<?php
class C {
    static private $p = 0;
}

try {
    var_dump(C::$a);
} catch (Error $e) {
    echo "\nException: " . $e->getMessage() . " in " , $e->getFile() . " on line " . $e->getLine() . "\n";
}

try {
    var_dump(C::$p);
} catch (Error $e) {
    echo "\nException: " . $e->getMessage() . " in " , $e->getFile() . " on line " . $e->getLine() . "\n";
}

try {
    unset(C::$a);
} catch (Error $e) {
    echo "\nException: " . $e->getMessage() . " in " , $e->getFile() . " on line " . $e->getLine() . "\n";
}

var_dump(C::$a);
?>