Req #51280 [Opn->Bgs]: Calculate expression before using it as argument
| From: | hholzgra@php.net | Date: | Sun, 21 Mar 2010 20:07:08 +0000 |
| Subject: | Req #51280 [Opn->Bgs]: Calculate expression before using it as argument | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-148817@lists.php.net to get a copy of this message | ||
Edit report at http://bugs.php.net/bug.php?id=51280&edit=1
ID: 51280
Updated by: hholzgra@php.net
Reported by: olamedia at gmail dot com
Summary: Calculate expression before using it as argument
-Status: Open
+Status: Bogus
Type: Feature/Change Request
Package: *General Issues
PHP Version: 5.3.2
New Comment:
Expected behavior, see:
http://php.net/manual/en/language.operators.assignment.php
[...]
The value of an assignment expression is the value assigned.
That is, the value of "$a = 3" is 3.
[...]
Previous Comments:
------------------------------------------------------------------------
[2010-03-12 08:45:19] olamedia at gmail dot com
Description:
------------
Calculate expression before using it as argument in function and with
echo.
Test script:
---------------
class p{
protected $_name = null;
protected $_value = null;
public function __construct($name, $value){
$this->_name = $name;
$this->_value = $value;
}
public function is($value){
$this->_value = $value;
return $this;
}
public function __toString(){
return "$this->_name = $this->_value";
}
}
class a{
protected $_a = null;
public function __set($name, $value){
$this->_a[$name] = new p($name, $value);
return $this->_a[$name];
}
public function __get($name){
if (!isset($this->_a[$name])){
$this->_a[$name] = new p($name, null);
}
return $this->_a[$name];
}
}
class q{
public function where($var){
echo $var;
}
}
$a = new a();
echo $a->x = 2; // "2" (Expected: "x = 2")
echo "\r\n";
echo $a->x; // "x = 2"
echo "\r\n";
$q = new q();
$q->where($a->x = 2); // "2" (Expected: "x = 2")
echo "\r\n";
$q->where(($a->x = 2)); // "2" (Expected: "x = 2")
Expected result:
----------------
x = 2
x = 2
x = 2
x = 2
Actual result:
--------------
2
x = 2
2
2
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=51280&edit=1