Introduction
Laravel includes a variety of global "helper" PHP functions. Many of these functions are used by the framework itself; however, you are free to use them in your own applications if you find them convenient.
Available Methods
Arrays & Objects
Paths
Strings
URLs
Miscellaneous
Method Listing
Arrays & Objects
array_add()
The array_add
function adds a given key / value pair to
an array if the given key doesn't already exist in the array:
$array = array_add(['name' => 'Desk'], 'price', 100);
// ['name' => 'Desk', 'price' => 100]
array_collapse()
The array_collapse
function collapses an array of arrays
into a single array:
$array = array_collapse([[1, 2, 3], [4, 5, 6], [7, 8, 9]]);
// [1, 2, 3, 4, 5, 6, 7, 8, 9]
array_divide()
The array_divide
function returns two arrays, one
containing the keys, and the other containing the values of the given
array:
list($keys, $values) = array_divide(['name' => 'Desk']);
// $keys: ['name']
// $values: ['Desk']
array_dot()
The array_dot
function flattens a multi-dimensional
array into a single level array that uses "dot" notation to indicate
depth:
$array = ['products' => ['desk' => ['price' => 100]]];
$flattened = array_dot($array);
// ['products.desk.price' => 100]
array_except()
The array_except
function removes the given key / value
pairs from an array:
$array = ['name' => 'Desk', 'price' => 100];
$filtered = array_except($array, ['price']);
// ['name' => 'Desk']
array_first()
The array_first
function returns the first element of an
array passing a given truth test:
$array = [100, 200, 300];
$first = array_first($array, function ($value, $key) {
return $value >= 150;
});
// 200
A default value may also be passed as the third parameter to the method. This value will be returned if no value passes the truth test:
$first = array_first($array, $callback, $default);
array_flatten()
The array_flatten
function flattens a multi-dimensional
array into a single level array:
$array = ['name' => 'Joe', 'languages' => ['PHP', 'Ruby']];
$flattened = array_flatten($array);
// ['Joe', 'PHP', 'Ruby']
array_forget()
The array_forget
function removes a given key / value
pair from a deeply nested array using "dot" notation:
$array = ['products' => ['desk' => ['price' => 100]]];
array_forget($array, 'products.desk');
// ['products' => []]
array_get()
The array_get
function retrieves a value from a deeply
nested array using "dot" notation:
$array = ['products' => ['desk' => ['price' => 100]]];
$price = array_get($array, 'products.desk.price');
// 100
The array_get
function also accepts a default value,
which will be returned if the specific key is not found:
$discount = array_get($array, 'products.desk.discount', 0);
// 0
array_has()
The array_has
function checks whether a given item or
items exists in an array using "dot" notation:
$array = ['product' => ['name' => 'Desk', 'price' => 100]];
$contains = array_has($array, 'product.name');
// true
$contains = array_has($array, ['product.price', 'product.discount']);
// false
array_last()
The array_last
function returns the last element of an
array passing a given truth test:
$array = [100, 200, 300, 110];
$last = array_last($array, function ($value, $key) {
return $value >= 150;
});
// 300
A default value may be passed as the third argument to the method. This value will be returned if no value passes the truth test:
$last = array_last($array, $callback, $default);
array_only()
The array_only
function returns only the specified key /
value pairs from the given array:
$array = ['name' => 'Desk', 'price' => 100, 'orders' => 10];
$slice = array_only($array, ['name', 'price']);
// ['name' => 'Desk', 'price' => 100]
array_pluck()
The array_pluck
function retrieves all of the values for
a given key from an array:
$array = [
['developer' => ['id' => 1, 'name' => 'Taylor']],
['developer' => ['id' => 2, 'name' => 'Abigail']],
];
