Error when running code

I seem to run into the a parse error when running my php code

"unexpected T_Variable on line 8"

here is my code:

<?php

mysql_connect (localhost,root) or die ('no server');
mysql_select_db($widget) or die ('no data');

$sql ("insert into users from widget.sql file")

$sql=("insert into users (fname,lname,street,state")values('$POST[fname]',
'$POST[lname]',
'$POST[street]',
'$POST[state]');

mysql_query($sql) or die ('no query');

echo "$POST[fname] $POST[lname] has been added.<p>
<a href=add.php>Add another</a><p>
<a href=display.php>show data</a>
";
?>

thanks

firstly, what's line 6 doing?

depends on what you call line 6, the blank space is doing nothing but '$_POST[lname],' us callng for my last name variable right?

this is line 6:

$sql ("insert into users from widget.sql file")

I thought it was telling all of what I put in my form to go to that file. Do I not need it.

It's a mysql database btw