php_upr3

<pre>
<?php
## primer 1
$a = 'b';
$b = 'c';
$c = 'd';
$d = 5;
echo $$$$a."\n";
## $a se zamestva s b -> $b se zamestva s c -> $c -> $d -> 5
## primer 2
echo "PRIMER #2\n";
$a = 'test';
echo "$a \n";
echo foo999()."\n";
echo "$a \n";
function foo999($str='default'){
    $a = "I am foo $str";
    echo "$a \n";
    return $a;
}
## primer 3
echo "PRIMER #3\n";
$a = 12;
$v1 = 12;
$v2 = 21;
if($a>5) {
    function foo2($v1, $v2){
    return $v1+$v2;
    }
} else {
    function foo2(){
    return "hello $str";
    }
    }
    echo foo2($v1, $v2);
## primer 4
echo "PRIMER #4\n";
$a = "aaa";
echo "$a \n";
foo4($a);
echo "$a \n";
function foo4(&$b){
    $b ="123";
}
## ukazateli
## primer 6
echo "PRIMER #6\n";
$a ="foo6";
$a($a);
function foo6($b){
    echo "I am a function $b\n";
    }
## primer 7
echo "PRIMER #7\n";
## primer 8
echo "PRIMER #8\n";
$a = new foo("aaa", 4);
var_dump($a);   // za debug
echo $a->var,"\n";
echo $a->public,"\n";
echo $a->printme();
// $b = $a; // durji obekta
$a = ""; // za da se destructira tuk a ne nakraq na scripta
class foo{
    var $var = "Var";
    public $public = "Public"; // var == public
    private $private = "Private";
    protected $protected = "Protected";
    function __construct(){ // default constructor "__construct" vinagi
        $abc = func_get_args(); // v $abc 6te imame masiv s argumentite podadeni pri izvikvaneto na konstruktora
        var_dump($abc);
        echo "I am a constructor\n";
    }
    function __destruct(){ // default constructor "__construct" vinagi
        echo "I am a destructor\n";
    }
//  function foo() {  // star na4in za deklarirane na constructor
//      echo "I am old constructor\n";
//  }
    function printme() {
        echo $this->public, "\n";
        }
}
$aa = new bar;
$aa->printme();
class bar extends foo{
    function printme() {
        echo $this->public, "\n";
        parent::__construct(); // obry6tenie kym nasledqvaniq klas
        }
}
## primer 9
echo "PRIMER #9\n";
$a = new a;
echo $a->b()[0][2], "\n";
class a{
    function b(){
        return array('abaer',2,3);
    }
}
?>