How Can I Dynamically Assign Values to PHP Class Properties?

Dynamic Class Property Value Assignment in PHP

Your code fails because PHP class properties must be assigned values during declaration or in the constructor. They cannot reference other properties during initialization.

To resolve this, you can define the properties in the constructor using the __construct method:

public function __construct() {
    $this->fullname = $this->firstname . ' ' . $this->lastname;
    $this->totalBal = $this->balance + $this->newCredit;
}

Why not during initialization?

As the PHP manual states, class property initialization "must be a constant value that can be evaluated at compile time and must not depend on run-time information." This ensures that properties have fixed values upon class instantiation, even before any methods are called.

For more information, refer to the PHP documentation on OOP properties: http://php.net/manual/en/language.oop5.properties.php

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