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Questions tagged [php]

For questions about the server-side programming language that the WordPress core, plugins and themes are written in. Questions about using PHP outside a WordPress context are off-topic but might be asked on Stack Overflow.

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134 votes
14 answers
587k views

How to get URL of current page displayed?

I want to add custom PHP code to ensure that whenever a page on my site loads in my browser, the URL of that page is echoed to the screen. I can use echo get_permalink(), but that does not work on ...
cag8f's user avatar
  • 1,917
94 votes
11 answers
123k views

What are PHP extensions and libraries WP needs and/or uses?

Codex loosely only mentions PHP version in server requirements, however PHP can be configured in pretty wide range of excluding/including different parts. What are extensions/libraries that: are ...
Rarst's user avatar
  • 99.7k
71 votes
7 answers
109k views

What is the correct way to use WordPress functions outside WordPress files?

I read about 2 methods for initializing WordPress function outside of WordPress files so We can use these functions on any page or website outside the WordPress blog. Which one of these 2 methods is ...
alhoseany's user avatar
  • 1,201
66 votes
3 answers
134k views

Allow HTML in excerpt

Here is my excerpt code. // Generate custom excerpt length function wpbx_excerpt_length($length) { return 300; } add_filter('excerpt_length', 'wpbx_excerpt_length'); How do I allow html like <...
user32447's user avatar
  • 835
65 votes
8 answers
87k views

How to get WordPress Time Zone setting?

Can someone tell me how to get the time zone that is set in the WordPress Admin? For example, if the blog is set to Eastern time, I need this exact string to print out: US/Eastern This is for a ...
user1462's user avatar
  • 1,294
51 votes
11 answers
157k views

Check if current page is the Blog Page

I'm new to WordPress. I am looking for a way to check if current page is the blog page in the code of the header file. I've checked but I can't find a way. Help me, Pls.
KarSho's user avatar
  • 676
51 votes
7 answers
153k views

how to get page id of a page using page slug

I'm pretty new to WordPress and I was wondering if I could get a page id with its slug. Is it possible please let me know?
freaky's user avatar
  • 613
46 votes
4 answers
233k views

Show all terms of a custom taxonomy?

I made a few custom taxonomies and I need to show ALL the terms from it, what I achieved so far is showing the taxonomies that are selected/chosen in a custom post type but I need all of them to show, ...
David H's user avatar
  • 751
46 votes
4 answers
270k views

How to set and use global variables? Or why not to use them at all

UPDATE: My original question has been solved, but this is turning into a valid discussion about why not to use global variables, so I am updating the question to reflect that. The solution was <?...
JPollock's user avatar
  • 1,248
46 votes
4 answers
35k views

What are the differences between WPINC and ABSPATH?

It's common for plugin developers to protect their plugins from direct access. I saw two ways to do that: if ( ! defined( 'WPINC' ) ) die; and if ( ! defined( 'ABSPATH' ) ) exit; What are the ...
Daniel's user avatar
  • 1,206
43 votes
9 answers
73k views

Sending the reset password link programatically

I have this manually created page: $user_login = sanitize_text_field( $_GET['user_login'] ); if ( username_exists( $user_login ) || email_exists($user_login) ) { ?> <!--Everything has been ...
Nimbuz's user avatar
  • 601
40 votes
1 answer
107k views

How to add product in woocommerce with php code [closed]

I want to add products with PHP code like below: $post_information = array( 'post_title' => 'new item shop', 'post_content' => 'this is new item shop', 'post_type' => 'post', '...
Hossein Hashemi's user avatar
38 votes
2 answers
87k views

what is correct way to hook when update post

i try to hook when post is updated but all hook i try never executed except updated_post_meta add_action('updated_post_meta', 'my_function'); function my_function($post_id) { echo 'This is ...
rusly's user avatar
  • 483
38 votes
6 answers
8k views

Using OOP in themes

I see a lot of plugins making use of object-oriented coding when there isn't really necessary. But what's even worse is that theme developers are starting to do the same thing. Commercial themes and ...
onetrickpony's user avatar
  • 13.6k
35 votes
3 answers
10k views

How exactly do automatic updates work?

I received an email this morning stating that my Wordpress site had been automatically updated to the latest version. I knew about the feature but I've always wondered exactly how it works. PHP isn't ...
DisgruntledGoat's user avatar
31 votes
5 answers
81k views

How to update custom fields using the wp_insert_post() function?

The WordPress function is used for submitting data programatically. Standard fields to submit to incude the content, excerpt, title, date and many more. What there is no documentation for is how to ...
Robin I Knight's user avatar
31 votes
5 answers
3k views

Should all plugins be encapsulated in a Class?

