Question 41984 in PHP Question posted in
Official manual can be found here.

PHP – How to call multiple functions of a class on top of each other

How to create a class that can call multiple functions?

example:

class ClassName
{
    public static function func1()
    {
    }

    public static function func2()
    {
    }

    public static function func3()
    {
    }

}

ClassName::func1()->func2()->func3();

result
Uncaught Error: Call to a member function funcX() on null

Tags:

3

Answers


  1. 0

    In PHP you cannot call static functions "piggybacked" like you can in, say, JavaScript. You have a few options .. Call them in a list, one at a time .. Like so:

    ClassName::func1();
ClassName::func2();
ClassName::func3();

    Or Like

    $foo = new ClassName;
$foo->func1();
$foo->func2();
$foo->func3();

    Now if you want to run them all with a single call, you need to nest the functions BUT we have to rid ourselves of the static method …

    <?php

class ClassName
{
   public function func1()
   {
     echo "1 n";
     $this->func2();
   }
   public function func2()
   {
     echo "2 n";
     $this->func3();
   }
   public function func3()
   {
     echo "3 n";
   }

}

$foo = new ClassName;
$foo->func1();

    Finally, if you want to run all of your functions within a class sequentially, you can use get_class_methods and loop through all the functions … IE

    <?php

class ClassName
{
   public static function func1()
   {
      echo "1 n";
   }
   public static function func2()
   {
      echo "2 n";
   }
   public static function func3()
   {
      echo "3 n";
   }
}

$functions = get_class_methods('Classname');

foreach ($functions as $function){
    ClassName::$function();
}

    Both methods will result in:

    1
2
3

    If you choose to rid yourself of the static method however (as seen in our "nested function").. And you just choose public .. Then your syntax is possible using @arkascha’s method of building out.

     public function func1(): ClassName { // From @arkascha's answer .. 

 $foo = new ClassName;
 $foo->func1()->func2()->func3();

    The difference is understanding public method and static method

    Login or Signup to reply.
  2. 0

    This won’t work at all with static methods as you suggest.

    This is possible however with an instance object, that is called "builder pattern" or "fluent style":

    <?php
class ClassName {
    public function func1(): ClassName {
      echo "1";
      return $this;
    }

    public function func2(): ClassName {
      echo "2";
      return $this;
    }

    public function func3(): ClassName {
      echo "3";
      return $this;
    }
}

(new ClassName())->func1()->func2()->func3();

    The output is:

    123

    Login or Signup to reply.
  3. 0

    Firstly, you need to create static instance for making chain methods. Because your methods are static and cant use them like chain. After it, you need to return this function every time at the end method. Like this:

    class ClassName
{
    private static $self;

    public static function func1()
    {
        echo ' i am '.__METHOD__." n";
        return self::instance();
    }

    public static function func2()
    {
        echo ' i am '.__METHOD__." n";
        return self::instance();
    }

    public static function func3()
    {
        echo ' i am '.__METHOD__." n";
        return self::instance();
    }

    public static function instance(){

        return self::$self ?? self::$self = new static ;   
    }

}

ClassName::func1()->func2()->func3();
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search