How to minify view HTML in Codeigniter 4 (CI 4) - codeigniter

Question

I know we can minify HTML in CI3 through the hook but in CI 4
I have done it by adding a minify function before return on every method.
minifyHTML(view('admin/template/template',$this->data));
Any other way I can do it without using the minify function everywhere?
I also figure out another solution which is to add a template function in BaseConroller which renders all the views. but I have already used view() in many places in the project and its not feasible for me but can be work for others.

Answer 1

In CodeIgniter4 You can use Events to Minify the output (Instead of using Hooks like what we did in CodeIgniter3) , by adding the following code inti app/Config/Events.php file
//minify html output on codeigniter 4 in production environment
Events::on('post_controller_constructor', function () {
if (ENVIRONMENT !== 'testing') {
while (ob_get_level() > 0)
{
ob_end_flush();
}
ob_start(function ($buffer) {
$search = array(
'/\n/', // replace end of line by a <del>space</del> nothing , if you want space make it down ' ' instead of ''
'/\>[^\S ]+/s', // strip whitespaces after tags, except space
'/[^\S ]+\</s', // strip whitespaces before tags, except space
'/(\s)+/s', // shorten multiple whitespace sequences
'/<!--(.|\s)*?-->/' //remove HTML comments
);
$replace = array(
'',
'>',
'<',
'\\1',
''
);
$buffer = preg_replace($search, $replace, $buffer);
return $buffer;
});
}
});
see https://gitlab.irbidnet.com/-/snippets/3

Answer 2

You need the extend your core system classes to be able to do that in a system wide scope.
Every time CodeIgniter runs there are several base classes that are initialized automatically as part of the core framework. It is possible, however, to swap any of the core system classes with your own version or even just extend the core versions.
Two of the classes that you can extend are these two:
CodeIgniter\View\View
CodeIgniter\View\Escaper
For example, if you have a new App\Libraries\View class that you would like to use in place of the core system class, you would create your class like this:
The class declaration must extend the parent class.
<?php namespace App\Libraries;
use CodeIgniter\View\View as View;
class View implements View
{
public function __construct()
{
parent::__construct();
}
}
Any functions in your class that are named identically to the methods in the parent class will be used instead of the native ones (this is known as “method overriding”). This allows you to substantially alter the CodeIgniter core.
So in this case you can look at your system view class and just change it to return the output already compressed.
In your case You might even add an extra param so that the view function can return the output either compressed or not.
For more information about extending core classes in CodeIgniter 4 read this:
https://codeigniter.com/user_guide/extending/core_classes.html#extending-core-classes

Answer 3

In CodeIgniter 4, you can minify the HTML output of your views by using the built-in output compression library.
First, you need to enable output compression in your application's configuration file, which is located at app/Config/App.php.
Then, you need to set the compression level. You can set the compression level by changing the value of compress_output option. The possible values are:
0 : Off (Do not compress the output)
1 : On (Compress output, but do
not remove whitespace)
2 : On (Compress output, and remove
whitespace)
Finally, you need to load the Output Library in your controller, before the output is sent to the browser. You can load it using the following line of code:
$this->load->library('output');