$names = array_pluck($array, 'developer.name');
// ['Taylor', 'Abigail']
You may also specify how you wish the resulting list to be keyed:
$names = array_pluck($array, 'developer.name', 'developer.id');
// [1 => 'Taylor', 2 => 'Abigail']
array_prepend()
The array_prepend
function will push an item onto the
beginning of an array:
$array = ['one', 'two', 'three', 'four'];
$array = array_prepend($array, 'zero');
// ['zero', 'one', 'two', 'three', 'four']
If needed, you may specify the key that should be used for the value:
$array = ['price' => 100];
$array = array_prepend($array, 'Desk', 'name');
// ['name' => 'Desk', 'price' => 100]
array_pull()
The array_pull
function returns and removes a key /
value pair from an array:
$array = ['name' => 'Desk', 'price' => 100];
$name = array_pull($array, 'name');
// $name: Desk
// $array: ['price' => 100]
A default value may be passed as the third argument to the method. This value will be returned if the key doesn't exist:
$value = array_pull($array, $key, $default);
array_random()
The array_random
function returns a random value from an
array:
$array = [1, 2, 3, 4, 5];
$random = array_random($array);
// 4 - (retrieved randomly)
You may also specify the number of items to return as an optional second argument. Note that providing this argument will return an array, even if only one item is desired:
$items = array_random($array, 2);
// [2, 5] - (retrieved randomly)
array_set()
The array_set
function sets a value within a deeply
nested array using "dot" notation:
$array = ['products' => ['desk' => ['price' => 100]]];
array_set($array, 'products.desk.price', 200);
// ['products' => ['desk' => ['price' => 200]]]
array_sort()
The array_sort
function sorts an array by its
values:
$array = ['Desk', 'Table', 'Chair'];
$sorted = array_sort($array);
// ['Chair', 'Desk', 'Table']
You may also sort the array by the results of the given Closure:
$array = [
['name' => 'Desk'],
['name' => 'Table'],
['name' => 'Chair'],
];
$sorted = array_values(array_sort($array, function ($value) {
return $value['name'];
}));
/*
[
['name' => 'Chair'],
['name' => 'Desk'],
['name' => 'Table'],
]
*/
array_sort_recursive()
The array_sort_recursive
function recursively sorts an
array using the sort
function:
$array = [
['Roman', 'Taylor', 'Li'],
['PHP', 'Ruby', 'JavaScript'],
];
$sorted = array_sort_recursive($array);
/*
[
['Li', 'Roman', 'Taylor'],
['JavaScript', 'PHP', 'Ruby'],
]
*/
array_where()
The array_where
function filters an array using the
given Closure:
$array = [100, '200', 300, '400', 500];
$filtered = array_where($array, function ($value, $key) {
return is_string($value);
});
// [1 => 200, 3 => 400]
array_wrap()
The array_wrap
function wraps the given value in an
array. If the given value is already an array it will not be
changed:
$string = 'Laravel';
$array = array_wrap($string);
// ['Laravel']
If the given value is null, an empty array will be returned:
$nothing = null;
$array = array_wrap($nothing);
// []
data_fill()
The data_fill
function sets a missing value within a
nested array or object using "dot" notation:
$data = ['products' => ['desk' => ['price' => 100]]];
data_fill($data, 'products.desk.price', 200);
// ['products' => ['desk' => ['price' => 100]]]
data_fill($data, 'products.desk.discount', 10);
// ['products' => ['desk' => ['price' => 100, 'discount' => 10]]]
This function also accepts asterisks as wildcards and will fill the target accordingly:
$data = [
'products' => [
['name' => 'Desk 1', 'price' => 100],
['name' => 'Desk 2'],
],
];
data_fill($data, 'products.*.price', 200);
/*
[
'products' => [
['name' => 'Desk 1', 'price' => 100],
['name' => 'Desk 2', 'price' => 200],
],
]
*/
data_get()
The data_get
function retrieves a value from a nested
array or object using "dot" notation:
$data = ['products' => ['desk' => ['price' => 100]]];
$price = data_get($data, 'products.desk.price');
