查询没有得到任何结果

Question

我正在让我的查询显示结果，我在 mySQL 本地有运行完全相同的查询，我得到了想要的结果，但是当它通过以下代码执行时没有任何反应.

$JobID = '3214.GF.010.J45.TEA';
$ProjectID = '3214';    
$conn = new mysqli ($server,$username,$password,$dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} 
echo "Connected successfully <br>";
$stmt = $conn->prepare('Select jmpPartShortDescription, ujmpLevel, ujmpRoom, jmpClosed from Inf_Jobs');
//$stmt->bind_param('ss',$JobID,$ProjectID);
$stmt -> bind_result($Description,$Level,$Room,$Closed);
$stmt -> fetch();
$stmt -> close();
$conn -> close();

echo $Description .$Level .$Room .$Closed;

我不明白为什么我没有得到任何结果我收到“已连接成功”消息，但没有返回任何实际值。

Answer 1

您需要 execute() 准备好的语句才能执行任何操作。

$stmt = $conn->prepare('Select jmpPartShortDescription, ujmpLevel, ujmpRoom, jmpClosed from Inf_Jobs');
//$stmt->bind_param('ss',$JobID,$ProjectID);

$stmt->execute(); // <- this is what does the work

$stmt -> bind_result($Description,$Level,$Room,$Closed);
$stmt -> fetch();

查询没有得到任何结果

Not Getting Any Results with Query

php

mysql

bindparam