I'm new to WP development. I need to write a hook to check if the currently logged in user is viewing a post listed within a specific category, and then redirect user if they're lacking certain meta data.
I tried creating this function:
add_action('init','check_user_post_category');
however inside that function I was unable to get the post object (I have tried everything I found on the web!)
global $post; // This object is not valid at this time
global $wp; // $wp->request is empty
$_REQUEST; // This var is giving me an empty array! Is this normal??? :(
Could you kindly suggest, what hook is best to use in this case, and how to get the post object? Many thanks!
Use 'wp' hook instead of 'init'.
add_action('wp','check_user_post_category');
Maybe this would work for you.
Related
I have been trying to associate CUSTOM data to each of my WP POSTS using the following piece of code :
if($condition === true){
if ( ! update_post_meta ($post_id, '_someData', $someVariable) ) {
add_post_meta($post_id, '_someData', $someVariable);
}
}
However, seems like the META VALUE is RESET to default i.e. Zero OR Blank. Our WordPress website has around 40 plugins, and I think one of these WordPress plugins, is coming in my way of doing things. All of my logic works fine, on a demo WordPres website. Is there a way for me to have total control to set the META Value for a given POST ? Also, is there a way where I can be notified that the META Key is about to change and then I can decide whether OR not to change the Meta Value ?
Any pointers or reference URL's can be of great help. Thanks !
You only need to call update_post_meta in either scenario. Calling add_post_meta() is not necessary and could be causing this problem.
From the codex:
The function update_post_meta() updates the value of an existing meta key (custom field) for the specified post.
This may be used in place of add_post_meta() function. The first thing this function will do is make sure that $meta_key already exists on $post_id. If it does not, add_post_meta($post_id, $meta_key, $meta_value) is called instead and its result is returned.
I'm using Contact Form 7 in a wordpress site with multiple forms.
I need to direct one form to a different form action url than the others.
I found the reply below for a previous thread but I'm not sure how to go about it.
Can someone specify what exact code needs to be included in "additional settings"
and what the code in functions.php would look like?
Thanks for your help!
reply from diff. thread, which I don't completely understand...
*Yes, you have to change the "action" attribute in the form using this Filter Hook wpcf7_form_action_url. (what would be the code?) You could add the hook into your theme's functions.php and then just process the form data in your ASP page.(code?) *
Since you're not familiar with PHP code at all, I'll give you a bit of a crash course in coding within the Wordpress API.
First off, you need to know the difference between functions and variables. A variable is a single entity that is meant to represent an arbitrary value. The value can be anything. A number, somebody's name, or complex data.
A function is something that executes a series of actions to either send back - or return - a variable, or alter a given variable.
<?php
$a = 1; //Number
$b = 'b'; //String *note the quotes around it*
$c = my_function(); //Call to a function called my_function
echo $a; //1
echo $b; //b
echo $c; //oh, hello
function my_function()
{
return 'oh, hello';
}
?>
Wordpress utilizes its own action and filter system loosely based on the Event-Driven Programming style.
What this means is that Wordpress is "listening" for a certain event to happen, and when it does, it executes a function attached to that event (also known as a callback). These are the "Actions" and "Filters". So what's the difference?
Actions are functions that do stuff
Filters are functions that return stuff
So how does this all fit in to your problem?
Contact Form 7 has its own filter that returns the URL of where information is to be sent by its forms.
So lets look at the basics of a Filter Hook
add_filter('hook_name', 'your_filter');
add_filter is the function that tells Wordpress it needs to listen
for a particular event.
'hook_name' is the event Wordpress is listening for.
'your_filter' is the function - or callback - that is called when the 'hook_name' event is fired.
The link to the previous thread states that the hook name you need to be using is 'wpcf7_form_action_url'. That means that all you have to do is make a call to add_filter, set the 'hook_name' to 'wpcf7_form_action_url', and then set 'your_filter' to the name of the function you'll be setting up as your callback.
Once that's done, you just need to define a function with a name that matches whatever you put in place of 'your_filter', and just make sure that it returns a URL to modify the form action.
Now here comes the problem: This is going to alter ALL of your forms. But first thing's first: See if you can get some working code going on your own. Just write your code in functions.php and let us know how it turns out.
UPDATE:
The fact that you were able to get it so quickly is wonderful, and shows the amount of research effort you're putting into this.
Put all of this in functions.php
add_filter('wpcf7_form_action_url', 'wpcf7_custom_form_action_url');
function wpcf7_custom_form_action_url()
{
return 'wheretopost.asp';
}
As mentioned before, that will affect ALL of your forms. If this is only supposed to affect a form on a given page, you can do something like this:
add_filter('wpcf7_form_action_url', 'wpcf7_custom_form_action_url');
function wpcf7_custom_form_action_url($url)
{
global $post;
$id_to_change = 1;
if($post->ID === $id_to_change)
return 'wheretopost.asp';
else
return $url;
}
All you would need to do is change the value of $id_to_change to a number that represents the ID of the Post/Page you're trying to affect. So if - for example - you have an About Page that you would like to change the Action URL, you can find the ID number of your About Page in the Admin Dashboard (just go to the Page editor and look in your URL for the ID number) and change the 1 to whatever the ID number is.
