第一种：数组
$allbrand = array();
while ($testingrow = mysqli_fetch_array ($testingquery)) {
$allbrand[] = $testingrow[2];
}
第二种：字符串
$allbrand = '';
while ($testingrow = mysqli_fetch_array ($testingquery)) {
$allbrand .= $testingrow[2]."";
}
请采纳，谢谢
第一行少了引号，应该改为：
$str="where ....'王舒婷'";
$str= "where task_is_on = '个人已完' and task_flag = '普通' and task_do_name = '王舒婷' ";
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