginfo_class_PDO_PGSql_Ext_pgsqlLOBUnlink, ZEND_ACC_PUBLIC)
 	ZEND_ME(PDO_PGSql_Ext, pgsqlGetNotify, arginfo_class_PDO_PGSql_Ext_pgsqlGetNotify, ZEND_ACC_PUBLIC)
 	ZEND_ME(PDO_PGSql_Ext, pgsqlGetPid, arginfo_class_PDO_PGSql_Ext_pgsqlGetPid, ZEND_ACC_PUBLIC)
-	ZEND_ME(PDO_PGSql_Ext, pgsqlSetNoticeCallback, arginfo_class_PDO_PGSql_Ext_pgsqlSetNoticeCallback, ZEND_ACC_PUBLIC)
 	ZEND_FE_END
 };

ext/pdo_pgsql/php_pdo_pgsql_int.h

@@ -108,6 +108,8 @@ enum pdo_pgsql_specific_constants {
 php_stream *pdo_pgsql_create_lob_stream(zval *pdh, int lfd, Oid oid);
 extern const php_stream_ops pdo_pgsql_lob_stream_ops;
 
+void pdo_pgsql_cleanup_notice_callback(pdo_pgsql_db_handle *H);
+
 void pdo_libpq_version(char *buf, size_t len);
 void pdo_pgsql_close_lob_streams(pdo_dbh_t *dbh);
 

ext/pdo_pgsql/tests/issue78621.inc

@@ -1,9 +1,14 @@
 <?php
 require_once dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
 require_once dirname(__FILE__) . '/config.inc';
-$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
+if (!isset($db)) {
+    $db = new Pdo\Pgsql($config['ENV']['PDOTEST_DSN']);
+}
+if (!isset($rounds) || empty($rounds)) {
+    $rounds = [ null, 'Re' ];
+}
 
-attach($db);
+attach($db, array_shift($rounds));
 
 $db->beginTransaction();
 $db->exec("set client_min_messages to notice");
@@ -11,10 +16,20 @@ $db->exec("create temporary table t (a varchar(3))");
 $db->exec("create function hey() returns trigger as \$\$ begin new.a := 'oh'; raise notice 'I tampered your data, did you know?'; return new; end; \$\$ language plpgsql");
 $db->exec("create trigger hop before insert on t for each row execute procedure hey()");
 $db->exec("insert into t values ('ah')");
-attach($db, 'Re');
+while (count($rounds)) {
-$db->exec("delete from t");
+    try {
-$db->exec("insert into t values ('ah')");
+        attach($db, array_shift($rounds));
-$db->pgsqlSetNoticeCallback(null);
+    } catch (Throwable $err) {
+        echo "Caught ".get_class($err).": ".$err->getMessage()."\n";
+    }
+    try {
+        $db->exec("delete from t");
+        $db->exec("insert into t values ('ah')");
+    } catch (Throwable $err) {
+        echo "Caught ".get_class($err)." ".$err->getMessage()."\n";
+    }
+}
+$db->setNoticeCallback(null);
 $db->exec("delete from t");
 $db->exec("insert into t values ('ah')");
 var_dump($db->query("select * from t")->fetchAll(PDO::FETCH_ASSOC));

ext/pdo_pgsql/tests/issue78621.phpt

@@ -1,5 +1,5 @@
 --TEST--
-pgsqlSetNoticeCallback catches Postgres "raise notice".
+Pdo\Pgsql::setNoticeCallback catches Postgres "raise notice".
 --SKIPIF--
 <?php
 if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) die('skip not loaded');
@@ -13,7 +13,7 @@ function disp($message) { echo trim($message)."\n"; }
 function dispRe($message) { echo "Re".trim($message)."\n"; }
 function attach($db, $prefix = '')
 {
-    $db->pgsqlSetNoticeCallback('disp'.$prefix);
+    $db->setNoticeCallback('disp'.$prefix);
 }
 require dirname(__FILE__) . '/issue78621.inc';
 ?>

ext/pdo_pgsql/tests/issue78621_closure.phpt

@@ -1,5 +1,5 @@
 --TEST--
-pgsqlSetNoticeCallback catches Postgres "raise notice".
+Pdo\Pgsql::setNoticeCallback catches Postgres "raise notice".
 --SKIPIF--
 <?php
 if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) die('skip not loaded');
@@ -16,13 +16,13 @@ function attach($db, $prefix = '')
     switch($flavor)
     {
         case 0:
-            $db->pgsqlSetNoticeCallback(function($message) use($prefix) { echo $prefix.trim($message)."\n"; });
+            $db->setNoticeCallback(function($message) use($prefix) { echo $prefix.trim($message)."\n"; });
             // https://github.com/php/php-src/pull/4823#pullrequestreview-335623806
             $eraseCallbackMemoryHere = (object)[1];
             break;
         case 1:
             $closure = function($message) use($prefix) { echo $prefix.'('.get_class($this).')'.trim($message)."\n"; };
-            $db->pgsqlSetNoticeCallback($closure->bindTo(new \stdClass));
+            $db->setNoticeCallback($closure->bindTo(new \stdClass));
             break;
     }
 }

