Question

我的页面上有某种时间表，并且我正在从数据库中获取3条最新消息：

<div id="timeline">
<?php
 $SQLGetNews = $odb -> query("SELECT * FROM `news` ORDER BY `id` DESC LIMIT 3");
 while ($getInfo = $SQLGetNews -> fetch(PDO::FETCH_ASSOC)) {
    $name = $getInfo['name'];
    /*It should be like that
      <div class="left">'.$name.'</div>
      <div class="right">'.$name.'</div>
      I know that i have to echo it somehow by targeting first, second, third output?
    */
 }
?>
</div>

Answer 1

因此，您要像左，右，然后左对齐那样打印信息，您可以像下面那样进行打印。

<div id="timeline">
<?php
 $SQLGetNews = $odb -> query("SELECT * FROM `news` ORDER BY `id` DESC LIMIT 3");
 $i=1;
 while ($getInfo = $SQLGetNews -> fetch(PDO::FETCH_ASSOC)) {
    $name = $getInfo['name'];
    if($i%2)
    {
        echo '<div class="right">'.$name.'</div>';
    }
    else
    {
        echo '<div class="left">'.$name.'</div>';
    }
    $i++;
    /*It should be like that
      <div class="left">'.$name.'</div>
      <div class="right">'.$name.'</div>
      I know that i have to echo it somehow by targeting first, second, third output?
    */
 }
?>
</div>

Answer 2

这应该说明您可以在迭代时在左右之间交替进行的操作。

function isEven(int $num):bool{
    return $num % 2 == 0;
}

$len = count($names = ['foo','bar','fez']);

$i = 0;
while($i < $len){
    $name = $names[$i];
    $class = "right";
    if(isEven($i)){
        $class = "left";
    }
    echo $name . " is on the " . $class . "\n";
    $i++;
}

// foo is on the left
// bar is on the right
// fez is on the left

Answer 3

<div id="timeline">
<?php
 $SQLGetNews = $odb -> query("SELECT * FROM `news` ORDER BY `id` DESC LIMIT 3");
 $i=1;
 while ($getInfo = $SQLGetNews -> fetch(PDO::FETCH_ASSOC)) {
    $name = $getInfo['name'];
    if($i%2)
    {
      ?>
        <div class="right"><?php echo $name; ?></div>
      <?php
    }
    else
    {
      ?>
         <div class="left"><?php echo $name; ?></div>
      <?php
    }
    $i++;
    /*It should be like that
      <div class="left">'.$name.'</div>
      <div class="right">'.$name.'</div>
      I know that i have to echo it somehow by targeting first, second, third output?
    */
 }
?>
</div>

如何与MySQL数据不同地回显1 div？

3 个答案: