I'm trying to set the default Image Link URL for my WP users so that it doesn't include the url link as a default. I've done some research, and I know the function is in the wp-admin/options.php:
update_option('image_default_link_type','file');
Rather than mess with the core files, I'd like to put this into the functions.php, but never know the proper way to implement stuff like this! This is what I have so far in my functions.php:
<?php
update_option('image_default_link_type','none');
?>
This obviously doesn't work: it needs the proper setup! What is the correct way to implement this in functions.php?
Also: I'd like to know the strategy for figuring out how to implement functions like this in the future by myself? For example, I never know whether or not I'm supposed to use add_filter or do_action, and how I need to pass the parameters. I've yet to find a book or post out there that explains this very well, and can show me by example. Any good leads on this would be awesome too!
Start with the Wordpress codex. Visit the plugin API (which is really what you are doing) that explains Hooks, Actions and Filters. Then see the Action Reference which provides your list of hooks.
Here you will find the hook update_option_OPTIONNAME. Description from codex:
Runs after a WordPress option has been update by the update_option
function. Action function arguments: old option value, new option
value. You must add an action for the specific options that you want
to respond to, such as update_option_foo to respond when option "foo"
has been updated.
Adding code from asker's comment:
function inventory_linkurl_setting() {
update_option('image_default_link_type','none');
}
add_action('admin_init', 'inventory_linkurl_setting'); ?>
Related
Recently I am trying to understand the codebase of a custom wordpress plugin.
Some syntax of add_action() looks confusing to me.
add_action( 'after_plugin_row_wc-smart-cod/wc-smart-cod.php', array( $this, 'add_warning' ) );
I know the first parameter of add_action() is the name of the action to which the function 'add_warning' of $this object is hooked.
But in the above example the first parameter is the name of a php file, instead of an action name.
What does it mean ?
Thanks.
The first parameter to an action is a string. Generally it is something like wp_footer or before_send_email but there really isn't any restrictions on it. For instance, in my company's code, we often use slashes to give the action a (fake) namespace such as company/plugin-name/class/action but this is 100% arbitrary from WordPress's perspective.
Back to your example, however, there actually is a specific pattern from WordPress for that specific hook which you can see here. Every plugin in WordPress has an "entrance" or "plugin" file that boots up the entire plugin. Because most plugins live in a sub-folder, it is often plugin-name/plugin-name.php or plugin-name/index.php but it is ultimately up to the plugin author.
Most people use that specific action to add special messages to their own plugin's row in the general listing of plugins. The plugin you mentioned is using it to give a warning to users with a very specific version of the plugin installed.
I'm using the All-In-One Video Player plugin and want to alter its behaviour by listening to events that the player emits and taking actions based on them.
I contacted plugin's support team and got a very good response that I'm sure would mean something to someone who understands WordPress - I'm not one of those people.
The support team suggested using the action hook aiovg_player_footer. It looks like I have to implement that function, but I have no idea where to write that code. Is there a specific file that I need to create / update in order to get implement this function.
My function will need to alter the HTML that the plugin produces. Is this just a case of doing something like
echo '<script>console.log("helo");</script>' ?
You should add the following code in functions.php file located in the root of your theme directory:
function so61638829_aiovg_player_footer()
{
// Do something
}
add_action('aiovg_player_footer', 'so61638829_aiovg_player_footer');
I am working in worpress front page.
I want to add a plugin to the page at a specific location manually but adding the code to the page myself.
I basically want to include a plugin in a certain page on a certain location. So I'm create a div...
<div id="plugin-holder">
**Plugin-will-appear-here-with-this-code**
</div>
Don't anyone know how this is done please?
Thanks
If you're wanting a plugin to appear somewhere, you'll be looking for "shortcode" functionality.
This is actually surprisingly easy to code, check out the examples in the Codex under Shortcode API - ie:
function bartag_func( $atts ) {
// ... do more things here ...
return "text to replace shortcode";
}
add_shortcode( 'bartag', 'bartag_func' );
Once you've called these functions you can use [bartag] in code and it will run your function and replace the shortcode with the generated text your function returns.
