EloquentCriteria::sum() - Code Metrics - Inspection of "Merge branch 'develop'" - anomalylabs/streams-platform - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 3ee305...36a69b )

by Ryan

created 2016-08-15 18:30 UTC

EloquentCriteria::sum() A

↳ Parent: EloquentCriteria

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
dl	0
loc	4
rs	10
c	1
b	0
f	1
cc	1
eloc	2
nc	1
nop	1

<?php namespace Anomaly\Streams\Platform\Model;

use Anomaly\Streams\Platform\Entry\Contract\EntryInterface;
use Anomaly\Streams\Platform\Entry\EntryPresenter;
use Anomaly\Streams\Platform\Support\Collection;
use Anomaly\Streams\Platform\Support\Decorator;
use Anomaly\Streams\Platform\Support\Presenter;
use Anomaly\Streams\Platform\Traits\Hookable;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Foundation\Bus\DispatchesJobs;

/**
 * Class EloquentCriteria
 *
 * @link          http://anomaly.is/streams-platform
 * @author        AnomalyLabs, Inc. <[email protected]>
 * @author        Ryan Thompson <[email protected]>
 * @package       Anomaly\Streams\Platform\Model
 */
class EloquentCriteria
{

    use Hookable;
    use DispatchesJobs;

    /**
     * Safe builder methods.
     *
     * @var array
     */
    private $disabled = [
        'delete',
        'update',
    ];

    /**
     * The query builder.
     *
     * @var Builder|\Illuminate\Database\Query\Builder
     */
    protected $query;

    /**
     * Set the get method.
     *
     * @var string
     */
    protected $method;

    /**
     * Create a new EntryCriteria instance.
     *
     * @param Builder $query
     * @param string  $method
     */
    public function __construct(Builder $query, $method = 'get')
    {
        $this->query  = $query;
        $this->method = $method;
    }

    /**
     * Get the paginated entries.
     *
     * @param array $columns
     * @return Collection|Presenter|EntryPresenter
     */
    public function paginate($perPage = 15, array $columns = ['*'])
    {
        return (new Decorator())->decorate($this->query->paginate($perPage, $columns));
    }

    /**
     * Get the entries.
     *
     * @param array $columns
     * @return Collection|Presenter|EntryPresenter
     */
    public function get(array $columns = ['*'])
    {
        return (new Decorator())->decorate($this->query->{$this->method}($columns));
    }

    /**
     * Get the aggregate sum.
     *
     * @param array $columns
     * @return int
     */
    public function sum(array $columns = ['*'])
    {
        return (new Decorator())->decorate($this->query->sum($columns));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
    }

    /**
     * Get the entry count.
     *
     * @param array $columns
     * @return int
     */
    public function count(array $columns = ['*'])
    {
        return (new Decorator())->decorate($this->query->count($columns));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
    }

    /**
     * Find an entry.
     *
     * @param       $identifier
     * @param array $columns
     * @return Presenter|EntryPresenter
     */
    public function find($identifier, array $columns = ['*'])
    {
        return (new Decorator())->decorate($this->query->find($identifier, $columns));
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * Find an entry by column value.
     *
     * @param       $column
     * @param       $value
     * @param array $columns
     * @return Presenter|EntryPresenter
     */
    public function findBy($column, $value, array $columns = ['*'])
    {
        $this->query->where($column, $value);

        return (new Decorator())->decorate($this->query->first($columns));
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * Return the first entry.
     *
     * @param array $columns
     * @return EloquentModel|EntryInterface
     */
    public function first(array $columns = ['*'])
    {
        return (new Decorator())->decorate($this->query->first($columns));
    }

    /**
     * Return whether the method is safe or not.
     *
     * @param $name
     * @return bool
     */
    protected function methodIsSafe($name)
    {
        return (!in_array($name, $this->disabled));
    }

    /**
     * Route through __call.
     *
     * @param $name
     * @return Builder|null
     */
    function __get($name)

    {
        return $this->__call($name, []);
    }

    /**
     * Call the method on the query.
     *
     * @param $name
     * @param $arguments
     * @return Builder|null
     */
    function __call($name, $arguments)

    {

        if ($this->hasHook($name)) {
            return $this->call($name, $arguments);
        }

        if ($this->methodIsSafe($name)) {
            call_user_func_array([$this->query, $name], $arguments);

            return $this;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
        }

        if (starts_with($name, 'findBy') && $column = snake_case(substr($name, 6))) {


            call_user_func_array([$this->query, 'where'], array_merge([$column], $arguments));

            return $this->first();
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
        }

        if (starts_with($name, 'where') && $column = snake_case(substr($name, 5))) {

            call_user_func_array([$this->query, 'where'], array_merge([$column], $arguments));

            return $this;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
        }

        return $this;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * Return the string.
     *
     * @return string
     */
    public function __toString()
    {
        return '';
    }
}