// 100
The data_get
function also accepts a default value,
which will be returned if the specified key is not found:
$discount = data_get($data, 'products.desk.discount', 0);
// 0
data_set()
The data_set
function sets a value within a nested array
or object using "dot" notation:
$data = ['products' => ['desk' => ['price' => 100]]];
data_set($data, 'products.desk.price', 200);
// ['products' => ['desk' => ['price' => 200]]]
This function also accepts wildcards and will set values on the target accordingly:
$data = [
'products' => [
['name' => 'Desk 1', 'price' => 100],
['name' => 'Desk 2', 'price' => 150],
],
];
data_set($data, 'products.*.price', 200);
/*
[
'products' => [
['name' => 'Desk 1', 'price' => 200],
['name' => 'Desk 2', 'price' => 200],
],
]
*/
By default, any existing values are overwritten. If you wish to only
set a value if it doesn't exist, you may pass false
as the
third argument:
$data = ['products' => ['desk' => ['price' => 100]]];
data_set($data, 'products.desk.price', 200, false);
// ['products' => ['desk' => ['price' => 100]]]
head()
The head
function returns the first element in the given
array:
$array = [100, 200, 300];
$first = head($array);
// 100
last()
The last
function returns the last element in the given
array:
$array = [100, 200, 300];
$last = last($array);
// 300
Paths
app_path()
The app_path
function returns the fully qualified path
to the app
directory. You may also use the
app_path
function to generate a fully qualified path to a
file relative to the application directory:
$path = app_path();
$path = app_path('Http/Controllers/Controller.php');
base_path()
The base_path
function returns the fully qualified path
to the project root. You may also use the base_path
function to generate a fully qualified path to a given file relative to
the project root directory:
$path = base_path();
$path = base_path('vendor/bin');
config_path()
The config_path
function returns the fully qualified
path to the config
directory. You may also use the
config_path
function to generate a fully qualified path to
a given file within the application's configuration directory:
$path = config_path();
$path = config_path('app.php');
database_path()
The database_path
function returns the fully qualified
path to the database
directory. You may also use the
database_path
function to generate a fully qualified path
to a given file within the database directory:
$path = database_path();
$path = database_path('factories/UserFactory.php');
mix()
The mix
function returns the path to a versioned Mix file:
$path = mix('css/app.css');
public_path()
The public_path
function returns the fully qualified
path to the public
directory. You may also use the
public_path
function to generate a fully qualified path to
a given file within the public directory:
$path = public_path();
$path = public_path('css/app.css');
resource_path()
The resource_path
function returns the fully qualified
path to the resources
directory. You may also use the
resource_path
function to generate a fully qualified path
to a given file within the resources directory:
$path = resource_path();
$path = resource_path('assets/sass/app.scss');
storage_path()
The storage_path
function returns the fully qualified
path to the storage
directory. You may also use the
storage_path
function to generate a fully qualified path to
a given file within the storage directory:
$path = storage_path();
$path = storage_path('app/file.txt');
Strings
__()
The __
function translates the given translation string
or translation key using your localization
files:
echo __('Welcome to our application');
echo __('messages.welcome');
If the specified translation string or key does not exist, the
__
function will return the given value. So, using the
example above, the __
function would return
messages.welcome
if that translation key does not
exist.
