警告:mysqli_free_result() 期望参数 1 是 mysqli_result，给定的布尔值
为什么我会收到此错误消息:
Why am I getting this error message:
警告:mysqli_free_result() 期望参数 1 是 mysqli_result，给出布尔值
Warning: mysqli_free_result() expects parameter 1 to be mysqli_result, boolean given
我的代码是:
$statement = "INSERT INTO table1 (data1, data2) VALUES ('$variable1', '$variable2')";
if ($result = mysqli_query($conn,$statement)) {
echo "New record added successfully";
} else {
echo "Error adding records: " . $result . "<br>" . mysqli_error($conn);
}
echo "Adding records finished. ";
mysqli_free_result($result);
推荐答案
如中所述mysqli_query 手册:
失败时返回 FALSE.对于成功的 SELECT、SHOW、DESCRIBE 或 EXPLAIN 查询，mysqli_query() 将返回一个 mysqli_result 对象.对于其他成功的查询，mysqli_query() 将返回 TRUE.
Returns FALSE on failure. For successful SELECT, SHOW, DESCRIBE or EXPLAIN queries mysqli_query() will return a mysqli_result object. For other successful queries mysqli_query() will return TRUE.
您的插入查询将返回 true 或 false，但不会返回对象.因此，调用 mysqli_free_result 在这里不起作用.
Your insert query will return true or false, but not an object. So, calling mysqli_free_result will not work here.
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