As for Symfony4 translation, thanks to this article. It works well in Controller.
public function index(TranslatorInterface $translator)
{
$translated = $translator->trans('test');// it works
print $translated;exit;
in messages.en.yaml
test: englishtest
However I can't translate message in twig.
<br>
{{ test|trans }}
<br>
It shows the error Variable "test" does not exist.
I need to do something in advance for translation in twig???
The method signature looks like this:
{{ message|trans(arguments = [], domain = null, locale = null) }}
See https://symfony.com/doc/current/reference/twig_reference.html#trans
So if test is not a variable, then {{ 'test'|trans }} should work (as zalex already pointed out).
I am trying to use the url Twig function with Silex to generate a route, but when I use the variable name that I have passed to the template it generates a warning that I have not supplied the parameter.
This is the array I am passing to the template:
[
"total_pages" => $pages,
"current_page" => $page,
"route_name" => "gallery_album",
"route_parameter" => "groupname",
"route_value" => $groupname
]
And in the template I am trying to use:
{{ url(route_name, {route_parameter: route_value, 'page': page} ) }}
(The page variable value is worked out in the template)
This is part of a pagination template that I am building so I need the parameter to be a variable so it can be applied to different pages. This is the error I get when I run this:
I feel this is something that is very simple, I am just missing something fundamental.
It thinks that route_parameter is a string key name and not a variable:
You can do for example:
{% set params = {'page': page, (route_parameter): route_value } %}
{{ url(route_name, params) }}
You can use {{ app->path}} or {{ app->url }}
if you using Silex\Application\UrlGeneratorTrait in you Application class
or alternative using this
{{ app.url_generator.generate('homepage') }}
I have a url : http://localhost:8888/projects/oop/2
I want to access the first segment --> projects
I've tried
<?php echo $segment1 = Request::segment(1); ?>
I see nothing print out in my view when I refresh my page.
Any helps / suggestions will be much appreciated
Try this
{{ Request::segment(1) }}
BASED ON LARAVEL 5.7 & ABOVE
To get all segments of current URL:
$current_uri = request()->segments();
To get segment posts from http://example.com/users/posts/latest/
NOTE: Segments are an array that starts at index 0. The first element of array starts after the TLD part of the url. So in the above url, segment(0) will be users and segment(1) will be posts.
//get segment 0
$segment_users = request()->segment(0); //returns 'users'
//get segment 1
$segment_posts = request()->segment(1); //returns 'posts'
You may have noted that the segment method only works with the current URL ( url()->current() ). So I designed a method to work with previous URL too by cloning the segment() method:
public function index()
{
$prev_uri_segments = $this->prev_segments(url()->previous());
}
/**
* Get all of the segments for the previous uri.
*
* #return array
*/
public function prev_segments($uri)
{
$segments = explode('/', str_replace(''.url('').'', '', $uri));
return array_values(array_filter($segments, function ($value) {
return $value !== '';
}));
}
The double curly brackets are processed via Blade -- not just plain PHP. This syntax basically echos the calculated value.
{{ Request::segment(1) }}
Here is how one can do it via the global request helper function.
{{ request()->segment(1) }}
Note: request() returns the object of the Request class.
An easy way to get the first or last segment, in case you are unsure of the path length.
$segments = request()->segments();
$last = end($segments);
$first = reset($segments);
Here is code you can get url segment.
{{ Request::segment(1) }}
If you don't want the data to be escaped then use {!! !!} else use {{ }}.
{!! Request::segment(1) !!}
https://laravel.com/docs/4.2/requests
Here is my urlto in laravel
{{ URL::to('forgot'); }}
It will point as mysite.com/forgot
How can i insert the value here
i.e.,
$value = '1';
{{ URL::to('forgot'); }}
And it should point mysite.com/1/forgot
How can i insert the value of $value before the forgot
You should concatenate your $value before your url
i.e.,
$value = '1';
{{ URL::to($value.'/forgot/'); }}
You can use named routes with parameters.
Example route:
Route::get('{value}/forgot', array('as' => 'forgot', function($value = null)
{
return "My value: " . $value;
}));
Now building your URL:
{{ route('forgot', 1); }}
You need to use like this check the documentation Documentation Here
$value = '1';
{{ URL::to($value.'/forgot'); }}
one way is to add a variable to your route
an example here my route is
Route::get('/user/{id}'
then at the destination if i call $id, i get the value that was entered in id.
so if i put /user/1 , $id =1.
this can be a issue however if there is nothing. you need to include code to handle if the $id has no value. another way to do it is
return View::make('searchresults', compact('challenges', 'ideas','users'));
here i have sent arrays with search results, and on the page searchresults if i call $ideas i get that array, this will also work with strings i believe.
