#42810 [NEW]: Returning References example is unclear
| From: | aharvey@php.net | Date: | Mon, 01 Oct 2007 06:14:41 +0000 |
| Subject: | #42810 [NEW]: Returning References example is unclear | ||
| Groups: | php.doc.bugs | ||
| Request: | Send a blank email to doc-bugs+get-49@lists.php.net to get a copy of this message | ||
From: aharvey@php.net
Operating system: Irrelevant
PHP version: Irrelevant
PHP Bug Type: Documentation problem
Bug description: Returning References example is unclear
Description:
------------
The example for the "Returning References" page
<http://us3.php.net/manual/en/language.references.return.php>
handwaves the
fact that $found_var needs to be set to either a reference or concrete
value within the /* ...code... */ block, which is a potential source of
confusion for newer programmers, judging by the conversation I just had on
##php. The following may be a clearer and more complete example for users
to demonstrate the concept:
<?php
class C {
public $value = 42;
public function &getValue() {
return $this->value;
}
}
$c = new C;
$myValue = &$c->getValue(); // $myValue is a reference to $c->value,
which is 42.
$c->value = 2;
echo $myValue; // prints the new value of $c->value, ie 2.
?>
--
Edit bug report at http://bugs.php.net/?id=42810&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42810&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42810&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42810&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=42810&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=42810&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=42810&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=42810&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=42810&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=42810&r=support
Expected behavior: http://bugs.php.net/fix.php?id=42810&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=42810&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=42810&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=42810&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42810&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=42810&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=42810&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=42810&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=42810&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=42810&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=42810&r=mysqlcfg