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$cache = app("cache");
app("cache"")
and expect a Cache\Repository
instance as result. If I pass the result of this call to a function that requires a Cache\Repository
as parameter, I will probably have a code inspection warning from IDE. Moreover, if I want proper autocompletion, I will have to add additional comment:
$cache = app("cache");
namespace App;
class MyApp extends Application
{
public function cacheRepository(): Repository
{
return $this->make(Repository::class);
}
}
TypeError
in case of a misconfiguration, and I have a type-hint which allows the IDE to recognize the return value. Bye-bye nasty comment lines and IDE warnings! I make a method per service, with type-hints, like dbConnection()
or viewFactory()
- works really well for me!bootstrap/app.php
, should reside in that custom class:namespace App;
class MyApp extends Application
{
public function __construct()
{
define('LARAVEL_START', microtime(true));
define("APP_ROOT", realpath(__DIR__ . "/../"));
parent::__construct(APP_ROOT);
$this->setUp();
}
private function setUp()
{
$this->singleton(
Contracts\Http\Kernel::class,
\App\Http\Kernel::class
);
}
}
bootstrap/app.php
becomes just this:return new \App\MyApp;
app()
function will also return an instance of MyApp from now on. However, it's @phpdoc says it returns \Illuminate\Foundation\Application
, so for better clarity, I also added my own accessor method:namespace App;
class MyApp extends Application
{
public static function app(): self
{
$ret = parent::getInstance();
return $ret;
}
}
MyApp::app()
. The IDE wil be aware of the return type due to the type-hint, so I get everything I want for clean and clear development.dompdf
package for generating the PDF file. barryvdh/laravel-dompdf
using composer package and thereafter we will add new route url with controller. Then we will create a blade file. Then after we have to just run project with serve and we can check the PDF file is for download. dompdf
. To get started, we need to download fresh Laravel 5.7 application using command, so open our terminal and run the below command in the command prompt: composer create-project --prefer-dist laravel/laravel blog
composer require barryvdh/laravel-dompdf
'providers' => [
....
Barryvdh\DomPDF\ServiceProvider::class,
],
'aliases' => [
....
'PDF' => Barryvdh\DomPDF\Facade::class,
]
Route::get('demo-generate-pdf','HomeController@demoGeneratePDF');
generatePDF()
method of route. <?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use PDF;
class HomeController extends Controller
{
public function demoGeneratePDF()
{
$data = ['title' => 'Welcome to My Blog'];
$pdf = PDF::loadView('myPDF', $data);
return $pdf->download('demo.pdf');
}
}
<!DOCTYPE html>
<html>
<head>
<title>Hi</title>
</head>
<body>
<h1>Welcome to My BLOG - {{ $title }}</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
</body>
</html>
php artisan serve
$key = ftok(__FILE__, 'A');
$queue = msg_get_queue($key);
msg_send($queue, 1, 'message, type 1');
msg_send($queue, 2, 'message, type 2');
msg_send($queue, 3, 'message, type 3');
msg_send($queue, 1, 'message, type 1');
echo "send 4 messages
";
queue-receive.php$key = ftok('queue-send.php', 'A');
$queue = msg_get_queue($key);
for ($i = 1; $i <= 3; $i++) {
echo "type: {$i}
";
while ( msg_receive($queue, $i, $msgtype, 4096, $message, false, MSG_IPC_NOWAIT) ) {
echo "type: {$i}, msgtype: {$msgtype}, message: {$message}
";
}
}
u% php queue-send.php
send 4 messages
u% php queue-receive.php
type: 1
type: 1, msgtype: 1, message: s:15:"message, type 1";
type: 1, msgtype: 1, message: s:15:"message, type 1";
type: 2
type: 2, msgtype: 2, message: s:15:"message, type 2";
type: 3
type: 3, msgtype: 3, message: s:15:"message, type 3";
while (msg_receive($queue, $i, $msgtype, 4096, $message, false, MSG_IPC_NOWAIT)) {
$key = ftok('queue-send.php', 'A');
$queue = msg_get_queue($key);
while ( msg_receive($queue, 0, $msgtype, 4096, $message) ) {
echo "msgtype: {$msgtype}, message: {$message}
";
}
$pid = pcntl_fork();
$key = ftok('queue-send.php', 'A');
$queue = msg_get_queue($key);
if ($pid == -1) {
exit;
} elseif ($pid) {
exit;
} else {
while ( msg_receive($queue, 0, $msgtype, 4096, $message) ) {
echo "msgtype: {$msgtype}, message: {$message}
";
}
}
posix_setsid();
$id = ftok(__FILE__, 'A');
$shmId = shm_attach($id);
$var = 1;
if (shm_has_var($shmId, $var)) {
$data = (array) shm_get_var($shmId, $var);
} else {
$data = array();
}
$data[time()] = file_get_contents(__FILE__);
shm_put_var($shmId, $var, $data);
$id = ftok(__DIR__ . '/shared-memory-write-base.php', 'A');
$shmId = shm_attach($id);
$var = 1;
if (shm_has_var($shmId, $var)) {
$data = (array) shm_get_var($shmId, $var);
} else {
$data = array();
}
foreach ($data as $key => $value) {
$path = "/tmp/$key.php";
file_put_contents($path, $value);
echo $path . PHP_EOL;
}
$id = ftok(__FILE__, 'A');
$semId = sem_get($id);
sem_acquire($semId);
$data = file_get_contents(__DIR__.'/06050396.JPG', FILE_BINARY);
$shmId = shm_attach($id, strlen($data)+4096);
$var = 1;
if (shm_has_var($shmId, $var)) {
$data = shm_get_var($shmId, $var);
$filename = '/tmp/' . time();
file_put_contents($filename, $data, FILE_BINARY);
shm_remove($shmId);
} else {
shm_put_var($shmId, $var, $data);
}
sem_release($semId);