检查 mysqli_query 是否返回任何值?

Checking if mysqli_query returned any values?(检查 mysqli_query 是否返回任何值?)

问题描述

我有以下代码，我想知道 mysqli_query 是否返回任何行，如果返回则返回错误.

I have the following code and I would like to know if mysqli_query returned any rows and if so return an error.

$result = mysqli_query($connection, "SELECT * FROM users");
    
if ($result == "") {
    echo "No records found";
} else {
    echo "There is at least one record in the database";
}

如果结果返回为空，我就会遇到麻烦.我已经尝试使用了几种东西，但如果没有找到任何东西，我无法弄清楚如何让它正常工作.

I'm having trouble if the results come back as empty. I've tried using several things and can't figure out how to get it work correctly if nothing is found.

推荐答案

使用 mysqli_num_rows 检查是否有任何行返回.

Use mysqli_num_rows to check if any rows were returned or not.

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