Why $_REQUEST do the same thing as mysql_escape_string()

I put some thing in an form input filed like this:
' " \
then submit to a php script.
When use $_GET / $_POST / $_REQUEST to get the value,
I always get:
\' \" \\
In php expression it should be:
$_REQUEST['field'] = "\\' \\\" \\\\";

Any one who can tell me why?

On 10/17/07, truncatei@gmail.com <truncatei@gmail.com> wrote:
> I put some thing in an form input filed like this:
> ' " \
> then submit to a php script.
> When use $_GET / $_POST / $_REQUEST to get the value,
> I always get:
> \' \" \\
> In php expression it should be:
> $_REQUEST['field'] = "\\' \\\" \\\\";
>
> Any one who can tell me why?
>

magic_quotes_gpc

Also it doesn't necessarily do the same thing.
mysql_real_escape_string() takes into consideration character sets.