这句if正确得怎么写？

这句if正确得如何写？？
if ($_GET['lx'] == "1"): 
$file_name = $r['titlepic'];
else
$file_name = $r['picurl'];
end if

这句正确得如何写？？

分享到：
------解决方案--------------------

if ($_GET['lx'] == "1"): <br />
$file_name = $r['titlepic'];<br />
else:<br />
$file_name = $r['picurl'];<br />
endif;

------解决方案--------------------

if..endif syntax<br />
The `alternative' way to write if/elseif/else statements, using if(); elseif(); else; endif; cannot be efficiently implemented without adding a large amount of complexity to the 3.0 parser. Because of this, the syntax has been changed: Example E-5. Migration: old if..endif syntax<br />
<br />
if ($foo);<br />
    echo "yep\n";<br />
elseif ($bar);<br />
    echo "almost\n";<br />
else;<br />
    echo "nope\n";<br />
endif;  <br />
 <br />
Example E-6. Migration: new if..endif syntax<br />
<br />
if ($foo):<br />
    echo "yep\n";<br />
elseif ($bar):<br />
    echo "almost\n";<br />
else:<br />
    echo "nope\n";<br />
endif;  <br />
 <br />
Notice that the semicolons have been replaced by colons in all statements but the one terminating the expression (endif). <br />
<br />