Variable functions with namespaces in PHP

Question

I'm wondering if there is a way to call variable functions with namespaces. Basically I'm trying to parse tags and send them to template functions so they can render html`

Here's an Example: (I'm using PHP 5.3)

 // Main php file
require_once 'template.php';
foreach (array("javascript","script","css") as $tag) {
    echo template\$tag();
}

 // template.php
 namespace template;

 function javascript() { return "Hello from javascript"; }
 function css() { return "Hello from css"; }
 function script() { return "Hello from script"; }

I keep getting Parse error: syntax error, unexpected T_VARIABLE, expecting T_STRING in ... on line 76

Thanks! Matt

You're using the Variable functions wrong, it needs to be a variable, not a string and variable. — hakre
– hakre, Commented Feb 14, 2012 at 9:41

hakre · Accepted Answer · 2012-02-14 09:40:03Z

7

This will also work, no need for call_user_func, just use the Variable functions^Docs feature:

require_once 'template.php';

$ns = 'template';
foreach (array('javascript', 'script', 'css') as $tag) {
    $ns_func = $ns . '\\' . $tag;
    echo $ns_func();
}

edited Feb 14, 2012 at 9:40

hakre

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answered Aug 9, 2009 at 16:52

GZipp

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Comments

Andrew Moore · Accepted Answer · 2012-02-15 17:44:10Z

5

Sure you can, but unfortunately, you need to use call_user_func() to achieve this:

require_once 'template.php';
foreach (array("javascript","script","css") as $tag) {
    echo call_user_func('template\\'.$tag);
}

Namespaces in PHP are fairly new. I'm sure that in the future, they will fix it so we won't require call_user_func() anymore.

edited Feb 15, 2012 at 17:44

answered Aug 9, 2009 at 1:14

Andrew Moore

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1 Comment

Matt Over a year ago

Needed a parameter. Here's how to do that. echo call_user_func('template\\'.$tag, $params);

Community · Accepted Answer · 2023-11-13 20:22:11Z

1

try with

 // Main php file
require_once 'template.php';
foreach (array("javascript","script","css") as $tag) {
    call_user_func("template\\$tag"); // As of PHP 5.3.0
}

 // template.php
 namespace template;

 function javascript() { return "Hello from javascript"; }
 function css() { return "Hello from css"; }
 function script() { return "Hello from script"; }

you have some info here

edited Nov 13, 2023 at 20:22

CommunityBot

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answered Aug 9, 2009 at 1:14

Gabriel Sosa

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3 Comments

Andrew Moore Over a year ago

::? Really... Someone either didn't do their homework or simply has no understanding of the difference between a namespace and a static member of a class.

Matt Over a year ago

Thanks! Only slightly off though! I appreciate the help though.

Gabriel Sosa Over a year ago

@Andrew you were right. I messed it up when is pasted the code. thank you

Maxim · Accepted Answer · 2012-03-12 20:07:20Z

0

Try this

$p = 'login';
namespace App\login; 
$test2 = '\App\\'.$p.'\\MyClass';

$test = new $test2;

answered Mar 12, 2012 at 20:07

Maxim

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