没有找到行时如何显示“无结果”消息？

Question

如果未找到任何行，如何显示“未找到结果”消息？

while($row = $query->fetch(PDO::FETCH_ASSOC)) 
{
    echo $row['name'];
} 

Answer 1

 $matched = false;
 while($row = $query->fetch(PDO::FETCH_ASSOC)) 
 {
    $matched = true;
    echo $row['name'];
 }
 if(!$matched)
     echo "no any"; 

Answer 2

另一个......

$kittens = $query->fetchAll(PDO::FETCH_ASSOC))

if(!$kittens )
{
    //Nada
}
else
{
    foreach($kittens as $kitten)
    {

    }
}

Answer 3

只是一种替代解决方案，您可以添加if条件。

if ($row = $query->fetch(PDO::FETCH_ASSOC)) {
   echo $row['name'];
   while($row = $query->fetch(PDO::FETCH_ASSOC)) {
        echo $row['name'];
   } 
} else {
   echo "no results found";
}