camel_case()
The camel_case
function converts the given string to
camelCase
:
$converted = camel_case('foo_bar');
// fooBar
class_basename()
The class_basename
returns the class name of the given
class with the class' namespace removed:
$class = class_basename('Foo\Bar\Baz');
// Baz
e()
The e
function runs PHP's htmlspecialchars
function with the double_encode
option set to
false
:
echo e('<html>foo</html>');
// <html>foo</html>
ends_with()
The ends_with
function determines if the given string
ends with the given value:
$result = ends_with('This is my name', 'name');
// true
kebab_case()
The kebab_case
function converts the given string to
kebab-case
:
$converted = kebab_case('fooBar');
// foo-bar
preg_replace_array()
The preg_replace_array
function replaces a given pattern
in the string sequentially using an array:
$string = 'The event will take place between :start and :end';
$replaced = preg_replace_array('/:[a-z_]+/', ['8:30', '9:00'], $string);
// The event will take place between 8:30 and 9:00
snake_case()
The snake_case
function converts the given string to
snake_case
:
$converted = snake_case('fooBar');
// foo_bar
starts_with()
The starts_with
function determines if the given string
begins with the given value:
$result = starts_with('This is my name', 'This');
// true
str_after()
The str_after
function returns everything after the
given value in a string:
$slice = str_after('This is my name', 'This is');
// ' my name'
str_before()
The str_before
function returns everything before the
given value in a string:
$slice = str_before('This is my name', 'my name');
// 'This is '
str_contains()
The str_contains
function determines if the given string
contains the given value (case sensitive):
$contains = str_contains('This is my name', 'my');
// true
You may also pass an array of values to determine if the given string contains any of the values:
$contains = str_contains('This is my name', ['my', 'foo']);
// true
str_finish()
The str_finish
function adds a single instance of the
given value to a string if it does not already end with the value:
$adjusted = str_finish('this/string', '/');
// this/string/
$adjusted = str_finish('this/string/', '/');
// this/string/
str_is()
The str_is
function determines if a given string matches
a given pattern. Asterisks may be used to indicate wildcards:
$matches = str_is('foo*', 'foobar');
// true
$matches = str_is('baz*', 'foobar');
// false
str_limit()
The str_limit
function truncates the given string at the
specified length:
$truncated = str_limit('The quick brown fox jumps over the lazy dog', 20);
// The quick brown fox...
You may also pass a third argument to change the string that will be appended to the end:
$truncated = str_limit('The quick brown fox jumps over the lazy dog', 20, ' (...)');
// The quick brown fox (...)
str_plural()
The str_plural
function converts a string to its plural
form. This function currently only supports the English language:
$plural = str_plural('car');
// cars
$plural = str_plural('child');
// children
You may provide an integer as a second argument to the function to retrieve the singular or plural form of the string:
$plural = str_plural('child', 2);
// children
$plural = str_plural('child', 1);
// child
str_random()
The str_random
function generates a random string of the
specified length. This function uses PHP's random_bytes
function:
$random = str_random(40);
str_replace_array()
The str_replace_array
function replaces a given value in
the string sequentially using an array:
$string = 'The event will take place between ? and ?';
$replaced = str_replace_array('?', ['8:30', '9:00'], $string);
// The event will take place between 8:30 and 9:00
str_replace_first()
The str_replace_first
function replaces the first
occurrence of a given value in a string:
$replaced = str_replace_first('the', 'a', 'the quick brown fox jumps over the lazy dog');
// a quick brown fox jumps over the lazy dog
str_replace_last()
The str_replace_last
function replaces the last
occurrence of a given value in a string:
$replaced = str_replace_last('the', 'a', 'the quick brown fox jumps over the lazy dog');
// the quick brown fox jumps over a lazy dog
str_singular()
The str_singular
function converts a string to its
singular form. This function currently only supports the English
language:
$singular = str_singular('cars');
// car
$singular = str_singular('children');
// child
str_slug()
The str_slug
function generates a URL friendly "slug"
from the given string:
$slug = str_slug('Laravel 5 Framework', '-');
// laravel-5-framework
str_start()
The str_start
function adds a single instance of the
given value to a string if it does not already start with the value:
$adjusted = str_start('this/string', '/');
// /this/string
$adjusted = str_start('/this/string/', '/');
// /this/string
studly_case()
The studly_case
function converts the given string to
StudlyCase
:
$converted = studly_case('foo_bar');
// FooBar
title_case()
The title_case
function converts the given string to
Title Case
:
$converted = title_case('a nice title uses the correct case');
// A Nice Title Uses The Correct Case
trans()
The trans
function translates the given translation key
using your localization files:
echo trans('messages.welcome');
If the specified translation key does not exist, the
trans
function will return the given key. So, using the
example above, the trans
function would return
messages.welcome
if the translation key does not exist.
trans_choice()
The trans_choice
function translates the given
translation key with inflection:
echo trans_choice('messages.notifications', $unreadCount);
If the specified translation key does not exist, the
trans_choice
function will return the given key. So, using
the example above, the trans_choice
function would return
messages.notifications
if the translation key does not
exist.
