diff options
-rw-r--r-- | oo/abstract.php | 27 | ||||
-rw-r--r-- | oo/magic_methods.php | 16 | ||||
-rw-r--r-- | oo/singleton.php | 3 | ||||
-rw-r--r-- | scratch.php | 7 |
4 files changed, 53 insertions, 0 deletions
diff --git a/oo/abstract.php b/oo/abstract.php new file mode 100644 index 0000000..141f7b7 --- /dev/null +++ b/oo/abstract.php @@ -0,0 +1,27 @@ +<?php + +abstract class Polygon { + protected $sides = 0; + abstract protected function area(); + public function getSidesNum() { + return $this->sides; + } +} + +class Triangle extends Polygon { + private $width = 0; + private $height = 0; + function __construct($w, $h) { + /* parent::__construct(); perhaps abstract classes do not have a ctor */ + $this->width = $w; + $this->height = $h; + $this->sides = 3; + } + + public function area() { + return $this->width * $this->height * 1/2; + } +} + +$rightTri = new Triangle(4,4); +echo "area: {$rightTri->area()}, sides: {$rightTri->getSidesNum()}" . PHP_EOL; diff --git a/oo/magic_methods.php b/oo/magic_methods.php new file mode 100644 index 0000000..8d9da79 --- /dev/null +++ b/oo/magic_methods.php @@ -0,0 +1,16 @@ +<?php + +abstract class Base { + protected $arr; + + function __construct() { + echo 'dispatching ctor'; + $this->arr = array(); + } + + abstract protected function foo(); +} + +class Derived extends Base { + +}
\ No newline at end of file diff --git a/oo/singleton.php b/oo/singleton.php new file mode 100644 index 0000000..50cce95 --- /dev/null +++ b/oo/singleton.php @@ -0,0 +1,3 @@ +<?php + + diff --git a/scratch.php b/scratch.php new file mode 100644 index 0000000..9c47450 --- /dev/null +++ b/scratch.php @@ -0,0 +1,7 @@ +<?php + +function foo() { + echo "hello, world!" . PHP_EOL; +} + +call_user_func("foo"); |