[Login System -- not working]

change:
[code] <form name="login" method="post" action="php_self">[/code]

to:
[code]  <form name="login" method="post" action="$PHP_SELF">[/code]

[include() problem..can't show the page...]

For including PHP in HTML files just do like this:

[code]
HTML here
<?php
include("path/to/file.php");
?>
HTML continue here
[/code]

[PHP CLI binary]

Hello, thanks for this geek forum

im really finding for answer

I have Appserv in my computer, with PHP/MySqL

what's PHP CLI binary?

and how can i get the path of "PHP CLI binary"

thanks for your help & sorry for my bad english

[difference between two dates on users input]

I wrote a simple example, try what I wrote

test.php (file)
[code]<?php
echo "<form align='center' method=post action='t.php'>";
echo "Data 1:";
echo "<br /><input type=text name='data1'>";
echo "<br /><br />Date 2:";
echo "<br /><input type=text name='data2'>";
echo "<br /><br />";
echo "<input align='center' type=submit value='Submit'>";
echo "</form>";
?>[/code]

t.php (file)
[code]<?php
if ($REQUEST_METHOD=="POST") {
$date_a = strtotime($_POST['data1']);
$date_b = strtotime($_POST['data2']);
$days = ($date_b - $date_a) / (60*60*24);
echo number_format($days);
} else {
//have no posts
echo "error";
}
?>[/code]

It should work well.