ext/pdo_pgsql/tests/issue78621_method.phpt

@@ -1,5 +1,5 @@
 --TEST--
-pgsqlSetNoticeCallback catches Postgres "raise notice".
+Pdo\Pgsql::setNoticeCallback catches Postgres "raise notice".
 --SKIPIF--
 <?php
 if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) die('skip not loaded');
@@ -16,26 +16,24 @@ class Logger
     public function __call(string $method, array $args)
     {
         $realMethod = strtr($method, [ 'whatever' => 'disp' ]);
+        if (!method_exists($this, $realMethod)) {
+            throw new BadMethodCallException('Call to undefined method '.__CLASS__.'::'.$realMethod);
+        }
         echo "$method trampoline for $realMethod\n";
         return call_user_func_array([ $this, $realMethod ], $args);
     }
 }
 $logger = new Logger();
-function attach($db, $prefix = '')
+function attach($db, $method)
 {
     global $logger;
-    global $flavor;
+    $db->setNoticeCallback([ $logger, $method ]);
-    switch($flavor)
-    {
-        case 0: $db->pgsqlSetNoticeCallback([ $logger, 'disp'.$prefix ]); break;
-        case 1: $db->pgsqlSetNoticeCallback([ $logger, 'whatever'.$prefix ]); break;
-    }
 }
 echo "Testing with method explicitely plugged:\n";
-$flavor = 0;
+$rounds = [ 'disp', 'dispRe' ];
 require dirname(__FILE__) . '/issue78621.inc';
 echo "Testing with a bit of magic:\n";
-++$flavor;
+$rounds = [ 'whatever', 'whateverRe', 'unexisting' ];
 require dirname(__FILE__) . '/issue78621.inc';
 ?>
 --EXPECT--
@@ -55,6 +53,7 @@ whatever trampoline for disp
 NOTICE:  I tampered your data, did you know?
 whateverRe trampoline for dispRe
 ReNOTICE:  I tampered your data, did you know?
+Caught BadMethodCallException Call to undefined method Logger::unexisting
 array(1) {
   [0]=>
   array(1) {

ext/pdo_pgsql/tests/pdopgsql_setNoticeCallback.phpt

@@ -0,0 +1,43 @@
+--TEST--
+Pdo\Pgsql::setNoticeCallback()
+--EXTENSIONS--
+pdo
+pdo_pgsql
+--SKIPIF--
+<?php
+require __DIR__ . '/config.inc';
+require dirname(__DIR__, 2) . '/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+
+require_once __DIR__ . "/config.inc";
+
+$db = new Pdo\Pgsql($config['ENV']['PDOTEST_DSN']);
+
+function disp($message) { echo trim($message)."\n"; }
+function attach($db, $callback) { $db->setNoticeCallback($callback); }
+
+$rounds = [
+    'disp', // Correct.
+    3, // Error, so the old callback is kept, and will be used in the call that follows the caught error.
+    null, // No callback. Hopefully this clears everything.
+    'wouldAnyoneNameAFunctionThatWay', // So this one will crash and *no output will follow*.
+];
+require __DIR__ . '/issue78621.inc';
+
+?>
+--EXPECTF--
+NOTICE:  I tampered your data, did you know?
+Caught TypeError: %s: Argument #1 ($callback) %s
+NOTICE:  I tampered your data, did you know?
+Caught TypeError: %s: Argument #1 ($callback) %s
+array(1) {
+  [0]=>
+  array(1) {
+    ["a"]=>
+    string(2) "oh"
+  }
+}
+Done

ext/pdo_pgsql/tests/pdopgsql_setNoticeCallback_trampoline_no_leak.phpt

@@ -0,0 +1,58 @@
+--TEST--
+Pdo\Pgsql::setNoticeCallback() use F ZPP for trampoline callback and does not leak
+--EXTENSIONS--
+pdo
+pdo_pgsql
+--SKIPIF--
+<?php
+require __DIR__ . '/config.inc';
+require dirname(__DIR__, 2) . '/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+
+require_once __DIR__ . "/config.inc";
+
+$db = new Pdo\Pgsql($config['ENV']['PDOTEST_DSN']);
+
+function disp($message) { echo trim($message)."\n"; }
+function attach($db, $callback)
+{
+    if (is_array($callback) && $callback[0] === null) {
+        $callback = $callback[1];
+        $rc = new ReflectionClass(Pdo\Pgsql::class);
+        $db = $rc->newInstanceWithoutConstructor();
+    }
+    $db->setNoticeCallback($callback);
+}
+
+class T { public function z($m) { echo $m."\n"; } public function __call($m, $p) { echo "bah $m\n"; } }
+$t = new T;
+$rounds = [
+    [ $t, 'disp' ],
+    3, // Error; but then as the old callback is kept, it will be used in the call that follows the caught error.
+    null, // No callback: clear everything.
+    'wouldAnyoneNameAFunctionThisWay', // So this one will crash and *no output will follow*.
+    [ null, [ $t, 'disp' ] ], // Valid callback on an unvalid Pdo.
+    [ $t, 'disp' ],
+];
+require __DIR__ . '/issue78621.inc';
+
+?>
+--EXPECTF--
+bah disp
+Caught TypeError: %s: Argument #1 ($callback) %s
+bah disp
+Caught TypeError: %s: Argument #1 ($callback) %s
+Caught Error: %s object is uninitialized
+bah disp
+array(1) {
+  [0]=>
+  array(1) {
+    ["a"]=>
+    string(2) "oh"
+  }
+}
+Done
+