Mbinu za Kiotomatiki ndani ya Darasa katika OOP katika PHP

Ikiwa unataka kutumia mbinu za kiotomatiki ndani ya darasa, basi unapaswa kuziwakilisha sio kupitia $this->, lakini kwa msaada wa self::.

Kwa mfano, wacha tuongeze kwenye darasa letu Math mbinu getDoubleSum, ambayo itakuwa inapata jumla maradufu ya nambari. Tutumie ndani ya mbinu mpya mbinu iliyopo tayari getSum:

<?php
	class Math
	{
		// Wacha tupate jumla maradufu:
		public static function getDoubleSum($a, $b)
		{
			return 2 * self::getSum($a, $b); // tunatumia mbinu nyingine
		}
		
		public static function getSum($a, $b)
		{
			return $a + $b;
		}
		
		public static function getProduct($a, $b)
		{
			return $a * $b;
		}
	}
?>

Wacha tutumie mbinu mpya:

<?php
	echo Math::getDoubleSum(1, 2);
?>

Badilisha mbinu za darasa linalofuata kuwa za kiotomatiki:

<?php
	class ArraySumHelper
	{
		public function getSum1($arr)
		{
			return $this->getSum($arr, 1);
		}
		
		public function getSum2($arr)
		{
			return $this->getSum($arr, 2);
		}
		
		public function getSum3($arr)
		{
			return $this->getSum($arr, 3);
		}
		
		public function getSum4($arr)
		{
			return $this->getSum($arr, 4);
		}
		
		private function getSum($arr, $power) {
			$sum = 0;
			
			foreach ($arr as $elem) {
				$sum += pow($elem, $power);
			}
			
			return $sum;
		}
	}
?>