php - $ROW = 未定义？

Question

我得到了

"Undefined variable: row" for the following code at the " return ($row);"

$ROW 不是定义在 $ROW[] = Array(...) 吗？

 <?php
    function fetchImageState(){
        $state = $_GET['state'];
        global $mysqli,$db_table_prefix;
        $stmt = $mysqli->prepare("SELECT athletedetails.UserID,
    	athletedetails.State_Code,
    	filesrepository.user_id,
    	filesrepository.new_file_name,
    	filesrepository.file_ID
    FROM athletedetails INNER JOIN filesrepository ON athletedetails.UserID = filesrepository.user_id
    WHERE athletedetails.State_Code = '$state'
      ");
        $stmt->execute();
        $stmt->bind_result($UserID, $statecode, $user, $file_id, $new_file_name);
        while ($stmt->fetch()){
            $row[] = array(
                'userID' => $UserID,
                'state' => $statecode,
                'user' => $user,
                'fileid' => $file_id,
                'newfilename' => $new_file_name);
        }
        $stmt->close();
        return ($row);
    }
?>

Answer 1

$row需要在while语句之前定义。目前只存在于while语句范围内，返回前销毁。

注意 $row 可能不包含您期望返回的值。但我也不经常使用 PHP，但可能会。