PHP時間變量在while循環中不起作用

Question

我從數據庫中獲取時間，當我將其回顯時，它可以工作，但在while循環中不起作用。 但是，其他變量可以工作...

碼：

$resultevent = mysql_query('SELECT  venue, date, TIME_FORMAT(startTime, "%h:%i %p") AS startTime2, TIME_FORMAT(endTime, "%h:%i %p") AS endTime2 FROM events"');
$rowevent = mysql_fetch_assoc($resultevent);

$date = new DateTime($originaldate);
$newdate = $date->format('m/d/Y');
$startTime2 = $rowevent['startTime'];
$endTime2 = $rowevent['endTime'];
$venue = $rowevent['venue'];

echo $startTime2; <============== WORKS HERE

while ($row = mysql_fetch_assoc($result)) { //the code for these queries is not shown
   echo 'getting here'; <======= WORKS
   echo $venue; <======= WORKS
   echo $startTime2; <======= DOESNT WORK
}

Answer 1

您的查詢返回帶有別名的時間列。 要從您的行中讀取它們，您應該使用別名作為索引：

$startTime2 = $rowevent['startTime2'];
$endTime2 = $rowevent['endTime2'];

Answer 2

1，在你的循環中$results是從哪里來的？ 2.您在查詢中將startTime設置為startTime2，與endTime到endTime2相同。 很明顯，即使您echo $venue ..也無法使用，因為您什么也沒拿到。

它應該像這樣的代碼：

    $date = new DateTime($originaldate);
    $resultevent = mysql_query('SELECT  venue, date, TIME_FORMAT(startTime, "%h:%i %p") AS startTime2, TIME_FORMAT(endTime, "%h:%i %p") AS endTime2 FROM events"');

    while ($rowevent = mysql_fetch_assoc($resultevent)) { //now you fetch your query in $resultevent

       $newdate = $date->format('m/d/Y');
       $startTime2 = $rowevent['startTime2'];
       $endTime2 = $rowevent['endTime2'];
       $venue = $rowevent['venue'];

       echo 'getting here';
       echo $venue; 
       echo $startTime2;
    }