逗号需要从最后一个循环中删除

Question

我的while循环有问题，每个项目都需要有一个逗号，但最后一个不需要一个，但我不知道我需要做什么...

 while($row = $result->fetch_assoc()) { 
     echo " 
     { 
      id: " . $row['id'] . ", 
      dexNr: " . $row['mon_id'] . ", 
      name: '" . $row['mon_id'] . "', 
      expiration: " . $row['expire_timestamp'] . ", 
      lat: " . $row['lat'] . ", 
      lng: " . $row['lon'] . " 
     }, 
     "; 
    } 

Answer 1

您可以将每个项目推入一个数组，然后用逗号分解它。然后这只会在项目之间加逗号，但不会在结尾：

$output = array(); 

while($row = $result->fetch_assoc()) { 
    array_push($output, " 
     { 
     id: " . $row['id'] . ", 
     dexNr: " . $row['mon_id'] . ", 
     name: '" . $row['mon_id'] . "', 
     expiration: " . $row['expire_timestamp'] . ", 
     lat: " . $row['lat'] . ", 
     lng: " . $row['lon'] . " 
     } 
    "); 
} 

$output = implode(",", $output);