I am getting this error when I land on the page after logging in:
ErrorException in compiled.php line 11573: Undefined offset: 0 (View:
C:\xampp\htdocs\campusguru\resources\views\home.blade.php)
I know that the cause of this error is the empty variable that I passed to the view.
I have already tried:
if(isset($blog)) { do something }
and in blade view as:
{{ $blogs[0]->title or '' }}
Is there anyway I could handle this error. Or is there a better way of doing it?
Try the following:
{{ isset($blogs[0]) ? $blogs[0]->title : '' }}
If you are using a foreach to get every $blog->title use
#foreach ($blogs as $blog)
{{ $blog->title }}
#endforeach
The problem is that $blogs is actually defined and its value is [] (i.e. empty array) so it means that isset($blogs) statement will evaluate to true. Same thing is valid for collections. If a collection is empty (i.e. has no elements but it's defined) isset($blogs) will still evaluate to true but accessing $blogs[0] will cause an Undefined offset: 0 error.
You could try the following solutions:
Using count
if(count($blogs)) { /* do something */ }
if $blogs = [] or $blogs = null the function count will return zero so that means that $blogs is empty.
Using empty
if(!empty($blogs)) { /* do something */ }
This is the equivalent of writing !isset($var) || $var == false as described in the PHP Manual - empty:
Returns FALSE if var exists and has a non-empty, non-zero
value. Otherwise returns TRUE.
The following things are considered to be empty: "" (an
empty string) 0 (0 as an integer) 0.0 (0 as a
float) "0" (0 as a string) NULL
FALSE array() (an empty array) $var; (a
variable declared, but without a value)
Checking if a collection is empty
If $blogs is a Collection is sufficient to check if it is not empty using `isNotEmpty() method:
#if($blogs->isNotEmpty()) <!-- Do your stuff --> #endif
EDIT
I forgot to add the blade syntax:
#if(count($blogs)) <!-- Do whatever you like --> #endif
or
#if(!empty($blogs)) <!-- Do whatever you like --> #endif
EDIT 2
I'm adding more content to this answer in order to address some of the issues presented in the comments. I think that your problem is the following:
$blogs is an empty collection, so it's defined but it has no elements. For this reason the if(isset($blogs)) statement will evaluate to true passing the first if condition. In your blade template you are making the check {{ $blogs[0]->title or '' }} that is absolutely not equal to <?php isset($blogs[0]->title) ? $blogs[0]->title : '' ?> as pointed out in the comments, but it is an expression that will return true or false, so it will never print out title parameter even if $blogs[0] exists. The problem here is that when checking the condition $blogs[0]->title you are actually accessing the element 0 of the $blogs collection that will trigger the exception Undefined offset: 0 because the collection is actually empty. What i was saying is that in addition to the
if(count($blogs)) { /* do something */ }
(that checks that $blogs is set and that it's length is greater than 0) in your template you should do
{{ isset($blogs[0]->title) ? $blogs[0]->title : '' }}
or more concisely
{{ $blogs[0]->title ?: '' }}
assuming that the control flow will arrive there only if the $blogs passed the first if. If the issue still persists the problem is elsewhere in your code IMHO.
You can simply solve this with the data_get() helper.
For example:
php artisan tink
Psy Shell v0.8.11 (PHP 7.0.22-0ubuntu0.16.04.1 — cli) by Justin Hileman
>>>
>>> $a = collect([[], null, App\Models\User::find(1)]);
=> Illuminate\Support\Collection {#887
all: [
[],
null,
App\Models\User {#896
id: 1,
name: "user1",
email: "user1#thisisdevelopment.nl",
last_name: "Gabrielle",
first_name: "Rempel",
deleted_at: null,
created_at: "2017-08-12 15:32:01",
updated_at: "2017-09-05 12:23:54",
},
],
}
>>> data_get($a[0], 'name', 'nope');
=> "nope"
>>> data_get($a[1], 'name', 'nope');
=> "nope"
>>> data_get($a[2], 'name', 'nope');
=> "user1"
>>>
So in this case:
{{ data_get($blogs[0], 'title', '') }}
data_get() will work both on arrays and objects, returning the key or attribute defined in the second param (this can be laravel.dot.notation.style, or just an array), the 3rd param will be the default return value if the object/array or the key/attribute does not exist, the default is null.
