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validate_channelname

Called when creating a new channel or changing the channel name in mod/settings.php

Hook data consists of an array

    array(
        'name' => supplied name
    );

    If the hook handler determines the name is valid, do nothing. If there is an issue with the name,
    set $hook_data['message'] to the message text which should be displayed to the member - and the name will
    not be accepted.


    Example:
    

        if(mb_strlen($hook_data['name']) < 3)
            $hook_data['message'] = t('Name too short.');