If you're adding shortcode functionality to your site, it generally makes most sense to code a really simple plugin and put it in that. The reason why this works best is that, over time, it's really easy to forget and upgrade a theme by mistake (or even change to a new theme) and thus break your site by losing your custom code in your former functions.php. Surprisingly, this is pretty easy to achieve and only requires some specially formatted comments at the top of your plugin file and a little common sense in coding - there are many tutorials and "how to"s around!
Here's a useful shortcode tutorial: http://www.reallyeffective.co.uk/archives/2009/06/22/how-to-code-your-own-wordpress-shortcode-plugin-tutorial-part-1/
You should add the relevant plugin code to functions.php.
I suspect you'll want to use some conditional tags, like is_home() to pinpoint your location. But maybe not, depending on what you are trying to do,
Also, if you're trying to to insert from a pre-existing plug-in, make sure you remove the register_activation_hook or activate_pluginname action.
If your plugin supports a sidebar widget you can simply "widgitize" the div tag that you wish to insert the plugin into.. Google the term and you are gonna find many resources.
I would like to create a plugin that uses the contact form 7 hook, wpcf7_admin_after_mail. I want to use the plugin to interface with a CRM system. What I have thus far is the following:
//plugin header here
function add_to_CRM( $cf7 )
{
if (isset($cf7->posted_data["your-message"]))
{
full_contact($cf7);
} else {
quick_quote($cf7);
}
return $cf7;
}
add_action('wpcf7_admin_after_mail', 'add_to_CRM');
//other functions here
I can't seem to get this working. I can't even get the hook to work and do something like mail me. Anybody have any idea what I'm doing wrong here. Since I have limited Wordpress experience I might me missing the boat completely with what I'm trying to do here. I've Googled for answers to no end.
EDIT: I ended up adding this to the theme's functions.php file and it works perfectly. Thing is, I want to get it working as a plugin. Any help will be appreciated.
Try delaying the add_action() call, something like;
add_action('init', create_function('',
'add_action("wpcf7_admin_after_mail", "add_to_CRM");'));
This actually registers your CF7 hook once WordPress is ready (which is nearer the time functions.php gets loaded in).
I asked this question over in the actual tutorial, but not sure I'll get an answer anytime soon as it's almost 2 months old... so I'll take a gander here...
Tutorial is here: Build a WordPress Plugin to Add Author Biographies to your Posts
To sum up the tutorial and what the problem is, The tutorial adds an Author Bio on to the end of the content like so (the short version):
function x($content) {
return $content . "Author Bio";
}
add_action('the_content','x');
The Problem:
When someone uses:
$z = apply_filters('the_content', 'some content here');
echo $z;
The Author Bio will end up applied to $z and if $z is echoed out in the middle of some page… the Author Bio would be in the middle of some page… correct? (it's correct because I've tested it...)
Is there a better way to apply something to the end/under/below the_content hook? other than add_action(‘the_content’, ‘some_function’) because this to me seems evil...
or is apply_filters(‘the_content’, ‘some content here’) not the norm or something developers shouldn't be using inside their WordPress templates…? (which seems pretty much the norm, at least upon Google-ing formatting "the_content" outside the loop)...
Using apply_filters('the_content','some content here'), while it may not be 'the norm' (I don't know. I haven't seen it before, but if I needed formatted text, that's what I'd do), is a perfectly valid use of filters to get some text formatted like the content. Unfortunately, there's no better way to append something to content from a plugin. That is just the way these things work.
However, there's a (less than optimal) way of circumventing this. As part of the setup/install process for your plugin, have the user insert a custom function call, action, or filter into their theme. I know several plugins that do this, so it's not all that uncommon. Something like this:
do_action('my_super_awesome_bio_hook');
Would allow you to hook in without worrying about adding a bio to unexpected (and unintended) content. Even better would be inserting a filter:
echo apply_filters('my_super_awesome_bio_filter_hook','');
That would allow your plugin to modify the bio, but also allow the one using the plugin to override it if necessary (like on pages where they're just using excerpts, like search results, etc.).
Hope this helped.
Also, one minor addendum: you should be using add_filter, not add_action to append the Author Bio. add_action still works, but it's a filter you want to be using.
I bumped into a similar issue with a widget I'm dev'ing. I just found this:
http://codex.wordpress.org/Function_Reference/wpautop
Which I'm now going to use instead of add_filters('the_content'). I want the WYSIWYG formatting but I don't want things append to my content because it's not traditional content anymore.