Push — master ( 3ee305...36a69b )

EloquentCriteria::sum() A

Complexity

Size

Duplication

Importance

Available Fixes

Available Fixes

1		<?php namespace Anomaly\Streams\Platform\Model;
2
3		use Anomaly\Streams\Platform\Entry\Contract\EntryInterface;
4		use Anomaly\Streams\Platform\Entry\EntryPresenter;
5		use Anomaly\Streams\Platform\Support\Collection;
6		use Anomaly\Streams\Platform\Support\Decorator;
7		use Anomaly\Streams\Platform\Support\Presenter;
8		use Anomaly\Streams\Platform\Traits\Hookable;
9		use Illuminate\Database\Eloquent\Builder;
10		use Illuminate\Foundation\Bus\DispatchesJobs;
11
12		/**
13		* Class EloquentCriteria
14		*
15		* @link http://anomaly.is/streams-platform
16		* @author AnomalyLabs, Inc. <[email protected]>
17		* @author Ryan Thompson <[email protected]>
18		* @package Anomaly\Streams\Platform\Model
19		*/
20		class EloquentCriteria
21		{
22
23		use Hookable;
24		use DispatchesJobs;
25
26		/**
27		* Safe builder methods.
28		*
29		* @var array
30		*/
31		private $disabled = [
32		'delete',
33		'update',
34		];
35
36		/**
37		* The query builder.
38		*
39		* @var Builder\|\Illuminate\Database\Query\Builder
40		*/
41		protected $query;
42
43		/**
44		* Set the get method.
45		*
46		* @var string
47		*/
48		protected $method;
49
50		/**
51		* Create a new EntryCriteria instance.
52		*
53		* @param Builder $query
54		* @param string $method
55		*/
56		public function __construct(Builder $query, $method = 'get')
57		{
58		$this->query = $query;
59		$this->method = $method;
60		}
61
62		/**
63		* Get the paginated entries.
64		*
65		* @param array $columns
66		* @return Collection\|Presenter\|EntryPresenter
67		*/
68		public function paginate($perPage = 15, array $columns = ['*'])
69		{
70		return (new Decorator())->decorate($this->query->paginate($perPage, $columns));
71		}
72
73		/**
74		* Get the entries.
75		*
76		* @param array $columns
77		* @return Collection\|Presenter\|EntryPresenter
78		*/
79		public function get(array $columns = ['*'])
80		{
81		return (new Decorator())->decorate($this->query->{$this->method}($columns));
82		}
83
84		/**
85		* Get the aggregate sum.
86		*
87		* @param array $columns
88		* @return int
89		*/
90		public function sum(array $columns = ['*'])
91		{
92		return (new Decorator())->decorate($this->query->sum($columns));
		0 ignored issues – show Documentation introduced 2016-08-15 18:36 UTC by Report Bug Copy Issue Report `$columns` is of type `array`, but the function expects a `string`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history... Bug introduced 2016-08-15 18:36 UTC by Report Bug Copy Issue Report The method `sum` does only exist in `Illuminate\Database\Query\Builder`, but not in `Illuminate\Database\Eloquent\Builder`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
93		}
94
95		/**
96		* Get the entry count.
97		*
98		* @param array $columns
99		* @return int
100		*/
101		public function count(array $columns = ['*'])
102		{
103		return (new Decorator())->decorate($this->query->count($columns));
		0 ignored issues – show Documentation introduced 2016-08-15 18:36 UTC by Report Bug Copy Issue Report `$columns` is of type `array`, but the function expects a `string`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history... Bug introduced 2016-08-15 18:36 UTC by Report Bug Copy Issue Report The method `count` does only exist in `Illuminate\Database\Query\Builder`, but not in `Illuminate\Database\Eloquent\Builder`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
104		}
105
106		/**
107		* Find an entry.
108		*
109		* @param $identifier
110		* @param array $columns
111		* @return Presenter\|EntryPresenter
112		*/
113		public function find($identifier, array $columns = ['*'])
114		{
115		return (new Decorator())->decorate($this->query->find($identifier, $columns));
		0 ignored issues – show Bug Best Practice introduced 2016-04-22 19:08 UTC by Report Bug Copy Issue Report The return type of `return (new \Anomaly\Str...identifier, $columns));` (`object\|integer\|double\|string\|null\|boolean\|array`) is incompatible with the return type documented by `Anomaly\Streams\Platform...\EloquentCriteria::find` of type `Anomaly\Streams\Platform\Support\Presenter\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
116		}
117
118		/**
119		* Find an entry by column value.
120		*
121		* @param $column
122		* @param $value
123		* @param array $columns
124		* @return Presenter\|EntryPresenter
125		*/
126		public function findBy($column, $value, array $columns = ['*'])
