Description:
------------
The following code produces this result:

a2345

This behaviour is not very useful, because this kind of error is extremly difficult to find.



Reproduce code:
---------------
<?php
$in=array(
    'params' => 'action=bla',
    'action' => '',
    );
$params="12345";
// by error $params is a string
// instead of array or empty

$params['action']=@$in['params'];
// and the following 2000 lines
// of code is able to handle $params either
// as array OR string (e. g.
// cause of backward compatibility to
// further versions of $in)

print_r($params);
?>

Expected result:
----------------
One (or more) of these

* an array (
[0] => 12345
[action] => action=bla
)

* if this result above, a warning message
'String is automagically converted to array, line 8'

* an error message
'A string cannot indiced via string-type, use integer only, line 8'

* a warning message
'Use of [] while indexing a string is depricated, use {}, line 8'

* an error message
'Use of [] while indexing a string is not longer allowed, use {} instead, line 8'


Actual result:
--------------
a2345