php - MySQLi 查询默默失败，但在 SQL shell 中成功

Question

我试图从 OsTicket 安装中提取一些数据，但由于某种原因，第一个 SQL 查询无提示地失败(行开头:$openTickets)。然而，当输入 MySQL shell 时，查询就会起作用。

<?php
    define('INCLUDE_DIR','dumb hack');
    require_once("./include/ost-config.php");

    $mysqli = new mysqli(DBHOST, DBUSER, DBPASS, DBNAME);
if ($mysqli->connect_error) {
    die("Couldn't Connect to MySQL Database.\nError (" . $mysqli->connect_errno . "): " . $mysqli->connect_error);
}

$openTickets = $mysqli->query("SELECT ticket_id, number, user_id FROM ost_ticket WHERE status='open'");

[...snip...]
?>

Answer 1

参见MySQLI errno

$openTickets = $mysqli->query("SELECT ticket_id, number, user_id FROM ost_ticket WHERE status='open'");
if ($openTickets === false) {
    printf("Errorcode: %d\n", $mysqli->errno);
}