如何使用PHP變量爲MYSQL準備查詢字符串？

Question

我有這個查詢，在phpmyadmin工作，但不工作在PHP。任何替代方案？

$servername = "localhost"; 
$username = "user"; 
$password = "password"; 
$dbname = "dbname"; 
$conn = new mysqli($servername, $username, $password, $dbname); 
if ($conn->connect_error) {die("Connection failed: " . $conn->connect_error);} 

$champname = 'name'; 

$sql = "SELECT column1, column2, column3, column4, column5 
FROM champions 
WHERE champion = '$champname' ORDER BY ID DESC LIMIT 1"; 

$result = $conn->query($sql); 
$row = $result->fetch_assoc(); 

任何幫助將高度讚賞

我猜'$champname'是這裏的問題。

Answer 1

試試這個

$sql = "SELECT column1, column2, column3, column4, column5 
FROM champions 
WHERE champion = $champname ORDER BY ID DESC LIMIT 1"; 

或

$sql = "SELECT column1, column2, column3, column4, column5 
FROM champions 
WHERE champion = `$champname` ORDER BY ID DESC LIMIT 1"; 

Answer 2

$ SQL = 「選擇列1，列2，欄3，column4，column5 FROM冠軍 WHERE冠軍=「」。$ champname。「'ORDER BY ID DESC LIMIT 1」;