When developing a plugin should the functions be grouped together into a Class to avoid namespace conflicts? Does using classes create performance overheads for PHP? If there is a performance hit, ...
Jamie's user avatar
  • 533
30 votes
6 answers
14k views

Running WP-Cron on Multisite networks the right way?

I have WordPress Multisite with several sites. I set up DISABLE_WP_CRON to true in my wp-config.php. If we set up cron task with wget or curl we have 30 sec rule to execute PHP script. It's so small ...
Kolya Korobochkin's user avatar
30 votes
1 answer
38k views

How to create custom 401, 403 and 500 error pages?

When a 404 error is encountered, a 404.php template file can be used to render a custom error message. This is documented in the Template Hierarchy article. My aim is to create custom error pages ...
henrywright's user avatar
  • 3,067
28 votes
3 answers
59k views

Most efficient way to add javascript file to specific post and/or pages?

I am wondering what the most efficient method is to add a javascript file specifically for a post and/or page. Here are a few solutions I came up with: Switch to HTML editing view and post your ...
mousesports's user avatar
28 votes
5 answers
3k views

Why have <?php and ?> on every line

I've seen this convention pretty much everywhere, and, at times, it comes close to driving me nuts: <?php //The loop ?> <?php while ( have_posts() ) : the_post(); ?> <?php ...
Indigenuity's user avatar
27 votes
2 answers
123k views

How to return number of found rows from SELECT query

I wrote a function which is supposed to return the number of rows found in a SELECT query but it always either seems to return 0 or an array. I have been messing around with this for about an hour now ...
Swen's user avatar
  • 1,374
26 votes
2 answers
31k views

Getting only direct child pages in WordPress with get_pages

I am trying to fetch all direct children of a page. But I am getting all children and grand children as well. Any ideas? PHP Source: $args = array( 'child_of' => $post->ID, '...
lejahmie's user avatar
  • 373
24 votes
5 answers
36k views

the_date() not working

I am using wordpress 3.2 and I did a query post like this: <?php query_posts("posts_per_page=1post=type&page=post_parent=10");?> Then I try to echo out the date of this post I queried like ...
zachdyer's user avatar
  • 343
24 votes
1 answer
65k views

How do I use WP_query with multiple post IDs?

I want to query multiple posts with an array of IDs (note: I am querying a custom post type). Here's what I have, which isn't working: $myarray = array(144, 246); $args = array( 'post_type' =>...
DaveP's user avatar
  • 349
24 votes
2 answers
57k views

Query multiple custom post types in single loop

I'm aware there are several other posts that cover similar ground to what I'm about to ask. I have three custom post types running, in addition to 'posts'. I want to run a loop that pulls all posts ...
dannyw24's user avatar
  • 451
24 votes
2 answers
26k views

How can I see all the actions attached to an "add_action" hook?

I'm working with the admin bar and trying to debug some of the menus and their priorities. I know several callbacks get bound to actions, such as this one: add_action( 'admin_bar_menu', '...
cwd's user avatar
  • 1,852
24 votes
2 answers
12k views

How can I use WordPress functions in my stylesheet?

I have my style.php file looking like this. <?php header('Content-Type: text/css');?> #div{ background:<?php echo get_option('bgcolor');?>; } This does not work, but when I do this ...
Ronny K's user avatar
  • 581
23 votes
10 answers
57k views

Disable email notification after change of password

I want to disable the email notification if a user or an admin changes the password of a user. After some Googling I came to find that I need to create a plugin and overwrite the ...
Interactive's user avatar
21 votes
1 answer
23k views

How to include checkbox in widget backend form?

I'm trying to include a checkbox in my widget back end. But I cannot get the value (on or off) after the user submits it. I thought the value would be stored in "esc_attr( $check )" (as it is when ...
Lisandro Vaccaro's user avatar
20 votes
1 answer
30k views

Setting $_SERVER['HTTPS']='on' prevents access to wp-admin

First off my server is sitting behind a load balancer. My SSL certificate sits on the load balancer and handles HTTPS. The data coming in on port 443 is forwarded to the Wordpress server using HTTP ...
nu everest's user avatar
19 votes
7 answers
40k views

Converting timestamps to local time with date_l18n()

I've got a WordPress cron job that sends an email periodically and saves the timestamp when it was sent as an option, and I'd like to display a date on a settings page. Something like, "The last ...
Andrew Bartel's user avatar
19 votes
4 answers
3k views

How to deprecate a function used in a plugin?

