捕获var_dump输出

Question

我有以下代码：

$img_title_display = mysqli_query($db, "SELECT DISTINCT title FROM images WHERE user_id='$user_id' ORDER BY title");

while($row = $img_title_display->fetch_assoc())
{   
    var_dump($row['title']);
}

，输出如下：

string(6) "title1" string(6) "title2" string(6) "title3" string(6) "title4" string(6) "title5" string(6) "title6" string(6) "title7" string(6) "title8"

如何清除输出以便它就像：title1 title2 title3 title4 title5 title6 title7 title8？

Answer 1

你应该只使用echo函数

Answer 2

echo '<pre>'.print_r($row['title'],1).'</pre>';

foreach($row['title'] as $title){
 echo '<pre>'.print_r($title,1).'</pre>';
}

Answer 3

$img_title_display = mysqli_query($db, "SELECT DISTINCT title FROM images WHERE user_id='$user_id' ORDER BY title");

while($row = $img_title_display->fetch_assoc())
{   
    echo $row['title'];
}