--- /dev/null
+--TEST--
+Bug #43831 ($this gets mangled when extending PDO with persistent connection)
+--FILE--
+<?php
+
+class Foo extends PDO {
+ function __construct($dsn) {
+ parent::__construct($dsn, null, null, array(PDO::ATTR_PERSISTENT => true));
+ }
+}
+
+class Baz extends PDO {
+ function __construct($dsn) {
+ parent::__construct($dsn, null, null, array(PDO::ATTR_PERSISTENT => true));
+ }
+}
+
+class Bar extends Baz {
+ function quux() {
+ echo get_class($this), "\n";
+ $foo = new Foo("sqlite::memory:");
+ echo get_class($this), "\n";
+ }
+}
+
+$bar = new Bar("sqlite::memory:");
+$bar->quux();
+
+
+class MyPDO extends PDO {}
+
+$bar = new PDO("sqlite::memory:", null, null, array(PDO::ATTR_PERSISTENT => true));
+$baz = new MyPDO("sqlite::memory:", null, null, array(PDO::ATTR_PERSISTENT => true));
+
+var_dump($bar);
+unset($bar);
+var_dump($baz);
+var_dump($bar);
+
+
+?>
+--EXPECTF--
+Bar
+Bar
+object(MyPDO)#%d (0) {
+}
+object(MyPDO)#%d (0) {
+}
+
+Notice: Undefined variable: bar in %s on line %d
+NULL