Bisherigen Sucheinträge:
overload functions ,
include functions ,
variable functions ,
post functions
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Einige einfache Beispiele für die Verwendung der overload()-Funktion:
Beispiel #1 Eine PHP-Klasse überladen
<?php
class OO {
var $a = 111;
var $elem = array('b' => 9, 'c' => 42);
// Callback-Methode für die Abfrage einer Eigenschaft
function __get($prop_name, &$prop_value)
{
if (isset($this->elem[$prop_name])) {
$prop_value = $this->elem[$prop_name];
return true;
} else {
return false;
}
}
// Callback-Methode für das Setzen einer Eigenschaft
function __set($prop_name, $prop_value)
{
$this->elem[$prop_name] = $prop_value;
return true;
}
}
// Hier überladen wir das OO-Objekt
overload('OO');
$o = new OO;
echo "\$o->a: $o->a\n"; // print: $o->a: 111
echo "\$o->b: $o->b\n"; // print: $o->b: 9
echo "\$o->c: $o->c\n"; // print: $o->c: 42
echo "\$o->d: $o->d\n"; // print: $o->d:
// füge einen neuen Eintrag zum $elem-Array in OO hinzu
$o->x = 56;
// instanziiere stdclass (ist in PHP 4 eingebaut)
// $val ist nicht überladen!
$val = new stdclass;
$val->prop = 555;
// setze "a" als Array mit dem $val-Objekt als Value
// __set() wird dies aber trotzdem dem $elem-Array zuordnen
$o->a = array($val);
var_dump($o->a[0]->prop);
?>
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