Question

我有一个fetch_assoc查询，可以抓取14行，但是我希望显示FIRST结果，这样其他人就不同了，其余的只是普通的。

    $site_events = $db->query("SELECT * FROM site_events ORDER BY time ASC limit 14");
        while($events = $site_events->fetch_assoc()) {

        if( first result???? ) { //this is where im stuck
           echo $events['title'], 'FIRST RESULT';
        }

        //then display others like a normal list..
        echo $events['title'], '<br />';
   }

Answer 1

我基于Yatin Trivedi的回答，但是用一个我未设置的变量删除了增量。你不会注意到差异，但这有点快。这是因为每次尝试都不需要调用$i++。此外，unset()非常快。编辑：该答案以$i=0和$i++开头，现在它已经不存在了：）

$hasNotLooped = true; // set it before you run the loop
$site_events = $db->query("SELECT * FROM site_events ORDER BY time ASC limit 14");
    while($events = $site_events->fetch_assoc()) {

    if( $hasNotLooped ) {
       echo $events['title'], 'FIRST RESULT';
       unset($hasNotLooped);
    }
    //then display others like a normal list..
    echo $events['title'], '<br />';
}

Answer 2

您可以在“while”之外获取第一行，然后正常继续。但首先你应该检查是否有选择的数据以防万一：

$site_events = $db->query("SELECT * FROM site_events ORDER BY time ASC limit 14");
if($db->field_count){
   $event = $site_events->fetch_assoc();
   echo $event['title'], 'FIRST RESULT';

   while($events = $site_events->fetch_assoc()) {

     //then display others like a normal list..
     echo $events['title'], '<br />';
   }
}

Answer 3

$tmp=true;
$site_events = $db->query("SELECT * FROM site_events ORDER BY time ASC limit 14");
    while($events = $site_events->fetch_assoc()) {

    if( $tmp) { //this is where im stuck
       echo $events['title'], 'FIRST RESULT';
       $tmp=false;
    }
    else
    {
    //then display others like a normal list..
    echo $events['title'], '<br />';
    }
}

Mysqli fetch_assoc第一个结果

3 个答案: