php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Doc Bug #65381 Example #1 is_callable() with a mistake
Submitted: 2013-08-03 11:48 UTC Modified: 2013-08-08 08:54 UTC
From: jortsc at gmail dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: Irrelevant OS: Windows 7
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: jortsc at gmail dot com
New email:
PHP Version: OS:

 

 [2013-08-03 11:48 UTC] jortsc at gmail dot com 
Description:
------------
---
From manual page: http://www.php.net/function.is-callable#refsect1-function.is-
callable-examples
---
I'm studying for the ZCE and I found what it seems a mistake. This code does not 
return true, returns false. I think the second parameter has to set to true.

I hope it will be useful.
Greetings.

Test script:
---------------
function someFunction() 
{
}

$functionVariable = 'someFunction';

var_dump(is_callable($functionVariable, false, $callable_name));  // bool(true)

echo $callable_name, "\n";  // someFunction

It shows:
bool(false) someFunction

function someFunction2() 
{
}

$functionVariable = 'someFunction2';

var_dump(is_callable($functionVariable, true, $callable_name));  // bool(true)

echo $callable_name, "\n";  // someFunction

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2013-08-07 23:44 UTC] mfonda@php.net
-Status: Open +Status: Not a bug
 [2013-08-07 23:44 UTC] mfonda@php.net 
The example code on the manual page and the code below both produce the correct 
result, bools(true).

Double-check your test script to make sure there are no typos. If you copy/pasted 
the example from the manual, perhaps your editor messed things up when pasting. A 
misspelling of 'someFunction' in your test script would result in is_callable 
returning false.
 [2013-08-08 08:54 UTC] jortsc at gmail dot com 
It was due at the fact that is_callable() don't handle namespaces, my script in 
header looks like:
<?php 
namespace Cert;

function algunaFuncion() 
{
      echo "Desde alguna funcion. . .";
}

$variableFuncion = __NAMESPACE__.'\algunaFuncion';//Now I added the namespace 
constant

var_dump(is_callable($variableFuncion, false, $nombre_a_llamar));  // bool(true)

echo $nombre_a_llamar, "\n";
?>

Prepending namespace constant all works fine.
I didn't think that namespace would affect to is_callable() function.
I know one more thing...

Thank you very much.
 
PHP Copyright © 2001-2026 The PHP Group
All rights reserved. 		Last updated: Tue Oct 06 07:00:02 2026 UTC