PHP OOP - How to call main function and sub function

Question

I have to learn about OOP chaining:

$data = new myclass;
$data->sub_function()->main_function();

But now I want to code it looks like this:

$data = new myclass;
$main = $data->main_function();
$sub = $main->sub_function();

If so how would write the class functions for this?

Please help me!

The other way around... so: $data = new myclass; $sub = $data->sub_function(); $main = $sub->main_function(); Since this is exactly equal to your first post, only you're using a temporary variable instead of directly chaining it — Tularis
– Tularis, Commented Feb 11, 2014 at 9:11
These may help you, 1. stackoverflow.com/questions/2990952/php-oop-method-chaining 2. stackoverflow.com/questions/125268/… — Vijayakumar Selvaraj
– Vijayakumar Selvaraj, Commented Feb 11, 2014 at 9:11
Using a fluent interface: sub_function() must return $this — Mark Baker
– Mark Baker, Commented Feb 11, 2014 at 9:11

TMH · Accepted Answer · 2014-02-11 09:28:13Z

5

class myclass {

    public function main_function() {
        //Do your actions here
        return $this;
    }

    public function sub_function() {
        //Do your actions here
        return $this;
    }
}

edited Feb 11, 2014 at 9:28

answered Feb 11, 2014 at 9:10

TMH

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Comments

UserNaN · Accepted Answer · 2014-02-11 09:24:24Z

0

class myclass {
    public function main_function() {
        return 'MAIN ';
    }
    public function sub_function($str) {
        if ($str == 1) $result = 'SELECT 1';
        else if ($str == 2) $result = 'SELECT 2';
        else $result = 'NOT FOUND';
        return $result;
    }
}
$data = new myclass;
$main = $data->main_function();
$sub = $main->sub_function(1);
echo $sub; // Fatal error: Call to a member function sub_function() on a non-object...

I need return string in each functions (not set value/key)

answered Feb 11, 2014 at 9:24

UserNaN

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4 Comments

TMH Over a year ago

Because $main is just the string MAIN, try $data->sub_function(1);

TMH Over a year ago

Also, this should have been an edit to your original post, not an answer

UserNaN Over a year ago

Thanks, but id need $data->main_function()->sub_function

TMH Over a year ago

The only way you could do that is if main_function() returned $this, otherwise you're trying to run sub_function on a string, not your class. If you show us more of what you're trying to do we might be able to help more.

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