URLs
action()
The action
function generates a URL for the given
controller action. You do not need to pass the full namespace of the
controller. Instead, pass the controller class name relative to the
App\Http\Controllers
namespace:
$url = action('HomeController@index');
If the method accepts route parameters, you may pass them as the second argument to the method:
$url = action('UserController@profile', ['id' => 1]);
asset()
The asset
function generates a URL for an asset using
the current scheme of the request (HTTP or HTTPS):
$url = asset('img/photo.jpg');
secure_asset()
The secure_asset
function generates a URL for an asset
using HTTPS:
$url = secure_asset('img/photo.jpg');
route()
The route
function generates a URL for the given named
route:
$url = route('routeName');
If the route accepts parameters, you may pass them as the second argument to the method:
$url = route('routeName', ['id' => 1]);
By default, the route
function generates an absolute
URL. If you wish to generate a relative URL, you may pass
false
as the third argument:
$url = route('routeName', ['id' => 1], false);
secure_url()
The secure_url
function generates a fully qualified
HTTPS URL to the given path:
$url = secure_url('user/profile');
$url = secure_url('user/profile', [1]);
url()
The url
function generates a fully qualified URL to the
given path:
$url = url('user/profile');
$url = url('user/profile', [1]);
If no path is provided, a
Illuminate\Routing\UrlGenerator
instance is returned:
$current = url()->current();
$full = url()->full();
$previous = url()->previous();
Miscellaneous
abort()
The abort
function throws an HTTP exception which will be
rendered by the exception
handler:
abort(403);
You may also provide the exception's response text and custom response headers:
abort(403, 'Unauthorized.', $headers);
abort_if()
The abort_if
function throws an HTTP exception if a
given boolean expression evaluates to true
:
abort_if(! Auth::user()->isAdmin(), 403);
Like the abort
method, you may also provide the
exception's response text as the third argument and an array of custom
response headers as the fourth argument.
abort_unless()
The abort_unless
function throws an HTTP exception if a
given boolean expression evaluates to false
:
abort_unless(Auth::user()->isAdmin(), 403);
Like the abort
method, you may also provide the
exception's response text as the third argument and an array of custom
response headers as the fourth argument.
app()
The app
function returns the service container instance:
$container = app();
You may pass a class or interface name to resolve it from the container:
$api = app('HelpSpot\API');
auth()
The auth
function returns an authenticator instance. You may use it
instead of the Auth
facade for convenience:
$user = auth()->user();
If needed, you may specify which guard instance you would like to access:
$user = auth('admin')->user();
back()
The back
function generates a redirect HTTP response to the user's
previous location:
return back($status = 302, $headers = [], $fallback = false);
return back();
bcrypt()
The bcrypt
function hashes
the given value using Bcrypt. You may use it as an alternative to the
Hash
facade:
$password = bcrypt('my-secret-password');
broadcast()
The broadcast
function broadcasts the given event to its listeners:
broadcast(new UserRegistered($user));
blank()
The blank
function returns whether the given value is
"blank":
blank('');
blank(' ');
blank(null);
blank(collect());
// true
blank(0);
blank(true);
blank(false);
// false
For the inverse of blank
, see the filled
method.
cache()
The cache
function may be used to get values from the cache. If the given key does not exist in the
cache, an optional default value will be returned:
$value = cache('key');
$value = cache('key', 'default');
You may add items to the cache by passing an array of key / value pairs to the function. You should also pass the number of minutes or duration the cached value should be considered valid:
cache(['key' => 'value'], 5);
cache(['key' => 'value'], now()->addSeconds(10));
class_uses_recursive()
The class_uses_recursive
function returns all traits
used by a class, including traits used by any subclasses:
$traits = class_uses_recursive(App\User::class);
collect()
The collect
function creates a collection instance from the given
value:
$collection = collect(['taylor', 'abigail']);
config()
The config
function gets the value of a configuration variable. The configuration
values may be accessed using "dot" syntax, which includes the name of
the file and the option you wish to access. A default value may be
specified and is returned if the configuration option does not
exist:
$value = config('app.timezone');
$value = config('app.timezone', $default);
You may set configuration variables at runtime by passing an array of key / value pairs:
config(['app.debug' => true]);
cookie()
The cookie
function creates a new cookie instance:
$cookie = cookie('name', 'value', $minutes);
csrf_field()
The csrf_field
function generates an HTML
hidden
input field containing the value of the CSRF token.
