如何對 MySQLi 結果集進行分類？

Question

如何更改下面的代碼，以便我只回顯每個唯一的“$course”一次？

例如。 目前我的結果看起來像 =

ipswich-11:00-running ipswich-12:00-火烈鳥騎手 ipswich-14:00-lightning norwich-13:10-ed 回來了 norwich-14:05-redrum norwich-17:05-pickle

但我希望它們看起來像 =

伊普斯維奇

11:00-奔跑 12:00-火烈鳥騎士 14:00-閃電

諾維奇

13:10-ed 回來了 14:05-redrum 17:05-pickle

我想過在 for each 循環中做一個 mysqli 查詢，但肯定有更好的方法嗎？

我的代碼 =

<?php //connection block

if ($mysqli->connect_error) {die('Connect Error: ' . $mysqli->connect_error);}

$today = date("Ymd");
$query = "SELECT horse, course, time, date FROM dailytips WHERE date = $today ORDER BY course, time"; 
$result = $mysqli->query($query);

$today_uk = " " . date("d/m/y");

while($row = $result->fetch_array()) 
{ $rows[] = $row; }

echo "<h2>tips for" .$today_uk. "</h2>";

foreach($rows as $row) 
{ 
$date = $row['date'];
$date = date("d/m/y", strtotime($date));
$horse = $row['horse'];
$time = $row['time'];
$course = $row['course'];

echo  
'<div style= "width:600px; font-family:verdana;">
 <div style="float:left; width:400px; margin-bottom:10px; margin-top10px;">

        '.$row['course']. "-" .$row['time'] . "-" . $row['horse'] .'
 </div>' ;
}

$result->close();
$mysqli->close(); 

?>

Answer 1

我猜你可以在另一個語句中嵌套一個 foreach 語句。

所以……

$query = "SELECT course, FROM dailytips WHERE date = $today ORDER BY course, time";
while($row = $result->fetch_array()) 
{ $rows[] = $row; }

echo "<h2>tips for" .$today_uk. "</h2>";

foreach($rows as $row) {
   $query = "SELECT horse, time, date FROM dailytips WHERE course = $row['course'];
   while($row = $result->fetch_array()) 
   { $rowDetail[] = $rowDetails; }

   foreach($rows as $row) { 
       $date = $row['date'];
       $date = date("d/m/y", strtotime($date));
       $horse = $row['horse'];
       $time = $row['time'];
       $course = $row['course'];

       echo  
          '<div style= "width:600px; font-family:verdana;">
          <div style="float:left; width:400px; margin-bottom:10px; margin-top10px;">

          '.$row['course']. "-" .$row['time'] . "-" . $row['horse'] .'
          </div>' ;
      }
   }

我會考慮將你的結果放在一個與 DIV 相對的表格中，因為這似乎更適合你想要做得更好的事情。 在循環之前設置表格並在退出循環后關閉。