<?php
class Alumn {
private $name;
private $mat;
function getName()
{
return $this->name;
}
function getMat()
{
return $this->mat;
}
}
$a = new Alumn();
if($a->getName() == NULL)
print "Alumn->name is NULL\r\n";
if($a->getMat() == NULL)
print "Alumn->mat is NULL";
?>
PD9waHAKY2xhc3MgQWx1bW4gewogIHByaXZhdGUgJG5hbWU7CiAgcHJpdmF0ZSAkbWF0OwogIGZ1bmN0aW9uIGdldE5hbWUoKQogIHsKICAgIHJldHVybiAkdGhpcy0+bmFtZTsKICB9CiAgZnVuY3Rpb24gZ2V0TWF0KCkKICB7CiAgICByZXR1cm4gJHRoaXMtPm1hdDsKICB9Cn0KICRhID0gbmV3IEFsdW1uKCk7CiBpZigkYS0+Z2V0TmFtZSgpID09IE5VTEwpCiAgICBwcmludCAiQWx1bW4tPm5hbWUgaXMgTlVMTFxyXG4iOwogaWYoJGEtPmdldE1hdCgpID09IE5VTEwpCiAgICBwcmludCAiQWx1bW4tPm1hdCBpcyBOVUxMIjsKPz4=