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Re: about a piece of code from drupal 3.0.x [message #175956 is a reply to message #175955]

Thu, 10 November 2011 11:54

alvaro.NOSPAMTHANX
Messages: 277
Registered: September 2010

Karma:

Senior Member

El 10/11/2011 9:43, zhang yun escribió/wrote:
> i don't understand this function .if someone help me explain it ,i
> would appreciate
> the code:
>
> // invoke hook $hook of module $name with optional arguments:
> function module_invoke($name, $hook, $a1 = NULL, $a2 = NULL) {
> $function = $name ."_". $hook;
> if (function_exists($function)) {
> return $function($a1, $a2);
> }
> }
>
> what is it would return ? why write $function( $a1 , $a2);?

The feature is called "variable functions" and it's explained at:

http://www.php.net/manual/en/functions.variable-functions.php

Apparently, the Drupal module API allows to implement certain
functionalities in modules by writing a function with a name in a
certain format:

modulename_hookname()

This function tests whether such function exists for a given module and
calls the function if it's available.

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		about a piece of code from drupal 3.0.x By: zhang yun on Thu, 10 November 2011 08:43
		Re: about a piece of code from drupal 3.0.x By: alvaro.NOSPAMTHANX on Thu, 10 November 2011 11:54

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