PHP和Typecho实现数据管理的最佳实践

<?php
$servername = "localhost";  //数据库服务器地址
$username = "root";  //数据库用户名
$password = "password";  //数据库密码
$dbname = "database";  //数据库名称

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检测连接是否成功
if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}
echo "连接成功";
?>

<?php
$sql = "SELECT * FROM table_name";  //要查询的数据库表和字段

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

if ($result->num_rows > 0) {
  while($row = $result->fetch_assoc()) {
    echo "字段1: " . $row["column1"]. " - 字段2: " . $row["column2"]. "<br>";
  }
} else {
  echo "没有数据";
}
$conn->close();
?>

<?php
$sql = "INSERT INTO table_name (column1, column2, column3)
VALUES ('value1', 'value2', 'value3')";

if ($conn->query($sql) === TRUE) {
  echo "数据插入成功";
} else {
  echo "数据插入失败: " . $conn->error;
}
$conn->close();
?>

<?php
$sql = "UPDATE table_name SET column1='new_value' WHERE condition";

if ($conn->query($sql) === TRUE) {
  echo "数据更新成功";
} else {
  echo "数据更新失败: " . $conn->error;
}
$conn->close();
?>

<?php
$sql = "DELETE FROM table_name WHERE condition";

if ($conn->query($sql) === TRUE) {
  echo "数据删除成功";
} else {
  echo "数据删除失败: " . $conn->error;
}
$conn->close();
?>