Example
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | <?php//Public Visibility in PHP Classes//Public methods or variables can be accessible from anywhere. It can be accessible from using object(outside the class), or inside the class, or in child class.class test{public $abc;public $xyz;public function xyz(){}}$objA = new test();echo $objA->abc;//accessible from outside$objA->xyz();//public method of the class test?><?php//Private Visibility in PHP Classes//only be accessible withing the class. Private visibility in php classes is used when you do not want your property or function to be exposed outside the class.Class test{public $abc;private $xyz;public function pubDo($a){echo $a;}private function privDo($b){echo $b;}public function pubPrivDo(){$this->xyz = 1;$this->privDo(1);}}$objT = new test();$objT->abc = 3;//Works fine$objT->xyz = 1;//Throw fatal error of visibility$objT->pubDo("test");//Print "test"$objT->privDo(1);//Fatal error of visibility$objT->pubPrivDo();//Within this method private function privDo and variable xyz is called using $this variable.?><?php//Protected Visibility in PHP Classes//useful in case of inheritance and interface. Protected method or variable can be accessible either within class or child class.class parent{protected $pr;public $aprotected function testParent(){echo this is test;}}class child extends parent{public function testChild(){$this->testParent(); //will work because it}}$objParent = new parent();$objParent->testParent();//Throw error$objChild = new Child();$objChild->setChild();//work because test child will call test parent.?> |
