[PHP-DOC] #24105 [Opn]: class member functions aren't first class data objects

[knotwell at ix dot netcom dot com]

 ID:              24105
 User updated by: knotwell at ix dot netcom dot com
 Reported By:     knotwell at ix dot netcom dot com
 Status:          Open
 Bug Type:        Documentation problem
 PHP Version:     4.3.1
 New Comment:

So the methodology for this is (what I presume to be)introspection, if
possible, I'd suggest the addition to the documentation address the
following similar case as well:

class z {
   function b($x,$y) {
       return $x*$y;
   }
}

$a = new z;
$b = $a->b;
$b(3,4) --> an error from the runtime system.


Previous Comments:
------------------------------------------------------------------------

[2003-06-09 23:28:34] [EMAIL PROTECTED]

It's by design.
You're supposed to pass a string there, see below:

<?php

function generic_data_handler($specializedFn,$specializedFnData) {
    return $specializedFnData->$specializedFn($specializedFnData);
}
 
class z {
   var $x = 10;
   var $y = 4;

   function _mult($me) {
       return($me->x * $me->y);
   }
    
   function aStupidlyContrivedExample() {
       return generic_data_handler('_mult', $this);
   }
}
 
$a = new z;
print $a->_mult($a);

// an error from the runtime system
print $a->aStupidlyContrivedExample();

?>


------------------------------------------------------------------------

[2003-06-09 19:32:10] knotwell at ix dot netcom dot com

I've checked the documentation, but it doesn't address this
issue.  As a result, I'm unsure if this is a bug or by design.

Anyhow, it appears class functions aren't first class data objects. 
I've included a short example leading to a
"Call to undefined function" message as a example:

<?php

function generic_data_handler($specializedFn,$specializedFnData) {
    return $specializedFn($specializedFnData);
}

class z {
   var $x = 10;
   var $y = 4;

   function _mult($me) {
       return($me->x * $me->y);
   }

   function aStupidlyContrivedExample() {
       return generic_data_handler($this->_mult,$this); 
   }
}

$a = new z;
print $a->_mult($a);             

// an error from the runtime system
print $a->aStupidlyContrivedExample();   

?>

Apologies in advance if this is common knowledge or not a bug.

------------------------------------------------------------------------


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Edit this bug report at http://bugs.php.net/?id=24105&edit=1


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