6 var_dump(preg_match('', '', $match, 0xfff));
8 var_dump(preg_match('/\d+/', '123 456 789 012', $match, 0, -8));
11 var_dump(preg_match('/\d+/', '123 456 789 012', $match, 0, -500));
14 var_dump(preg_match_all('/\d+/', '123 456 789 012', $match, 0, -8));
17 var_dump(preg_match('/(?P<3>)/', ''));
22 Warning: preg_match(): Empty regular expression in %smatch_flags3.php on line 3
45 Warning: preg_match(): Numeric named subpatterns are not allowed in %smatch_flags3.php on line 14