PHP: String HH:MM:SS to hours (float)

Hello,

How to parse string with format HH:MM:SS to hours:

$string = '01:58:03';
sscanf($string, "%d:%d:%d",  $hours, $minutes, $seconds);
$hours = $hours + $minutes/60 + $seconds/3600;

Best regards!
 

Laravel 5.2: Create multilang site (Session+Middleware)

Hello,

How to create a multi-language site in Laravel 5.2:

config/app.php

'locale' => 'ca',
'locales' => ['ca' => 'Català', 'es' => 'Español', 'en' => 'English'],

app/Http/routes.php

Route::group(['middleware' => ['web']], function () {
    Route::get('/', [
        'as' => 'underconstruction', 'uses' => 'Underconstruction\UnderconstructionController@showIndex'
    ]);
    Route::get('/lang/{langcode?}', function ($langcode = 'ca') {
        return redirect()->route('underconstruction');
    });
});

app/Http/Kernel.php

/**
     * The application's route middleware groups.
     *
     * @var array
     */
    protected $middlewareGroups = [
        'web' => [
            \App\Http\Middleware\EncryptCookies::class,
            \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
            \Illuminate\Session\Middleware\StartSession::class,
            \Illuminate\View\Middleware\ShareErrorsFromSession::class,
            \App\Http\Middleware\VerifyCsrfToken::class,
            \App\Http\Middleware\LangMiddleware::class,
        ],

        'api' => [
            'throttle:60,1',
        ],
    ];

/app/Http/Middleware/LangMiddleware.php

<?php

namespace App\Http\Middleware;

use Closure;
use App;

class LangMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $lang = $request->segment(1);
        $locale = $request->segment(2);

        if ($lang == 'lang' && array_key_exists($locale, app()->config->get('app.locales'))) {
            $request->session()->put('locale', $locale);
        } else if ($request->session()->has('locale')) {
            App::setLocale($request->session()->get('locale'));
        }

        return $next($request);
    }
}

/app/Http/Controllers/Underconstruction/UnderconstructionController.php

<?php

namespace App\Http\Controllers\Underconstruction;

use App\Http\Controllers\Controller as Controller;

class UnderconstructionController extends Controller
{
    public function showIndex() {
        return app()->getLocale();
    }
}

If you access to http://yourweb/ --> lang = ca
if you access to http://yourweb/lang/es --> lang = es
If you access to http://yourweb/ --> lang =es

Lang is saved in session data.

Best regards,
Iban Cardona.

Init class of a unnamed namespace inside other namespace

Hello,

How to init a class without namespace in another class with namespace:

<?php

class first_class {
   public function  __construct() {
   }
}

And:

<?php

namespace namespace1\namespace2;

class second_class {
         public function  __construct() {
         }

         public function test() {
                $object = first_class(); --> ERROR!!!!
                $object = \first_class(); --> OK
         }
}

Best regards!

Moodle: Get courses recursively

Hello,

How to get all courses of a category recursively?

<?php

global $CFG;
require_once($CFG->dirroot . '/lib/coursecatlib.php');
$categoryid = 1;
$allcourses = coursecat::get($categoryid)->get_courses(array('recursive' => true));

How to get all courses of a hidden category?

<?php

global $CFG;
require_once($CFG->dirroot . '/lib/coursecatlib.php');
$categoryid = 1;
$allcourses = coursecat::get($categoryid, MUST_EXIST, true)->get_courses(array('recursive' => true));

Best regards!

PHP : How to access to an object variable whose name is another variable of the object

Hello,

If we suppose that:

<?php
class test_class
{
       private $variable_name = 'id';
       private $id  = 0;
}

How to acces to variable 'id' inside an instance? :

<?php

class test_class
{
       private $variable_name = 'id';
       private $id  = 0;

       function test() {
             echo $this->$this->variable_name;  // ERROR!!!!
             echo $this->{$this->variable_name};
       }
}

$object = new test_class();
$object->test();

Best regards!

Moodle: Create zip file with all course resources

Hello,

How to create a zip file with all resource modules of a course:

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

require_once('../../config.php');

$id = required_param('id', PARAM_INT);

$course = get_course($id);
if (!$course) {
    die();
}

$context = context_course::instance($course->id);

require_login($course);

$filename = 'contents.zip';
$new_names = array();

// Get files resources
$query_resources = "SELECT {resource}.*
FROM {resource}, {course_modules}, {modules}
WHERE {course_modules}.instance = {resource}.id
AND {modules}.id = {course_modules}.module
AND {modules}.name = 'resource'
AND {resource}.course = ?
AND {course_modules}.course = ?";
$resources = $DB->get_records_sql($query_resources, array($course->id, $course->id));

foreach ($resources as $resource) {
    $cm = get_coursemodule_from_instance('resource', $resource->id, $resource->course, false, MUST_EXIST);
    $context_resource = context_module::instance($cm->id);
    $fs = get_file_storage();
    
    $resource_files = $fs->get_area_files($context_resource->id, 'mod_resource', 'content', 0, 'sortorder DESC, id ASC', false);
    if (count($resource_files) < 1) continue;
    
    $resource_file = reset($resource_files);
    unset($resource_files);
    
    $contenthash = $resource_file->get_contenthash();
    $l1 = $contenthash[0].$contenthash[1];
    $l2 = $contenthash[2].$contenthash[3];
    $filedir = ((isset($CFG->filedir))) ? $CFG->filedir : $CFG->dataroot.'/filedir';
    $path = "$filedir/$l1/$l2/$contenthash";
    
    $new_names['/'.$resource->name.'/'.$resource_file->get_filename()] = $path;
}
// End get files resources

// Create zip file
$packer = get_file_packer('application/zip');
$fs = get_file_storage();
$result = $packer->archive_to_storage($new_names, $context->id, 'local_zip', 'zip_files', 0, '/', $filename);
// End Create zip file

print_r($result);

Best regards,
Iban Cardona.

Moodle: Use config.php vars (CFG) loading minimum data

Hello,

Sometimes, in a custom moodle script or in your local plugin you need $CFG vars but you don't need all moodle features.
The best option is write:

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

define('NO_DEBUG_DISPLAY', true);
define('ABORT_AFTER_CONFIG', true);
require_once('../../config.php');

...

With this code, you could, for example, execute echo $CFG->dbhost

Best regards,
Iban Cardona.