code-boxx/0-PHP-CACHE-DYNAMIC.MD

## 0-PHP-CACHE-DYNAMIC.MD

      
    Raw
  

              0-PHP-CACHE-DYNAMIC.MD
            
          
    PHP CACHE DYNAMIC HTML PAGES

https://code-boxx.com/cache-dynamic-pages-php/
NOTES


Create a database and import 1-content.sql.
Change the database settings to your own in 3-dynamic.php.
Access 4-cache.php in your web browser, this will generate a static cached-1.html on the first load.
Following visits to 4-cache.php will load the static HTML instead of generating dynamically.

LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-content.sql
-- (A) CONTENT TABLE
CREATE TABLE `content` (
  `content_id` bigint(20) NOT NULL,
  `content_title` varchar(255) NOT NULL,
  `content_body` longtext NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

ALTER TABLE `content`
  ADD PRIMARY KEY (`content_id`);

ALTER TABLE `content`
  MODIFY `content_id` bigint(20) NOT NULL AUTO_INCREMENT;

-- (B) DUMMY CONTENT
INSERT INTO `content` (`content_id`, `content_title`, `content_body`) VALUES
(1, 'Hello World!', '<p>This is a <strong>test page</strong>.</p>\r\n<p>Saved in a database.</p>\r\n<p>Dynamically generated page.</p>\r\n<p>Some random text.</p>');

## 2a-page-top.php
<!DOCTYPE html>
<html>
  <head>
    <title><?=$_PAGE["content_title"]?></title>
    <meta charset="utf-8">
  </head>
  <body>
    <header>My Site</header>
    <main>
      <h1><?=$_PAGE["content_title"]?></h1>
      <?=$_PAGE["content_body"]?>
    </main>

## 3-dynamic.php
<?php
// (A) DATABASE SETTINGS - CHANGE TO YOUR OWN
define("DB_HOST", "localhost");
define("DB_NAME", "test");
define("DB_CHARSET", "utf8mb4");
define("DB_USER", "root");
define("DB_PASSWORD", "");

// (B) CONNECT TO DATABASE
$pdo = new PDO(
  "mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET,
  DB_USER, DB_PASSWORD, [
  PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
  PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
]);

// (C) GET CONTENT FROM DATABASE
$id = 1; // CONTENT ID 1
$stmt = $pdo->prepare("SELECT * FROM `content` WHERE `content_id`=?");
$stmt->execute([$id]);
$_PAGE = $stmt->fetch();

// (D) GENERATE HTML PAGE
require "2a-page-top.php";
require "2b-page-bottom.php";

## 4-cache.php
<?php
// (A) SERVE STATIC HTML IF EXIST
$id = 1; // CONTENT ID 1
$file = "cached-$id.html";
if (file_exists($file)) {
  // echo "THIS IS A CACHED COPY!";
  require $file;
}

// (B) GENERATE HTML FILE
else {
  // (B1) START OUTPUT BUFFERING
  ob_start();

  // (B2) GENERATE HTML PAGE
  require "3-dynamic.php";

  // (B3) SAVE BUFFER INTO STATIC HTML
  file_put_contents($file, ob_get_contents());

  // (B4) OUTPUT CONTENTS
  ob_end_flush();
}

## gistfile1.txt
    <footer>Copyright, My Site.</footer>
  </body>
</html>
	-- (A) CONTENT TABLE
	CREATE TABLE `content` (
	`content_id` bigint(20) NOT NULL,
	`content_title` varchar(255) NOT NULL,
	`content_body` longtext NOT NULL
	) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

	ALTER TABLE `content`
	ADD PRIMARY KEY (`content_id`);

	ALTER TABLE `content`
	MODIFY `content_id` bigint(20) NOT NULL AUTO_INCREMENT;

	-- (B) DUMMY CONTENT
	INSERT INTO `content` (`content_id`, `content_title`, `content_body`) VALUES
	(1, 'Hello World!', '<p>This is a <strong>test page</strong>.</p>\r\n<p>Saved in a database.</p>\r\n<p>Dynamically generated page.</p>\r\n<p>Some random text.</p>');
	<!DOCTYPE html>
	<html>
	<head>
	<title><?=$_PAGE["content_title"]?></title>
	<meta charset="utf-8">
	</head>
	<body>
	<header>My Site</header>
	<main>
	<h1><?=$_PAGE["content_title"]?></h1>
	<?=$_PAGE["content_body"]?>
	</main>
	<?php
	// (A) DATABASE SETTINGS - CHANGE TO YOUR OWN
	define("DB_HOST", "localhost");
	define("DB_NAME", "test");
	define("DB_CHARSET", "utf8mb4");
	define("DB_USER", "root");
	define("DB_PASSWORD", "");

	// (B) CONNECT TO DATABASE
	$pdo = new PDO(
	"mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET,
	DB_USER, DB_PASSWORD, [
	PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
	PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
	]);

	// (C) GET CONTENT FROM DATABASE
	$id = 1; // CONTENT ID 1
	$stmt = $pdo->prepare("SELECT * FROM `content` WHERE `content_id`=?");
	$stmt->execute([$id]);
	$_PAGE = $stmt->fetch();

	// (D) GENERATE HTML PAGE
	require "2a-page-top.php";
	require "2b-page-bottom.php";
	<?php
	// (A) SERVE STATIC HTML IF EXIST
	$id = 1; // CONTENT ID 1
	$file = "cached-$id.html";
	if (file_exists($file)) {
	// echo "THIS IS A CACHED COPY!";
	require $file;
	}

	// (B) GENERATE HTML FILE
	else {
	// (B1) START OUTPUT BUFFERING
	ob_start();

	// (B2) GENERATE HTML PAGE
	require "3-dynamic.php";

	// (B3) SAVE BUFFER INTO STATIC HTML
	file_put_contents($file, ob_get_contents());

	// (B4) OUTPUT CONTENTS
	ob_end_flush();
	}