相关疑难解决方法(0)

我一直在研究这段代码大约一个小时,似乎无法弄清楚它为什么不起作用.PHP允许在While循环中使用If/Else语句吗？我尝试在If/Else语句中添加不同的回声,后者(Else)不会显示.这是因为我正在尝试使用相同的变量名称吗？

while($row = mysql_fetch_array($result))

{

//assign variables
$title = $row['title'];
$file_url = $row['file_location'];
$category = $row['category'];
$layout = $row['layout'];


    If ($layout = "vertical")       
    {
        //Page Layout
        $BODYLAYOUT = "vertical_body";
        $GAMECONTAIN = "vertical_gameContain";
        $GAMEWIDTH = "vertical_game";
    }
    Else
    {
        // Page Layout
        $BODYLAYOUT = "horizontal_body";
        $GAMECONTAIN = "horizontal_gameContain";
        $GAMEWIDTH = "horizontal_game";
    }