On 02/21/2012 03:18 PM, Ralf Lang wrote:
In PHP I would rather do
$mother = $baby->getMother();
if ($mother) {
$granny = $mother->getMother();
if ($granny) {
$granny_name = $granny->getName();
}
}
because I have no way to catch if $mother or $granny cannot be retrieved.
There is a way:
1 <?php
2 class NonCallable {
3 public function __call($meth, $args) {
4 throw new Exception("$meth does not exist");
5 }
6 }
7
8 class Foo {
9 protected $bar;
10 public function __construct($bar=NULL) {
11 $this->bar = $bar;
12 }
13 public function bar() {
14 if($this->bar) {
15 return $this;
16 }
17 return new NonCallable;
18 }
19 }
20
21 class Bar {
22 public function bark() {
23 echo 'bark';
24 return $this;
25 }
26 }
27
28 $foo = new Foo;
29
30 try {
31 $foo->bar()->bark();
32 } catch(Exception $e) {
33 echo 'something went wrong';
34 return 1;
35 }
36
Liebe Grüße,
Flavius
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