Description:
------------
hello,

I get strange behaviour with array:

<?php

$array = array ( 'TM' => 'test', 'autre dossier' => 'texte' ) ;

print_r ( $array );

echo $array['TM']['TM']."\n";
?>

the echo command return the first character of string. But $array['TM'] is not an array, so i expext to have an error wen i call $array['TM']['TM']. 
But PHP convert the second index to 0. 

Thanks

Reproduce code:
---------------
<?php

$array = array ( 'TM' => 'test', 'autre dossier' => 'texte' ) ;

print_r ( $array );

echo $array['TM']['TM']."\n";
?>


Expected result:
----------------
return error or warning.

Actual result:
--------------
return the first character of the string