在php上查看数据时给出默认值

Question

我尝试使用以下代码获取数据

$result = $viral->getData("SELECT * FROM preview WHERE id=$id");

foreach ($result as $res) {
  $title = $res['title'];
  $promoted = $res['promoted'];
  $photo = $res['file'];
}

我用这段代码查看查询结果

<p><?php echo $title;?></p>

我想当数据库中的值$ title为空时，它将自动替换为我的默认值。

当变量$ title为空时，我可以给出默认值吗？

Answer 1

试试这个

 $title = $res['title'];
 echo "<p>" . (($title == "" || $title == NULL) ? "Default Value" : $title) . "</p>"

Answer 2

这可以这样做，请尝试

$result = $viral->getData("SELECT * FROM preview WHERE id=$id");

foreach ($result as $res) {
  $title = empty($res['title'])? "Your Default Valur or Variable":$res['title'];
  $promoted = $res['promoted'];
  $photo = $res['file'];
}

或者如果您只使用$title变量，请使用此

empty($title)? "Your Default Valur or Variable":$title;

Answer 3

你可以尝试

$title = $res['title'];
if (empty($title){
    $title = "assign default title";
}