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1 | <?php |
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2 | class FVSPlugin extends SecurePlugin |
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3 | { |
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4 | function get_secure_menu_entries($page, $user) |
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0 ignored issues
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5 | { |
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6 | $ret = array( |
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7 | 'Volunteer' => $page->secure_root.'fvs/index.php' |
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8 | ); |
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9 | if($user !== null && $user->isInGroupNamed('VolunteerAdmins')) |
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10 | { |
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11 | $ret['Volunteer System Admin'] = $page->secure_root.'fvs/_admin/index.php'; |
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12 | } |
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13 | return $ret; |
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The return type of
return $ret; (array<string,string> ) is incompatible with the return type of the parent method SecurePlugin::get_secure_menu_entries of type boolean .
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 ![]() |
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14 | } |
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15 | |||
16 | function get_plugin_entry_point() |
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0 ignored issues
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17 | { |
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18 | return array( |
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0 ignored issues
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The return type of
return array('name' => '...k' => 'fvs/index.php'); (array<string,string> ) is incompatible with the return type of the parent method SecurePlugin::get_plugin_entry_point of type boolean .
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 ![]() |
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19 | 'name'=>'Volunteer', |
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20 | 'link' => 'fvs/index.php' |
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21 | ); |
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22 | } |
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23 | } |
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24 | /* vim: set tabstop=4 shiftwidth=4 expandtab: */ |
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25 |
Adding explicit visibility (
private
,protected
, orpublic
) is generally recommend to communicate to other developers how, and from where this method is intended to be used.