If i insert into a form field a <'> or a <"> or a <\>
in the string var result i have <\`> or <\"> or <\\> respectly.

The script that reproduces the problem is this:

<FORM method=get>
<input type=text name=ciccio value="<?print($ciccio);?>">
<input type=submit name=Submit value="submit">
</FORM>
<?print("<h1>$ciccio</h1>");?>

For example:

In the text i write:                         "xx'xx\x"
$ciccio var (after submit query) is:     \"xx\'xx\\x\"

This is a bug ?

If you search on www.php.net trought the form you can view the problem.
You write the string: """"" end it search: \"\"\"\"\"