虽然循环不能像预期的那样使用变量

Question

The following code works fine when i remove the && $f<4, but with it in, it doesn't work.

PHP:

$titles=array();
$f=0;
while ($row=mysql_fetch_assoc($query) && $f<4){  //this line doesn't work
        $titles[]=$row['questiontitle'];
            echo "<div class='questionPreview'>$titles[$f]</div>";
            $f++;
        }

Answer 1

If I interpret you correctly I think you are having a precedence problem. Try this:

while (($row=mysql_fetch_assoc($query)) && ($f<4)){