Description:
------------
If I index a scalar or NULL variable as if it were an array, I get NULL back with no warning or notice. This is true for any index value, including 0.  I expected an Undefined offset or incorrect type message.  The manual says an integer variable = n will convert to array(0=>$n); that works on casting to array but not on indexing.


Reproduce code:
---------------
<?php
error_reporting(E_ALL+E_STRICT);
$arry = array(1=>1);
$notarry = NULL;
$intvar = 123;
echo "1. arry[1] = " . $arry[1] . "\n";
echo "2. arry[2] = " . $arry[2] . "\n";
echo "3. intvar[0] = " . $intvar[0] . "\n";
echo "4. intvar[1] = " . $intvar[1] . "\n";
echo "5. notarry[1] = " . $notarry[1] . "\n";


Expected result:
----------------
"Notice: Undefined offset" (or incorrect type) for (2), (3), (4), and (5). Or maybe (3) should echo "123" via implicit cast. But only (2) raises a Notice; the others just echo NULL. 


Actual result:
--------------
1. arry[1] = 1

Notice: Undefined offset:  2 in /a5/home/ljb/lang/php/p.php on line 7
2. arry[2] = 
3. intvar[0] = 
4. intvar[1] =
5. notarry[1] =