Simple If statement to stop blank form entry

What can i add above or below this to replace a blank form entry to the word "anonymous" without making the code explode. or do you need more code
I know i can do it with an if statement but i just cant figure out how
thanks

</p>
<form method="post" action="hminsbest.php">
<input type="hidden" name="wordid" value="<?=$_SESSION['gcid']; ?>" />
<input type="hidden" name="besttime" value="<?=$tempo; ?>" />
<input type="hidden" name="besttent" value="<?=$tentativi; ?>" />
<p><?=INSRT; ?><input type="text" name="newbest" size="20" maxlength="20" />
<input type="submit" value="<?=SBMT; ?>" name="go" /></p>
</form>

HTML:

 

if(strlen($var) === 0) { $var = "anon"; }

something like that
or
if($var == '') { $var = "anon"; }

either way should be fine.

 

You could also use

 
if(empty($var)) 
 { 
$var = "anonymous"; 
 }

PHP:

 

hi Dirty-Rockstart, have the above suggestions solved the issue for you ?