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Sanitizing user inputs or removing HTML tags from strings is a common requirement in web development to prevent cross-site scripting (XSS) vulnerabilities and ensure data integrity.

In this tutorial, we’ll explore methods to remove HTML tags from a string within a CodeIgniter 4 application, ensuring secure and sanitized data processing.

We will use a PHP Function for this i.e PHP strip_tags() Function. The strip_tags() function strips a string from HTML, XML, and PHP tags.

Let’s get started.

CodeIgniter 4 Installation

To create a CodeIgniter 4 setup run this given command into your shell or terminal. Please make sure composer should be installed.

composer create-project codeigniter4/appstarter codeigniter-4

Assuming you have successfully installed application into your local system.

Environment (.env) Setup

When we install CodeIgniter 4, we will have env file at root. To use the environment variables means using variables at global scope we need to do env to .env

Either we can do via renaming file as simple as that. Also we can do by terminal command.

Open project in terminal

cp env .env

Above command will create a copy of env file to .env file. Now we are ready to use environment variables.

Enable Development Mode

CodeIgniter starts up in production mode by default. You need to make it in development mode to see any error if you are working with application.

Open .env file from root.

# CI_ENVIRONMENT = production

 // Do it to 
 
CI_ENVIRONMENT = development

Now application is in development mode.

How To Remove HTML Tags From View File

Back to project terminal and run this command to create a controller file.

$ php spark make:controller Site --suffix

Above command will create a file i.e SiteController.php inside /app/Controllers folder.

Open SiteController.php and write this code into it.

<?php

namespace App\Controllers;

use App\Controllers\BaseController;

class SiteController extends BaseController
{
	public function index()
	{
		$tagsString = "Hi, Welcome To Online Web Tutor. <h1>Nice</h1>, Nice to <p>meet</p> you.";
  
        return view("data", compact("tagsString"));
	}
}

Create Template File

Go to /app/Views folder and create a file with name data.php

Open data.php and write this complete code into it.

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>CodeIgniter 4 How To Remove HTML Tags From String Tutorial</title>
</head>
<body>
  
    <h3>CodeIgniter 4 How To Remove HTML Tags From String Tutorial</h3>
  
    <?php echo strip_tags($tagsString); ?>
  
</body>
</html>

Output

That’s it.

We hope this article helped you to learn CodeIgniter 4 How To Remove HTML Tags From String Tutorial in a very detailed way.

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