Hope this helps you out, and best of luck to you.
Great answer #maiorano84 but I think you should check form ID instead of Post. Here is my version.
add_filter('wpcf7_form_action_url', 'wpcf7_custom_form_action_url');
function wpcf7_custom_form_action_url($url)
{
$wpcf7 = WPCF7_ContactForm::get_current();
$wpcf7_id = $wpcf7->id();
$form_id = 123;
return $wpcf7_id == $form_id? '/action.php' : $url;
}
Another thing you might need to disable WPCF7 AJAX. That can be disabled by placing the following code in your theme functions.php
apply_filters( 'wpcf7_load_js', '__return_false' );
You can add actions after a successful submission like the documentation says
Adding a filter will work in the sense that it will change the action on the form but unfortunately it will also break the functionality of the plugin. If you add the filter like other answers suggest the form will keep the spinner state after submission.
You can make the form do something else on submit by using advanced settings such as:
on_submit: "alert('submit');"
more details about advanced settings here.
According to #abbas-arif, his solution works great, but have a limitation. This solution change the form's action on all forms present in post with that ID.
A better solution should be to use directly the form's ID. To get it, whit wordpress >5.2, you can use:
add_filter('wpcf7_form_action_url', 'wpcf7_custom_form_action_url');
function wpcf7_custom_form_action_url($url)
{
$cf7forms = WPCF7_ContactForm::get_current();
$Form = $cf7forms -> id;
switch($Form){
case 1:
return 'destination like salesforce url 1...';
case 2:
return 'destination like salesforce url 2...';
case 3:
return 'destination like salesforce url 3...';
default:
return $url;
}
}
Im very new to WordPress. I was going through Smooth Slider WP Plugin and saw
if ( function_exists( 'get_smooth_slider_category' ) ) { get_smooth_slider_category('Uncategorized'); }
This pretty much gives what I wanted, but not quite. This pulls all the content in the category and what Im after is just the image URL.
My question is whats "function_exists" in wordpress? and I checked get_smooth_slider_category in functions.php file but couldnt find any. Can someone please explain how function_exists works?
function_exists is a PHP function, not limited to WordPress.
From the manual "Checks the list of defined functions, both built-in (internal) and user-defined, for function_name."
It returns true or false on whether or not the function exists. So you can either create a new function before it that does something slightly different, or prevent an error if it doesn't exist (normally because the required file hasn't been included).
This is a PHP function that checks if the passed in name matches any defined functions (either internal, or user defined).
It is a way to check if a function is "available" before calling it.
I wrote a simple twitter connect plugin which needs to display the 'logged in' user's name in the header after he logs in. The function is working properly but I am unable to display the $user variable in my header or anywhere outside the function even though it is assigned global.
Here is the end of the login function:
$user= $Twitter->get_accountVerify_credentials();
print_r($user);
// show screen name (not real name)
$twitter_user = $user->screen_name;
// show profile image url
$twitter_image = $user->profile_image_url;
I can see that it is successful because the $user gets printed, but when I call it in my header.php file the same way I can an error: Notice: Undefined variable: user
Any suggestions?
As opposed to getting wrapped up in the scope of the variables, I'd write a function to get this information. Something like:
function get_twitter_user_name(){
$user= $Twitter->get_accountVerify_credentials();
return $user->screen_name;
}
Then, in the header, where I want to display the name, I'd call the function like so:
<?php echo get_twitter_user_name(); ?>
Depending on the structure of your code, this may look a little different than what I have here, but hopefully this will give you another way of tackling this problem.
I was wondering which is the best approach to get the catgeory ID when listing the posts within a particular category. Normally, the urls look something like this : www.example.com/?cat=4 and it is pretty easy to get the id. However, I really need the urls to be routed like this www.example.com/categories/hotels . wordpress provides an easy way to do the "pretty" routing, however all of the GET paramater information is lost this way. In this case, the $_GET variable is assigned nothing. I need to be able to say $category = $_GET["cat"] or something like that
What is the easiest approach ?
Can you use the Wordpress get_the_category function to grab the ID (from member variable cat_ID) once you're in the template?
See http://codex.wordpress.org/Function_Reference/get_the_category
e.g.
foreach((get_the_category()) as $category) {
$id = $category->cat_ID;
// do something with $id
}
The thing is that the guy might not really want to associate categories with post ids. In this case, there's the global $wp->query_vars array that contains all the data coming from the GET request even when the routing has been "prettified"
What about the category base setting in the backend? "Configuration" > "Permalinks" and there the last paragraph. See here for docs.