Implementing static functions in PHP

Question

This may sound stupid to all,but I am facing this issue with the static functions in PHP. Still new to OO programming in PHP so need some help.

I have a DB class which handles all the functions for connection and crud operations in my application.I have another class which extends the DB class and uses the methods in it.

     class Database(){

          function db_connect(){
                //body
            }
      }

    /*****The inheritor class*****/  
    class Inheritor extends Database{
         function abcd(){
                  $this->db_connect();         //This works good
          }

     }

But now I have to use the function abcd(){} in a other class as it carries out the same task.The new class is this for example which also extends the database class:

     class newClass extends Database{

           function otherTask(){
               //Here I need to call the function abcd();
            }
     }

I tried making the function abcd() static but then I cannot use the this in the function definition in class Inheritor. I also tried creating the object of database class and but that's not permissible I believe as it gave error.

Can someone suggest me the right way to achieve what I am trying to?

Will that also allow me to get access to the Database methods?? @ChristopherMorrissey — coderunner
– coderunner, Commented Oct 15, 2013 at 16:14
Sounds to me like newClass should extend Inheritor, or that function abcd should be a member of Database. This is about logically grouping your code and class hierarchy, which is hard to give any advice on without knowing the real purpose of each class. — deceze
– deceze ♦, Commented Oct 15, 2013 at 16:14
if newClass needs access to methods in Inheritor, why wouldn't newClass extend Inheritor? Or you could move shared functions into Database so both child classes have access to them. — Chris Rasco
– Chris Rasco, Commented Oct 15, 2013 at 16:14

Sgn. · Accepted Answer · 2013-10-15 16:26:42Z

3

You can simply extend the Inheritor class. This will give you access to both Database and Inheritor methods.

class NewClass extends Inheritor {
   function otherTask() {
       //...
       $this->abcd();
       //...
   }
}

answered Oct 15, 2013 at 16:26

Sgn.

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user2883341 · Accepted Answer · 2013-10-15 16:32:17Z

2

When you extends a class the new class inherit the previous methods. Example:

Class database{
Method a(){}
Method b(){}
Method c(){}
}
Class inheritor extends database{
//this class inherit the previous methods
    Method d(){}
}
Class newCalss extends inheritor{
    //this class will inherit all previous methods
    //if this class you extends the database class you will not have 
    //the methods d() 

}

answered Oct 15, 2013 at 16:32

user2883341

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