How can one define a property in PHP to avoid the "Undefined property" error?

To avoid the "Undefined property" error in PHP, you can define properties within a class using access modifiers such as public, private, or protected. By explicitly declaring properties within a class, you can ensure that they are properly initialized and accessible throughout the class without triggering undefined property errors. 

class MyClass {
    public $property1;
    private $property2;
    
    public function __construct() {
        $this->property1 = 'Initialized property 1';
        $this->property2 = 'Initialized property 2';
    }
    
    public function getProperty1() {
        return $this->property1;
    }
    
    public function getProperty2() {
        return $this->property2;
    }
}

$obj = new MyClass();
echo $obj->getProperty1(); // Output: Initialized property 1
echo $obj->getProperty2(); // Output: Initialized property 2

Keywords

PHP property define error undefined

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