php4与php5的区别小结(配置异同)

$tempobj=$obj->method_a();
$tempobj->method_b();

<?php
class MyDestructableClass {
function __construct() {
print "In constructor/n";
$this->name = "MyDestructableClass";
}

function __destruct() {
print "Destroying " . $this->name . "/n";
}
}

$obj = new MyDestructableClass();
?>

<?php
var_dump(strrpos(‘ABCDEF',‘DEF')); //int(3)
var_dump(strrpos(‘ABCDEF',‘DAF')); //bool(false)
?>
实例： 没有属性的对象不再被当成“empty”
<?php
class test { }
$t = new test();
var_dump(empty($t)); // echo bool(false)
if ($t) {
// Will be executed
}
?>

<?php
//works with no errors:
$a = new a();
class a {
}
//throws an error:
$a = new b();
interface c{
}
class b implements c {
}
?>