For example, using Blade syntax:
{{ csrf_field() }}
csrf_token()
The csrf_token
function retrieves the value of the
current CSRF token:
$token = csrf_token();
dd()
The dd
function dumps the given variables and ends
execution of the script:
dd($value);
dd($value1, $value2, $value3, ...);
If you do not want to halt the execution of your script, use the dump
function instead.
decrypt()
The decrypt
function decrypts the given value using
Laravel's encrypter:
$decrypted = decrypt($encrypted_value);
dispatch()
The dispatch
function pushes the given job onto the Laravel job queue:
dispatch(new App\Jobs\SendEmails);
dispatch_now()
The dispatch_now
function runs the given job immediately and returns the
value from its handle
method:
$result = dispatch_now(new App\Jobs\SendEmails);
dump()
The dump
function dumps the given variables:
dump($value);
dump($value1, $value2, $value3, ...);
If you want to stop executing the script after dumping the variables,
use the dd
function instead.
encrypt()
The encrypt
function encrypts the given value using
Laravel's encrypter:
$encrypted = encrypt($unencrypted_value);
env()
The env
function retrieves the value of an environment
variable or returns a default value:
$env = env('APP_ENV');
// Returns 'production' if APP_ENV is not set...
$env = env('APP_ENV', 'production');
Note: If you execute the
config:cache
command during your deployment process, you should be sure that you are only calling theenv
function from within your configuration files. Once the configuration has been cached, the.env
file will not be loaded and all calls to theenv
function will returnnull
.
event()
The event
function dispatches the given event to its listeners:
event(new UserRegistered($user));
factory()
The factory
function creates a model factory builder for
a given class, name, and amount. It can be used while testing or seeding:
$user = factory(App\User::class)->make();
filled()
The filled
function returns whether the given value is
not "blank":
filled(0);
filled(true);
filled(false);
// true
filled('');
filled(' ');
filled(null);
filled(collect());
// false
For the inverse of filled
, see the blank
method.
info()
The info
function will write information to the log:
info('Some helpful information!');
An array of contextual data may also be passed to the function:
info('User login attempt failed.', ['id' => $user->id]);
logger()
The logger
function can be used to write a
debug
level message to the log:
logger('Debug message');
An array of contextual data may also be passed to the function:
logger('User has logged in.', ['id' => $user->id]);
A logger instance will be returned if no value is passed to the function:
logger()->error('You are not allowed here.');
method_field()
The method_field
function generates an HTML
hidden
input field containing the spoofed value of the
form's HTTP verb. For example, using Blade
syntax:
<form method="POST">
{{ method_field('DELETE') }}
</form>
now()
The now
function creates a new
Illuminate\Support\Carbon
instance for the current
time:
$now = now();
old()
The old
function retrieves an old input value flashed into the
session:
$value = old('value');
$value = old('value', 'default');
optional()
The optional
function accepts any argument and allows
you to access properties or call methods on that object. If the given
object is null
, properties and methods will return
null
instead of causing an error:
return optional($user->address)->street;
{!! old('name', optional($user)->name) !!}
policy()
The policy
method retrieves a policy instance for a
given class:
$policy = policy(App\User::class);
redirect()
The redirect
function returns a redirect HTTP response, or returns
the redirector instance if called with no arguments:
return redirect($to = null, $status = 302, $headers = [], $secure = null);
return redirect('/home');
return redirect()->route('route.name');
report()
The report
function will report an exception using your
exception handler's
report
method:
report($e);
request()
The request
function returns the current request instance or obtains an input item:
$request = request();
$value = request('key', $default);
rescue()
The rescue
function executes the given Closure and
catches any exceptions that occur during its execution. All exceptions
that are caught will be sent to your exception handler's
report
method; however, the request will continue
processing:
return rescue(function () {
return $this->method();
});
You may also pass a second argument to the rescue
function. This argument will be the "default" value that should be
returned if an exception occurs while executing the Closure:
return rescue(function () {
return $this->method();
}, false);
return rescue(function () {
return $this->method();
}, function () {
return $this->failure();
});
resolve()
The resolve
function resolves a given class or interface
name to its instance using the service
container:
$api = resolve('HelpSpot\API');
response()
The response
function creates a response instance or obtains an instance of
the response factory:
return response('Hello World', 200, $headers);
return response()->json(['foo' => 'bar'], 200, $headers);
retry()
The retry
function attempts to execute the given
callback until the given maximum attempt threshold is met. If the
callback does not throw an exception, its return value will be returned.
