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？？

回复讨论(解决方案)

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

if..endif syntaxThe `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 syntaxif ($foo);    echo "yep\n";elseif ($bar);    echo "almost\n";else;    echo "nope\n";endif;   Example E-6. Migration: new if..endif syntaxif ($foo):    echo "yep\n";elseif ($bar):    echo "almost\n";else:    echo "nope\n";endif;   Notice that the semicolons have been replaced by colons in all statements but the one terminating the expression (endif).