代码语言：php

所属分类：其他

代码描述：php实现自动创建表结构的sqlite orm框架示例代码，php中的model定义表结构，无需创建sql，自动执行sql。

代码标签： php 实现 自动 创建 表结构 sqlite orm 框架 示例 代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<?php
// advanced_orm.php
// Advanced Single-File ORM for PHP 5.6 with Auto Table Creation, Joins, and Query Builder.

header('Content-Type: text/html; charset=utf-8');
error_reporting(E_ALL);
ini_set('display_errors', 1);

// --- Part 1: Database Connection Class (Singleton) ---

class Database {
    private static $instance = null;
    private $pdo;

    private function __construct() {
        try {
            $db_file = __DIR__ . '/my_advanced_database.sqlite';
            $this->pdo = new PDO('sqlite:' . $db_file);
            $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            $this->pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
        } catch (PDOException $e) {
            die("数据库连接失败 (Database connection failed): " . $e->getMessage());
        }
    }

    public static function getInstance() {
        if (self::$instance == null) {
            self::$instance = new Database();
        }
        return self::$instance;
    }

    public function getConnection() {
        return $this->pdo;
    }
}


// --- Part 2: Query Builder Class ---

class QueryBuilder {
    protected $pdo;
    protected $modelClass;
    
    protected $table;
    protected $columns = '*';
    protected $joins = array();
    protected $wheres = array();
    protected $params = array();
    protected $orderBy = '';
    protected $limit = '';

    public function __construct($modelClass) {
        $this->pdo = Database::getInstance()->getConnection();
        $this->modelClass = $modelClass;
        $this->table = $modelClass::getTableName();
    }

    public function select($columns) {
        $this->columns = is_array($columns) ? implode(', ', $columns) : $columns;
        return $this;
    }

    public function where($column, $operator, $value = null) {
        if (func_num_args() == 2) {
            $value = $operator;
            $operator = '=&.........完整代码请登录后点击上方下载按钮下载查看

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