If the callback throws an exception, it will automatically be retried.
If the maximum attempt count is exceeded, the exception will be
thrown:
return retry(5, function () {
// Attempt 5 times while resting 100ms in between attempts...
}, 100);
session()
The session
function may be used to get or set session values:
$value = session('key');
You may set values by passing an array of key / value pairs to the function:
session(['chairs' => 7, 'instruments' => 3]);
The session store will be returned if no value is passed to the function:
$value = session()->get('key');
session()->put('key', $value);
tap()
The tap
function accepts two arguments: an arbitrary
$value
and a Closure. The $value
will be
passed to the Closure and then be returned by the tap
function. The return value of the Closure is irrelevant:
$user = tap(User::first(), function ($user) {
$user->name = 'taylor';
$user->save();
});
If no Closure is passed to the tap
function, you may
call any method on the given $value
. The return value of
the method you call will always be $value
, regardless of
what the method actually returns in its definition. For example, the
Eloquent update
method typically returns an integer.
However, we can force the method to return the model itself by chaining
the update
method call through the tap
function:
$user = tap($user)->update([
'name' => $name,
'email' => $email,
]);
today()
The today
function creates a new
Illuminate\Support\Carbon
instance for the current
date:
$today = today();
throw_if()
The throw_if
function throws the given exception if a
given boolean expression evaluates to true
:
throw_if(! Auth::user()->isAdmin(), AuthorizationException::class);
throw_if(
! Auth::user()->isAdmin(),
AuthorizationException::class,
'You are not allowed to access this page'
);
throw_unless()
The throw_unless
function throws the given exception if
a given boolean expression evaluates to false
:
throw_unless(Auth::user()->isAdmin(), AuthorizationException::class);
throw_unless(
Auth::user()->isAdmin(),
AuthorizationException::class,
'You are not allowed to access this page'
);
trait_uses_recursive()
The trait_uses_recursive
function returns all traits
used by a trait:
$traits = trait_uses_recursive(\Illuminate\Notifications\Notifiable::class);
transform()
The transform
function executes a Closure
on a given value if the value is not blank
and returns the result of the Closure
:
$callback = function ($value) {
return $value * 2;
};
$result = transform(5, $callback);
// 10
A default value or Closure
may also be passed as the
third parameter to the method. This value will be returned if the given
value is blank:
$result = transform(null, $callback, 'The value is blank');
// The value is blank
validator()
The validator
function creates a new validator instance with the given arguments.
You may use it instead of the Validator
facade for
convenience:
$validator = validator($data, $rules, $messages);
value()
The value
function returns the value it is given.
However, if you pass a Closure
to the function, the
Closure
will be executed then its result will be
returned:
$result = value(true);
// true
$result = value(function () {
return false;
});
// false
view()
The view
function retrieves a view instance:
return view('auth.login');
with()
The with
function returns the value it is given. If a
Closure
is passed as the second argument to the function,
the Closure
will be executed and its result will be
returned:
$callback = function ($value) {
return (is_numeric($value)) ? $value * 2 : 0;
};
$result = with(5, $callback);
// 10
$result = with(null, $callback);
// 0
$result = with(5, null);
// 5