Description:
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Accessing undefined object members gives a wrong notice message if the member contains a zero byte. The problem occurs in real code when request parameters are put as members in controller or request objects.

Test script:
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<?php
ini_set('error_reporting', E_ALL);
ini_set('display_errors', 1);

$obj = new stdclass();
echo $obj->{"foo\0bar"};

$obj->{"foo\0bar"} = 1;
echo $obj->{"foo\0bar"};

Expected result:
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sapi/cli/php /tmp/test.php

Notice: Undefined property: stdClass::$foobar in /tmp/test.php on line 6
1

Actual result:
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sapi/cli/php /tmp/test.php

Notice: Undefined property: stdClass::$foo in /tmp/test.php on line 6
1