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--TEST--
Testing operations with undefined variable
--FILE--
<?php
var_dump($a[1]);
var_dump($a[$c]);
var_dump($a + 1);
var_dump($a + $b);
var_dump($a++);
var_dump(++$b);
var_dump($a->$b);
var_dump($a->$b);
var_dump($a->$b->{$c[1]});
?>
--EXPECTF--
Warning: Undefined variable $a in %s on line %d
Warning: Trying to access array offset on null in %s on line %d
NULL
Warning: Undefined variable $a in %s on line %d
Warning: Undefined variable $c in %s on line %d
Warning: Trying to access array offset on null in %s on line %d
NULL
Warning: Undefined variable $a in %s on line %d
int(1)
Warning: Undefined variable $a in %s on line %d
Warning: Undefined variable $b in %s on line %d
int(0)
Warning: Undefined variable $a in %s on line %d
NULL
Warning: Undefined variable $b in %s on line %d
int(1)
Warning: Attempt to read property "1" on int in %s on line %d
NULL
Warning: Attempt to read property "1" on int in %s on line %d
NULL
Warning: Undefined variable $c in %s on line %d
Warning: Trying to access array offset on null in %s on line %d
Warning: Attempt to read property "1" on int in %s on line %d
Warning: Attempt to read property "" on null in %s on line %d
NULL
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