PHP OO DB連接

Question

什麼是線的作用/宗旨：

$db->next_result(); 

如果我刪除行，我得到了相同的輸出/結果。

<?php 
$mysqli = new mysqli("localhost", "user", "pass", "db"); 

/* check connection */ 
if ($mysqli->connect_errno) { 
    printf("Connect failed: %s\n", $mysqli->connect_error); 
    exit(); 
} 

if ($result=$mysqli->query("SELECT * FROM `users`")) { 
    printf("Successfully queried.\n"); 
} 

if($result){ 

    while ($row=$result->fetch_object()){ 
     print_r($row); 
    } 

    // Free result set 
    $result->close(); 
    $db->next_result(); 

} 

else echo($db->error); 

$mysqli->close(); 

?> 

Answer 1

從php文檔

mysqli::next_result -- mysqli_next_result — Prepare next result from multi_query