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Completed
Push — master ( d55531...cfe428 )
by Amine
02:42
created

Placeholder   A

↳ Parent: Project

Complexity

Total Complexity 4

Size/Duplication

Total Lines 13
Duplicated Lines 0 %

Coupling/Cohesion

Components 1
Dependencies 0

Importance

Changes 1
Bugs 0 Features 0
Metric Value
dl 0
loc 13
rs 10
c 1
b 0
f 0
wmc 4
lcom 1
cbo 0

3 Methods

Rating   Name   Duplication   Size   Complexity  
A __construct() 0 1 1
A get() 0 6 2
A __toString() 0 3 1
1 
<?php
2 
namespace Tarsana\Functional;
3 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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/**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * This class is created simply to define a special type

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * for the placeholder. As defining a constant, even

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * a random one, could collide with other values.

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
                    8
                

                                    
                                                    
                
                
                
 */

            


            
                                                                        
                            
            
                                    
            
            

                
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class Placeholder {

            


            
                                                                        
                            
            
                                    
            
            

                
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    private static $instance;

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    private function __construct(){}

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public static function get()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        if(static::$instance === null)

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

                            –
                            show
                        


                        

                                                                                        




    

        
            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
Since $instance is declared private, accessing it with static will lead to errors in possible sub-classes; consider using self, or increasing the visibility of $instance to at least protected.
                                                                                                                                                    

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
Let’s assume you have a class which uses late-static binding:


class YourClass
{
    private static $someVariable;

    public static function getSomeVariable()
    {
        return static::$someVariable;
    }
}





The code above will run fine in your PHP runtime. However, if you now create a
sub-class and call the getSomeVariable() on that sub-class, you will receive
a runtime error:


class YourSubClass extends YourClass { }

YourSubClass::getSomeVariable(); // Will cause an access error.





In the case above, it makes sense to update SomeClass to use self instead:


class SomeClass
{
    private static $someVariable;

    public static function getSomeVariable()
    {
        return self::$someVariable; // self works fine with private.
    }
}





                        

                                                    

                     Loading history...
                

                    


    




                                                                                    


                    		
                

            
                                                                                                            
                            
            
                                    
            
            

                
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            static::$instance = new Placeholder;

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

                            –
                            show
                        


                        

                                                                                        




    

        
            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
Since $instance is declared private, accessing it with static will lead to errors in possible sub-classes; consider using self, or increasing the visibility of $instance to at least protected.
                                                                                                                                                    

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
Let’s assume you have a class which uses late-static binding:


class YourClass
{
    private static $someVariable;

    public static function getSomeVariable()
    {
        return static::$someVariable;
    }
}





The code above will run fine in your PHP runtime. However, if you now create a
sub-class and call the getSomeVariable() on that sub-class, you will receive
a runtime error:


class YourSubClass extends YourClass { }

YourSubClass::getSomeVariable(); // Will cause an access error.





In the case above, it makes sense to update SomeClass to use self instead:


class SomeClass
{
    private static $someVariable;

    public static function getSomeVariable()
    {
        return self::$someVariable; // self works fine with private.
    }
}





                        

                                                    

                     Loading history...
                

                    


    




                                                                                    


                    		
                

            
                                                                                                            
                            
            
                                    
            
            

                
                    16
                

                                    
                                                    
                
                
                
        return static::$instance;

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

                            –
                            show
                        


                        

                                                                                        




    

        
            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
Since $instance is declared private, accessing it with static will lead to errors in possible sub-classes; consider using self, or increasing the visibility of $instance to at least protected.
                                                                                                                                                    

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
Let’s assume you have a class which uses late-static binding:


class YourClass
{
    private static $someVariable;

    public static function getSomeVariable()
    {
        return static::$someVariable;
    }
}





The code above will run fine in your PHP runtime. However, if you now create a
sub-class and call the getSomeVariable() on that sub-class, you will receive
a runtime error:


class YourSubClass extends YourClass { }

YourSubClass::getSomeVariable(); // Will cause an access error.





In the case above, it makes sense to update SomeClass to use self instead:


class SomeClass
{
    private static $someVariable;

    public static function getSomeVariable()
    {
        return self::$someVariable; // self works fine with private.
    }
}





                        

                                                    

                     Loading history...
                

                    


    




                                                                                    


                    		
                

            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function __toString(){

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return '__';

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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