用逗号分隔关联数组的值

Question

有没有比这个更好的方法来分隔数组的值？

<?php 
    $q = "SELECT * FROM students LEFT JOIN Groepen ON Groepen.groep_id=students.groep WHERE students.uid = '$user[uid]'AND students.groep = '$groep[groep_id]' ORDER BY st_last ASC";
    $r = mysqli_query($dbc, $q);

    while($students_in_group = mysqli_fetch_assoc($r)) {
?>

<?php echo $students_in_group['st_first']." ".$students_in_group['st_last'].", "; ?>
<?php } ?> </p>

上面的代码还在姓氏后面添加了一个逗号。

我还想使用 $students_in_group[email] 向组的所有成员发送电子邮件。 我想在那里我也必须分开他们的电子邮件地址？

Answer 1

在while()循环中，在数组中添加/追加名称。 然后退出循环后，使用implode()函数将名称与逗号连接起来，如下所示：

<?php 
    $q = "SELECT * FROM students LEFT JOIN Groepen ON Groepen.groep_id=students.groep WHERE students.uid = '$user[uid]'AND students.groep = '$groep[groep_id]' ORDER BY st_last ASC";
    $r = mysqli_query($dbc, $q);
    $names = array();
    while($students_in_group = mysqli_fetch_assoc($r)) { 
        $names[] = $students_in_group['st_first']." ".$students_in_group['st_last'];
    } 
    echo implode(",", $names);
?>