CODEWITHSUNDEEP
phpclassoopvariables
Milkmannetje
Milkmannetje

Reputation: 1181

How to access a class variable from same class

In this snippet:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product_variant extends Model
{

    protected $primaryKey='variant_id';

    public $translationForeignKey = $this->primaryKey;
}

This rule is not working:

public $translationForeignKey = $this->primaryKey;

How can we access this variable that is in the same scope of this class?

Upvotes: 0

Views: 799

Answers (2)

RiggsFolly
RiggsFolly

Reputation: 94682

Either set the value in a constructor or create a getter to return the value.

// option 1

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product_variant extends Model
{

    protected $primaryKey='variant_id';

    public $translationForeignKey = '';

    // option 1
    public function __construct()
    {
        $this->translationForeignKey = $this->primaryKey;
    }

}

// option 2, you dont even need the other property in this method, unless its value may change during execution

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product_variant extends Model
{

    protected $primaryKey='variant_id';

    // option 2
    public function getTranslationForeignKey()
    {
         return $this->primaryKey;
    }

}

Upvotes: 2

Ashwini Agarwal
Ashwini Agarwal

Reputation: 4858

At the time of defining the class you can only assign constant values to the class properties. Variables are not allowed here.

You need to do assignment part in the constructor.

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product_variant extends Model
{

    protected $primaryKey='variant_id';

    public $translationForeignKey;

    public function __construct() 
    {
        $this->translationForeignKey = $this->primaryKey;
    }
}

Upvotes: 1

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