Edit:
Just saw the request for the extra explanation on why the original code wasn't working.
Index 0 simply does not exist on the array/collection that is passed to the view.
>>> $a = [1 => App\Models\User::find(1)];
=> [
1 => App\Models\User {#890
id: 1,
name: "user1",
// ... etc
},
]
>>> $a[0]->name ?: 'nope';
PHP error: Undefined offset: 0 on line 1
>>> $a[1]->name ?: 'nope';
=> "user1"
It doesn't matter if OP used the blade or default, it doesn't even make it to the ternary statement because of the missing 0 index on $blogs.
Edit 2 as requested:
So the reason you get the Undefined offset: x error is because of the order in which PHP evaluates the code.
Blade's or default is behind the scenes nothing more than a ternary statement:
return preg_replace('/^(?=\$)(.+?)(?:\s+or\s+)(.+?)$/si', 'isset($1) ? $1 : $2', $value);
So this will make:
isset($blogs[0]->title) ? $blogs[0]->title : ''
isset() will check if title on the object is set, but to do so, it will require $blogs[0] to be a valid object. In order to do that, it will try and get the object from the $blogs array at index 0. But since this index does not exist, it will trigger the Exception with an Undefined offset: 0.
In order to make this work with Blade's or default, you would first have to ensure that $blogs[0] is defined (and preferably also check that it's an object, otherwise you'll get the trying to get property of non-object error, please note that this should not be the responsibility of the view), after that you would be able to use the or default as you would any other time.
#if (isset($blogs[0]) && is_object($blogs[0]))
{{ $blogs[0]->title or '' }}
#else
// some other default placeholder
#endif
Basically you will get the same offset error when using data_get(), because index 0 still does not exist.
{{ data_get($blogs[0], 'title', '') }} // Undefined offset: 0
You could play dirty and do this (this would not pass any code review anywhere and I should not have typed this at all, this is just to illustrate)
{{ data_get($blogs, '0.title', '') }} // Will display '' as it will check if key 0 exists
Anyway, with data_get() you would still end up doing something like this, as you would need to make sure $blogs[0] is something you can work with:
#if (isset($blogs[0]))
{{ data_get($blogs[0], 'title', '') }}
#else
// some other default placeholder
#endif
Bottomline, the best option would be not to rely on indexes like this in your view, this is simply not the responsibility of your view.
Blade's or default works perfectly on single variables, but when dealing with object attributes, you would just have to make sure the (parent) object exists when doing so.
I do this way in controller:
if (empty($allFares) || count($allFares)==0){
return back()->withError('No Fare Found For The City!');
}
OR in blade:
#if (!empty($allFares) || count($allFares)>0)
#foreach(allFares as $key=>$value)
#endforeach
#endif
If you have an object that's passed to the view and let's say your data is "posts" which is being held inside an object like this:
$obj->posts.
If you then go and do a foreach loop which would iterate trough every post and print out its parameters like in the example below it works perfectly well when you actually have posts.
#foreach($obj->posts as $post)
<h1>$post->title</h1>
<p>$post->content</p>
#endforeach
Before doing the loop you'd want to check if attribute has been set with values. You can use isset() for this, and since it's a special form it can be used as isset($obj->posts) or isset($obj->posts[0]). The difference is that the latter will only check if the array key has any value so if your index key is anything but 0, it'll return false. For instance you have:
$foo = ['first' => somevalue1, 'second' => somevalue2];
isset($foo[0]); //returns false
isset($foo['first']); //returns true
isset($foo); //returns true
The way I'd make the check is the following:
#if(isset($obj->posts))
#foreach($obj->posts as $post)
...
#endoforeach
#endif
As of PHP7 you can use null coalescing operator ?? for checking ternary conditions:
#if($posts?? '')
#foreach($posts as $post)
<h1>$post->title</h1>
<p>$post->content</p>
#endforeach
#endif
And if you want to print any variable directly then check first that the variable exists or not in condition, so you can do as below:
{{ $blogs && $blogs[0]->title ? $blogs[0]->title : '' }}
For simply solving the issue use the # operator (error control operator)
{{ #$blogs[0]->title }}
The # error control operator (also called STFU operator with mixed feelings), that suppresses errors just for the expression that immediately follows.