code-boxx/0-PHP-STORE-HTML-MYSQL.MD

## 0-PHP-STORE-HTML-MYSQL.MD

      
    Raw
  

              0-PHP-STORE-HTML-MYSQL.MD
            
          
    PHP STORE & RETRIEVE HTML CODE IN MYSQL

https://code-boxx.com/store-retrieve-html-code-mysql-php/
NOTES


Create a dummy database and import 1-contents-table.sql.
Change the database settings in 2-lib-content.php to your own.
Run 3a-insert-html.php and 3b-retrieve-html.php in the web browser.

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-contents-table.sql
CREATE TABLE `web_contents` (
  `id` bigint(20) NOT NULL,
  `contents` text NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

ALTER TABLE `web_contents`
  ADD PRIMARY KEY (`id`);

ALTER TABLE `web_contents`
  MODIFY `id` bigint(20) NOT NULL AUTO_INCREMENT;

## 2-lib-content.php
<?php
class Content {
  // (A) CONSTRUCTOR - CONNECT TO DATABASE
  private $pdo = null;
  private $stmt = null;
  public $lastID = null;
  public $error = "";
  function __construct() {
    $this->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
    ]);
  }

  // (B) DESTRUCTOR - CLOSE DATABASE CONNECTION
  function __destruct() {
    if ($this->stmt !== null) { $this->stmt = null; }
    if ($this->pdo !== null) { $this->pdo = null; }
  }

  // (C) HELPER - EXECUTE SQL QUERY
  function exec ($sql, $data=null) : void {
    $this->stmt = $this->pdo->prepare($sql);
    $this->stmt->execute($data);
  }

  // (D) SAVE CONTENT
  function save ($html) {
    $this->exec("INSERT INTO `web_contents` (`contents`) VALUES (?)", [$html]);
    return true;
  }

  // (E) LOAD CONTENT
  function load ($id) {
    $this->exec("SELECT `contents` FROM `web_contents` WHERE `id`=?", [$id]);
    return $this->stmt->fetchColumn();
  }
}

// (F) DATABASE SETTINGS - CHANGE THESE TO YOUR OWN
define("DB_HOST", "localhost");
define("DB_NAME", "test");
define("DB_CHARSET", "utf8mb4");
define("DB_USER", "root");
define("DB_PASSWORD", "");

// (G) CONTENT OBJECT
$_CONTENT = new Content();

## 3a-insert-html.php
<?php
// (A) LOAD CONTENT LIBRARY
require "2-lib-content.php";

// (B) INSERT HTML
echo $_CONTENT->save("<strong>HELLO WORLD</strong>")
  ? "OK" : "ERROR" ;

## 3b-retrieve-html.php
<?php
// (A) LOAD CONTENT LIBRARY
require "2-lib-content.php";

// (B) OUTPUT HTML ?>
<!DOCTYPE html>
<html>
  <head>
    <title>MYSQL HTML DEMO</title>
    <meta charset="utf-8">
  </head>
  <body>
    <?=$_CONTENT->load(1)?>
  </body>
</html>

## 3c-html-entity.php
<?php
// (A) LOAD CONTENT LIBRARY
require "2-lib-content.php";

// (B) RETRIEVE HTML - CONVERT HTML ENTITIES
$html = htmlentities($_CONTENT->load(1));

// (C) OUTPUT HTML ?>
<!DOCTYPE html>
<html>
  <head>
    <title>MYSQL HTML DEMO</title>
    <meta charset="utf-8">
  </head>
  <body>
    <textarea><?=$html?></textarea>
    <code><?=$html?></code>
  </body>
</html>

## 4-strip-tag.php
<?php
// (A) LOAD CONTENT LIBRARY
require "2-lib-content.php";

// (B) HTML SNIPPET WITH SCRIPT
$html = "<p>Hi!</p> <script>alert('FOO')</script>";

// (C) ALLOW ONLY "P" TAGS
$html = strip_tags($html, ["p"]);

// (D) SAVE INTO DATABASE
echo $_CONTENT->save($html)
  ? "OK" : "ERROR" ;
	CREATE TABLE `web_contents` (
	`id` bigint(20) NOT NULL,
	`contents` text NOT NULL
	) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

	ALTER TABLE `web_contents`
	ADD PRIMARY KEY (`id`);

	ALTER TABLE `web_contents`
	MODIFY `id` bigint(20) NOT NULL AUTO_INCREMENT;
	<?php
	class Content {
	// (A) CONSTRUCTOR - CONNECT TO DATABASE
	private $pdo = null;
	private $stmt = null;
	public $lastID = null;
	public $error = "";
	function __construct() {
	$this->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
	]);
	}

	// (B) DESTRUCTOR - CLOSE DATABASE CONNECTION
	function __destruct() {
	if ($this->stmt !== null) { $this->stmt = null; }
	if ($this->pdo !== null) { $this->pdo = null; }
	}

	// (C) HELPER - EXECUTE SQL QUERY
	function exec ($sql, $data=null) : void {
	$this->stmt = $this->pdo->prepare($sql);
	$this->stmt->execute($data);
	}

	// (D) SAVE CONTENT
	function save ($html) {
	$this->exec("INSERT INTO `web_contents` (`contents`) VALUES (?)", [$html]);
	return true;
	}

	// (E) LOAD CONTENT
	function load ($id) {
	$this->exec("SELECT `contents` FROM `web_contents` WHERE `id`=?", [$id]);
	return $this->stmt->fetchColumn();
	}
	}

	// (F) DATABASE SETTINGS - CHANGE THESE TO YOUR OWN
	define("DB_HOST", "localhost");
	define("DB_NAME", "test");
	define("DB_CHARSET", "utf8mb4");
	define("DB_USER", "root");
	define("DB_PASSWORD", "");

	// (G) CONTENT OBJECT
	$_CONTENT = new Content();
	<?php
	// (A) LOAD CONTENT LIBRARY
	require "2-lib-content.php";

	// (B) OUTPUT HTML ?>
	<!DOCTYPE html>
	<html>
	<head>
	<title>MYSQL HTML DEMO</title>
	<meta charset="utf-8">
	</head>
	<body>
	<?=$_CONTENT->load(1)?>
	</body>
	</html>