<?php
echo "Numeric strings will be converted into an integer\n";
var_dump(array(
1 => 1,
'1' => '1',
's1' => 's1',
));
echo "Booleans will be converted into an integer:\n";
var_dump(array(
0 => 0,
1 => 1,
true => true,
false => false,
));
echo "NULL will be converted into an empty string:\n";
var_dump(array(
'' => '',
null => null,
));
echo "A resource will be converted into an integer:\n";
var_dump(array(
STDIN => 'STDIN',
));