Private functions and variables are only visible to members of the
current class.
<?php
class cia {
private $agents = array();
function remove_secret_ops($agent) {
return $agent != 'Sterling';
}
function get_agents() {
return array_filter(
$this->agents,
array($this,
'remove_secret_ops')
);
}
function add_agent($name) {
array_push($this->agents, $name);
}
}
class cia_administration extends cia {
function __construct() {
$this->add_agent('Sterling');
$this->add_agent('Zeev');
$this->add_agent('Andi');
$this->add_agent('Rasmus');
$this->add_agent('Thies');
}
}
$cia = new cia_administration;
$pubagents = $cia->get_agents();
$allagents = $cia->agents;
$secretops = array_diff($allagents,
$pubagents);
foreach ($secretops as $sop) {
echo "$sop is a undercover spy, ";
echo "let's assasinate him! ";
echo "Viva la Perl!\n<br />\n";
}
?>
