FastSitePHP | 连接到数据库并运行SQL语句

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此页面使用带有SQL的数据库来保存和显示最近的页面浏览量和HTTP请求.
使用控件提交其他请求,或使用其他浏览器或开发工具尝试此页以查看不同的用户代理.
此页的数据库示例代码和PHP代码如下表所示.
您可以通过单击表中的某一行来突出显示它.

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Id	URL	Method	Device Type	OS Type	OS	Browser	用户代理	请求日期
1465	/zh-CN/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)	2024-11-23 10:14:24
1464	/fr/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)	2024-11-22 19:58:36
1463	/ar/examples/database-demo	GET	Bot	Android	Android 6.0.1	Chrome	Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.85 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)	2024-11-22 16:13:23
1462	/zh-CN/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)	2024-11-22 16:09:56
1461	/zh-CN/examples/database-demo	GET	Bot	Android	Android 6.0.1	Chrome	Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.85 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)	2024-11-22 14:57:10
1460	/es/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; ImagesiftBot; +imagesift.com)	2024-11-22 13:29:10
1459	/zh-CN/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)	2024-11-22 13:27:07
1458	/pt-BR/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)	2024-11-22 13:26:54
1457	/fr/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)	2024-11-22 13:26:41
1456	/es/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)	2024-11-22 13:26:28
1455	/en/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; ImagesiftBot; +imagesift.com)	2024-11-22 13:04:09
1454	/en/examples/database-demo	GET	Bot	Android	Android 6.0.1	Chrome	Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.85 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)	2024-11-22 13:02:58
1453	/pt-BR/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; ImagesiftBot; +imagesift.com)	2024-11-22 12:59:43
1452	/fr/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; ImagesiftBot; +imagesift.com)	2024-11-22 12:49:03
1451	/es/examples/database-demo	GET	Bot	Android	Android 6.0.1	Chrome	Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.85 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)	2024-11-22 12:47:48
1450	/ar/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; ImagesiftBot; +imagesift.com)	2024-11-22 12:33:27
1449	/en/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)	2024-11-22 11:58:11
1448	/zh-CN/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; ImagesiftBot; +imagesift.com)	2024-11-22 11:19:11
1447	/es/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)	2024-11-22 09:35:15
1446	/ar/examples/database-demo	GET	Bot	Bot			Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)	2024-11-22 09:01:27

数据库代码概述

// Connect to a Database
$db = new \FastSitePHP\Data\Database($dsn, $user, $password);

// Query for Multiple Records
// Returns an Array of Records (Associative Array for each Record).
$sql = 'SELECT * FROM pages';
$records = $db->query($sql);

// Query for one record. Returns an Associative Array or [null] if not found.
// Both [query()] and [queryOne()] support optional parameters when querying.
$sql = 'SELECT * FROM pages WHERE id = ?';
$params = [1];
$record = $db->queryOne($sql, $params);

// Use [execute()] for INSERT, UPDATE, DELETE, CREATE and other Transactions.
// In addition to using [?] you can also used named parameters in the
// format of ":name". Named parameters can make the code easier to read.
$sql = 'INSERT INTO pages (title, content)';
$sql .= ' VALUES (:title, :content)';
$params = [
    'title'   => 'Database Demo',
    'content' => '<h1>Database Demo<h1>',
];
$rows_affected = $db->execute($sql, $params);

// Many additional examples can be found on the quick reference page.

此页的PHP代码

<?php

namespace App\Controllers\Examples;

use FastSitePHP\Application;
use FastSitePHP\Data\Database;
use FastSitePHP\Lang\I18N;
use FastSitePHP\Web\Request;

class DatabaseDemo
{
    /**
     * Return HTML for the Web Page
     */
    public function get(Application $app, $lang)
    {
        // Load Language File
        I18N::langFile('database-demo', $lang);

        // Add Code Example from text file
        $file_path = $app->config['I18N_DIR'] . '/code/database-demo.{lang}.txt';
        $app->locals['i18n']['db_code'] = I18N::textFile($file_path, $app->lang);

        // Add a record for the request and get the 20 most recent records
        $records = $this->insertAndSelectRecords($app);

        // Render the View
        $templates = [
            'old-browser-warning.htm',
            'examples/database-demo.php',
            'examples/database-demo.htm',
            'table-highlighter.htm',
        ];
        return $app->render($templates, [
            'nav_active_link' => 'examples',
            'records' => $records,
            'controller_code' => file_get_contents(__FILE__),
        ]);
    }

    /**
     * JSON Service that logs requests from button clicks.
     * Returns the 20 most recent records.
     */
    public function routePage(Application $app, $lang, $color)
    {
        return ['records' => $this->insertAndSelectRecords($app)];
    }

    /**
     * Add a record for the request and return recent records
     */
    private function insertAndSelectRecords(Application $app)
    {
        $db = $this->connectToDb();
        $this->insertRecord($app, $db);
        $records = $this->getRecentRecords($db);
        return $records;
    }

    /**
     * Return a Db Connection to a SQLite Database in the Temp
     * Directory. Create the file if it doesn't yet exist.
     */
    private function connectToDb()
    {
        // Path to SQLite Db
        $path = sys_get_temp_dir() . '/database-demo.sqlite';
        $this->checkDb($path);

        // Connect and create table the first time the db is used
        $dsn = 'sqlite:' . $path;
        $db = new Database($dsn);
        $sql = <<<'SQL'
            CREATE TABLE IF NOT EXISTS requests (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    url TEXT,
                    method TEXT,
                    user_agent TEXT,
                    date_requested TIMESTAMP DEFAULT CURRENT_TIMESTAMP
            )
SQL;
        $db->execute($sql);
        return $db;
    }

    /**
     * Delete the SQLite Database every time it reaches over 10 megabytes.
     * It is intended only as a temporary database for this demo page.
     */
    private function checkDb($path) {
        if (is_file($path)) {
            $ten_megabytes = (1024 * 1024 * 10);
            $file_size = filesize($path);
            if ($file_size > $ten_megabytes) {
                unlink($path);
                // Add to a log file each time it's removed
                $log_path = sys_get_temp_dir() . '/database-demo.txt';
                $now = date(DATE_RFC2822);
                $contents = "${path} deleted at ${now}\n";
                file_put_contents($log_path, $contents, FILE_APPEND);
            }
        }
    }

    /**
     * Insert a Record for each Request
     */
    private function insertRecord(Application $app, Database $db)
    {
        $req = new Request();
        $sql = 'INSERT INTO requests (url, method, user_agent) VALUES (?, ?, ?)';
        $params = [$app->requestedPath(), $req->method(), $req->userAgent()];
        $db->execute($sql, $params);
    }

    /**
     * Return the 20 most recent records.
     * The SELECT statement is defined in a [*.sql] file,
     * which allows for easy editing and testing outside of PHP code.
     */
    private function getRecentRecords(Database $db)
    {
        $sql = file_get_contents(__DIR__ . '/../../Models/DatabaseDemo.sql');
        $records = $db->query($sql);
        return $records;
    }
}