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POdeclare value of property as equal to that of parent
 

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    <p>I have a parent class called 'person'. 'individual' is a child class of 'person'.</p> <p>In 'person', I have a protected property called '$_pk_person';</p> <p>In 'individual', I want to create a protected property called '$_fk_individual_person' whose value is equal to the inherited value of '$_pk_person'.</p> <p>Shouldn't I be able to do this by merely stating:</p> <pre><code>protected $_fk_individual_person = {$this-&gt;_pk_person}; </code></pre> <p>or</p> <pre><code>protected $_fk_individual_person = $_pk_person; </code></pre> <p>or</p> <pre><code>protected $_fk_individual_person = get_pk_person(); </code></pre> <p>or</p> <pre><code>protected $_fk_individual_person = self::get_pk_person(); </code></pre> <p>or</p> <pre><code>protected $_fk_individual_person = self::_pk_person; </code></pre> <p>or</p> <pre><code>protected $_fk_individual_person = parent::_pk_person; </code></pre> <p>or</p> <pre><code>protected $_fk_individual_person = parent::get_pk_person(); </code></pre> <p>in class 'individual'??</p> <p>None of them are working. I must be committing a fundamental error somewhere, as I am a complete novice.</p> <p>Please help me out.</p> <p>AFTER USING CONSTRUCTOR, my class looked like this:</p> <pre><code>class individual extends person { public $_fk_individual_person; function __construct() { $this-&gt;_fk_individual_person = $this-&gt;_pk_person; } } </code></pre> <p>And I tested it, but screen was blank: $xyz = new individual();</p> <pre><code>$xyz-&gt;pk_person='abcd'; echo $xyz-&gt;_fk_individual_person; </code></pre> <p>Where did I goof up now? I'm sorry, but I'm an absolute novice (started oop coding just yesterday, this being my first class)</p>
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