127		{
128		$this->query->where($column, $value);
129
130		return (new Decorator())->decorate($this->query->first($columns));
		0 ignored issues – show Bug Best Practice introduced 2016-04-22 19:08 UTC by Report Bug Copy Issue Report The return type of `return (new \Anomaly\Str...uery->first($columns));` (`object\|integer\|double\|string\|null\|boolean\|array`) is incompatible with the return type documented by `Anomaly\Streams\Platform...loquentCriteria::findBy` of type `Anomaly\Streams\Platform\Support\Presenter\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
131		}
132
133		/**
134		* Return the first entry.
135		*
136		* @param array $columns
137		* @return EloquentModel\|EntryInterface
138		*/
139		public function first(array $columns = ['*'])
140		{
141		return (new Decorator())->decorate($this->query->first($columns));
142		}
143
144		/**
145		* Return whether the method is safe or not.
146		*
147		* @param $name
148		* @return bool
149		*/
150		protected function methodIsSafe($name)
151		{
152		return (!in_array($name, $this->disabled));
153		}
154
155		/**
156		* Route through __call.
157		*
158		* @param $name
159		* @return Builder\|null
160		*/
161		function __get($name)
		0 ignored issues – show Best Practice introduced 2016-04-22 19:08 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
162		{
163		return $this->__call($name, []);
164		}
165
166		/**
167		* Call the method on the query.
168		*
169		* @param $name
170		* @param $arguments
171		* @return Builder\|null
172		*/
173		function __call($name, $arguments)
		0 ignored issues – show Best Practice introduced 2016-04-22 19:08 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
174		{
175
176		if ($this->hasHook($name)) {
177		return $this->call($name, $arguments);
178		}
179
180		if ($this->methodIsSafe($name)) {
181		call_user_func_array([$this->query, $name], $arguments);
182
183		return $this;
		0 ignored issues – show Bug Best Practice introduced 2016-04-30 01:01 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`Anomaly\Streams\Platform\Model\EloquentCriteria`) is incompatible with the return type documented by `Anomaly\Streams\Platform...loquentCriteria::__call` of type `Illuminate\Database\Eloquent\Builder\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
184		}
185
186	View Code Duplication	if (starts_with($name, 'findBy') && $column = snake_case(substr($name, 6))) {
		0 ignored issues – show Duplication introduced 2016-04-22 19:08 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
187
188		call_user_func_array([$this->query, 'where'], array_merge([$column], $arguments));
189
190		return $this->first();
		0 ignored issues – show Bug Best Practice introduced 2016-04-30 01:01 UTC by Report Bug Copy Issue Report The return type of `return $this->first();` (`object\|integer\|double\|string\|null\|boolean\|array`) is incompatible with the return type documented by `Anomaly\Streams\Platform...loquentCriteria::__call` of type `Illuminate\Database\Eloquent\Builder\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
191		}
192
193	View Code Duplication	if (starts_with($name, 'where') && $column = snake_case(substr($name, 5))) {
		0 ignored issues – show Duplication introduced 2016-04-22 19:08 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
194		call_user_func_array([$this->query, 'where'], array_merge([$column], $arguments));
195
196		return $this;
		0 ignored issues – show Bug Best Practice introduced 2016-08-04 19:19 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`Anomaly\Streams\Platform\Model\EloquentCriteria`) is incompatible with the return type documented by `Anomaly\Streams\Platform...loquentCriteria::__call` of type `Illuminate\Database\Eloquent\Builder\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
197		}
198
199		return $this;
		0 ignored issues – show Bug Best Practice introduced 2016-08-04 19:19 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`Anomaly\Streams\Platform\Model\EloquentCriteria`) is incompatible with the return type documented by `Anomaly\Streams\Platform...loquentCriteria::__call` of type `Illuminate\Database\Eloquent\Builder\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
200		}
201
202		/**
203		* Return the string.
204		*
205		* @return string
206		*/
207		public function __toString()
208		{
209		return '';
210		}
211		}

anomalylabs / streams-platform

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EloquentCriteria::sum() A

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