Question

好，所以我可以使用我的php代码连接和查看数据库，但是我无法将数据插入到它。我使用phpmyadmin测试的查询能够将新数据插入到我的表中

INSERT INTO `members` ( `id` , `username` , `email` ) 
VALUES ( 123456789, 'russi', 'baka@dog.com' )

然后我试着将它放入我的实际php文件

<?php
$servername = "localhost";
$username = "root";
$password = "blablabla";
$dbname = "test_database";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
$sql = "INSERT INTO 'members' ('id', 'username', 'email')
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor@bloody.com')";
$sql = "SELECT id, username, email FROM members";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "id: " . $row["id"]. " - username: " . $row["username"]. " -email:" . $row["email"]. "<br>";
    }
} else {
    echo "0 results";
}
$conn->close();
?>

所以选择函数有效但插入没有。

Answer 1

删除列和表名称周围的单引号：

$sql = "INSERT INTO members (id, username, email)
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor@bloody.com')";

单引号仅用于char字段。

此外，您永远不会执行insert语句，因为您会覆盖它。

Answer 2

$sql = "INSERT INTO 'members' ('id', 'username', 'email')
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor@bloody.com')";
$sql = "SELECT id, username, email FROM members";
//missing the grave accent 
$sql = "INSERT INTO `members` (id, username, email)
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor@bloody.com')";  

$sql = "SELECT `id`, `username`, `email` FROM `members`";

/* This is the corrrected code */

无法使用php

2 个答案: