What is wrong with this line?

[yoki]

I'm trying to get the checkbox checked once the page has been posted to itself...

Here is my line:

print ("<td>".add('<input type="checkbox" name="Presenting_Author" id="" value="'.$i.'" checked="'.if ($_POST['Presenting_Author'] == $i) echo "checked";.'"/>')."</td>");

I can't seem to find my error...

[cahva]

You just cant put anything within print or echo, atleast not if statements. How about doing it the old fashioned way:

echo '<td><input type="checkbox" name="Presenting_Author" id="" value="'.$i.'"';
if ($_POST['Presenting_Author'] == $i) 
	echo ' checked="checked"';
echo '></td>';