.htaccess routing and mvc

PHP
1

Before I start to learn a framework like Laravel, I’m doing some learning on how a mvc framework should work. This is my file structure on my localhost

  • app (this filder contain the model, view etc)
  • public (this folder contain the index.php file and template files)

In the index.php I’ve got the following code

defined('KM_APPLICATION_PATH') || define('KM_APPLICATION_PATH',realpath(dirname(__FILE__) . '/../app'));
defined('KM_DS') || define('KM_DS', DIRECTORY_SEPARATOR);
require_once KM_APPLICATION_PATH . KM_DS . 'km-config' . KM_DS . 'km-config.php';
$km_page  = km_get_url('km-page','home');
$km_models = KM_MODELS_PATH . $km_page . '.php';
$km_views  = KM_VIEWS_PATH . $km_page . '.php';

if(file_exists($km_models)){

    require_once $km_models;

}else{

    require_once KM_ERROR_404;

}

if(file_exists($km_views)){

    $main_content = $km_views;

}else{

    require_once KM_ERROR_404;

}

include KM_VIEWS_PATH. 'layout.php';

and this is the function km_get_url

function km_get_url($km_page, $km_default_page=''){

    if(isset($_REQUEST[$km_page])){
        return $_REQUEST[$km_page];
    }else{
        return $km_default_page;
    }

}

I’ve created a controller and view for login page and it works fine if call it in the url as www.mysite.com/?km-page=km-login

How can i use .htaccess to make the url looking nicer for exmaple www.mysite.com/km-login

I’ve tried with

<IfModule mod_rewrite.c>    
RewriteEngine on
RewriteBase /public
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^(.*)$ index.php?km-page=$1 [L,QSA]

</IfModule>

But i get a php notice error saing PHP Notice: Undefined variable: main_content and also include(): Filename cannot be empty inside the layout.php file where i call the variable $main_content. I believe it is because the function km_get_url doesn’t work properply maybe?

Do you have a solution to this problem? Many thanks

2

The easiest way to know what’s going wrong is by checking what data your application is using and see if it matches your expectations.

To that I end I would suggest add var_dump($_GET); as the very first line in your index.php, then visit the site and check the value of km-page.

3

You can do some of this with htaccess but it is rather limited and you end up being tied to apache. This might be a good time to introduce a router component. Router’s can give you pretty url’s using php only. And if you really want then you can write your own just to see how they work.

4

I usually create the following DEBUG function in my index.php file because once created it is easier to type than var_dump(…)


/* 
  usage: 
    fred( $val );  // print_r($val ) and styled
    fred( $val, tru3 );  // var_dump($val ) and styled
*/
function fred($val=NULL, $vd=FALSE)
{
// PRE adds linefeeds and styling to 
echo '<pre style="width:88%; margin:1em auto; background-color:#ff0; color: #000; text-align:left: padding:0.42em;">';
if($vd):
  var_dump($val);
else:
  print_r($val);
endif;
echo '</pre>';

}///

Also useful for tracing is `echo __LINE__; die;` // halts exection
5

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