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--TEST-- 
Changing from an interable type to a non iterable type during the iteration 
--FILE--
<?php
echo "\nChange from array to non iterable:\n";
$a = array(1,2,3);
$b=&$a;
foreach ($a as $v) {
	var_dump($v);
	$b=1;
}

echo "\nChange from object to non iterable:\n";
$a = new stdClass;
$a->a=1;
$a->b=2;
$b=&$a;
foreach ($a as $v) {
	var_dump($v);
	$b='x';	
}

?>
--EXPECTF--

Change from array to non iterable:
int(1)

Warning: Invalid argument supplied for foreach() in %s on line 5

Change from object to non iterable:
int(1)

Warning: Invalid argument supplied for foreach() in %s on line 15