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I'm trying to create a rather large and extensive settings page with various options of very similar type.

Since there will be about 20 different fields, and the differences between most of those being simply their ID, I'd like to avoid creating a separate callback for each one.

Is it possible to make a callback with a variable for the settings ID of each of these fields? That way one callback can server various settings fields of the same type.

I've tried using the $args parameter for add_setitngs_feild(), but sadly, it does not work. For example:

add_settings_field('name', 'Field Name', array($this, 'fieldCallback'), 'SettingsGrouP', 'SettingsSection', array("settingID!")); 


function fieldCallback($id)
{
    echo "<input id='" . $id . "'/>";//etc, etc
}

fieldCallback si being called, but the ID of the input is blank.

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3 Answers 3

up vote 2 down vote accepted

The last optional $args argument the you can pass to add_settings_fields() is passed to callback. So it seems you can use same callback just fine.

Hope I am right because I just stumbled onto this two minutes ago because of discussion in chat. :)

PS looked through code and it's indeed relatively recent, before ~2.9 arguments weren't passed.

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Hey, thanks for the reply! I'll check this out immediately. –  Georges Oates Larsen May 19 '11 at 18:56
    
Hmm, doesn't seem to be working, sadly :( I've posted code above in the question –  Georges Oates Larsen May 19 '11 at 19:17
    
@Georges Oates Larsen it's passed as single array... tried var_dump($id); to check? I didn't get to playing with this today but it's highly interesting topic for me so I will definitely get to testing this later. edit I couldn't resist :) quick check and var_dump() inside callback shows that argument is passed as part of array just fine. –  Rarst May 19 '11 at 20:29
    
Changed the callback to: var_dump($id);, and it still came up blank –  Georges Oates Larsen May 20 '11 at 16:42
    
@Georges Oates Larsen I am not sure what the reason it fails for you might be... Are you running current WP version? Also you can try simpler test case first without class and such. –  Rarst May 20 '11 at 17:13

The way Wordpress passes arguments to the callback function here is a bit tricky, the callback function receives the whole $args array as parameter, so you may want to change the function as following:

function fieldCallback(array $args)
{
    echo "<input id='" . $args[0] . "'/>";//etc, etc
}

and you leave add_settings_field as it is.

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In the last (optional) argument $args in add_settings_field() function you can use array('label_for' => 'something') as it is writen in documentation (see http://codex.wordpress.org/Function_Reference/add_settings_field).

So if you want to pass id of your field use 'label_for' for it :)

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