php - 通过PHP调用MySQL存储过程

Question

我已经安装了 XAMPP，并尝试使用 PHP 查询我的数据库，尽管我不断收到相同的错误。

<?php
$servername = "localhost";
$username = "root";
$password = "secret";

// Create connection
$conn = new mysqli($servername, $username, $password);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

// Perform queries 
$result = mysqli_query($conn, 
    "use edgeserver; call ShowAll") or die("Query fail: " . mysqli_error());

  //loop the result set
while ($row = mysqli_fetch_array($result)){   
     echo $row[0] . " - " . + $row[1]; 
  }

$conn->close();

?>

但是这给我带来了以下错误:

Warning: mysqli_error() expects exactly 1 parameter, 0 given in C:\xampp\htdocs\amit\ShowAll.php on line 16
Query fail:

Answer 1

Mysql_error 需要传递数据库连接。请尝试以下操作:

mysqli_error($conn);