ID: 35747
Updated by: [EMAIL PROTECTED]
Reported By: ckrack at i-z dot de
-Status: Open
+Status: Bogus
Bug Type: Feature/Change Request
Operating System: Any
PHP Version: 5.1.1
New Comment:
You can use Reflection API for that.
Previous Comments:
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[2005-12-20 17:34:11] ckrack at i-z dot de
Description:
------------
I'd like to request a function to be able to create objects
dynamically.
I have a classname as string and an array containing parameters. The
parameters can be imagined as fetched from func_get_args().
I now want to create an object out of these two, similar to how i would
call a method or function using call_user_func_array().
There are three ways to implement this in PHP code, none of them are
nice:
- force classes to implement an 'init' function which receives the
paramarray instead of the constructor. bad, because classes need to be
changed.
- use eval to create a statement like "new $classname($param1, $param2,
$param3,....)". Eval however is bad and slow.
- use a switch to check how many params are available, write a
statement to create a class with each number of parameters. iirc there
are about 180 params allowed (theoretically), so to cover all
possibilitys, one would have to write about 180 cases ;)
Reproduce code:
---------------
function make_object($name, $params)
{
// make object instance
if (is_array($params)) {
// make object with multiple parameters
switch(count($params)){
case 0:
$obj = new $name();
break;
case 1:
$obj = new $name($params[0]);
break;
case 2:
$obj = new $name($params[0], $params[1]);
break;
//etc,.......
default:
// DIRTY DIRTY but not possible in another way: we create
the statement to call the class with multiple params
$eval = "new ".$name."(";
$eval .= implode(",", $params);
$eval .= ")";
eval("\$obj = $eval;");
} // switch
} else {
// create object without parameters
$obj = new $name();
}
return $obj;
}
Expected result:
----------------
I want a function named something like "create_user_object_array" which
receives a classname and a array containing parameters which are passed
to the contructor of the class.
Actual result:
--------------
The provided code does what it should, but it is not in a nice style.
lacking the possibilities.
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Edit this bug report at http://bugs.php.net/?id=35747&edit=1