One of the functions I'm using in my plugin is polluting the global scope with a name that could collide with another function (used in another plugin). So, I guess I should deprecate it. But how ...
henrywright's user avatar
  • 3,067
18 votes
7 answers
9k views

Inserting terms in an Hierarchical Taxonomy

I'm really having a few issues with inserting terms. Here is my scenario: I have a taxonomy called veda_release_type: //Release Type and Region $labels = array( 'name'=> _x('...
Manny Fleurmond's user avatar
18 votes
1 answer
87k views

What is the meaning of %s, %1$s etc.? [closed]

From a Q&A Thread I've came to meet with some old things, but I'm afraid, I found myself in a condition that, I still don't know the meaning of them and don't know why to use them. %1$s - (found ...
Mayeenul Islam's user avatar
17 votes
3 answers
77k views

get current category ID php

I'm trying to get category ID of the current archive displayed. I tried: // category (can be a parent category) $current_cat_ID = get_query_var('cat'); // print_r ($current_cat_ID); It doesn't ...
user avatar
17 votes
3 answers
143k views

How to get permalink and title from post ID?

I have stored an array of post IDs and I would like to list the posts as links, meaning I need to get the title and permalink for the post ID - $id. The list should be echoed out by the following if ...
sarytash 's user avatar
  • 1,789
17 votes
2 answers
6k views

To close or not to close php

I have read that it is advised (especially with php 7) to not close the php files with ?> Many of my WP php files end like this: <?php get_sidebar(); ?> <?php get_footer(); ?> Should ...
IXN's user avatar
  • 916
17 votes
4 answers
143k views

How to correctly add Javascript in functions.php

I would like to remove some ugly looking arrows that are standard on cart buttons in WooCommerce. To achieve this, I found a tip of adding the following code, which should remove the arrows when the ...
user2806026's user avatar
17 votes
4 answers
30k views

How to manually fix the WordPress gallery code using PHP in functions.php?

It's been talked many times that Wordpress outputs some really bad code for the built-in gallery function. This is the core code responsible for the gallery output (in /wp-includes/media.php): ...
its_me's user avatar
  • 4,502
17 votes
4 answers
16k views

User registration followed by automatic login

I am using a plugin modified for my purposes. What I am after is after the user has registered for it to automatically log them in and return them to the current page. At the moment it sends them an ...
Robin I Knight's user avatar
16 votes
3 answers
8k views

Remove update nags for non-admins [duplicate]

I'm trying to remove or hide the update nags for non-admin users. As an admin, I see: The popular answer I've seen to handle this says to use: function hide_update_nag() { if ( !current_user_can(...
j08691's user avatar
  • 765
16 votes
1 answer
12k views

Contact form redirecting to page not found on send

I have a contact form that I used lot's of times before on other non WP sites but it doesn't seem to work on my current WP site, it just redirects you to a page not found. I don't want to use any ...
Rob's user avatar
  • 1,406
15 votes
5 answers
61k views

Setting custom cookies in Wordpress

I am trying to set cookies to re-route returning users to my a specific page within my Wordpress site. I'd like some advice with these 2 things: Where in the Wordpress php files should cookies be ...
Atticus's user avatar
  • 381
15 votes
4 answers
16k views

WP-CLI - Selecting PHP version

On a development server I have a co-install of PHP 5.6 & 7; nginx is configured with PHP 5.6. When I type "wp" it returns several errors and at the end of the error is a message containing the ...
j03's user avatar
  • 177
15 votes
9 answers
9k views

Adding first / last CSS classes to menus

is that possible, without javascript hacks? like this: <ul class="my_menu"> <li class="first"> ... </li> <li> ... </li> <li> ... </li> <li class"...
Alex's user avatar
  • 1,081
15 votes
5 answers
5k views

How to fix the admin menu margin-top bug in WordPress 5.5?

I recently updated a WordPress instance from 5.4 to 5.5 to end up with an annoying margin-top in the admin area, above the menu directly. I deactivated all plugins, switched themes, did some ...
Braza's user avatar
  • 251
15 votes
1 answer
639 views

Are WordPress Heartbeat API 'beats' staggered or do they occur simultaneously for all users?

The WordPress Heartbeat API uses admin-ajax.php to run AJAX calls. If User X leaves their browser open, many calls will be made to the server, with each call happening when there is a 'beat'. Now if ...
henrywright's user avatar
  • 3,067
14 votes
4 answers
52k views

Get page content using slug

I'm trying to get page content when I only know the slug string. Is there a function for this, or an easy way to do this or is this a case of doing it via SQL? Thanks very much
Alex's user avatar
  • 471
14 votes
2 answers
9k views

add_action in namespace not working

I decided to namespace my plugin, and I got it all to work, except in my main plugin file. I added two actions in that plugin, before calling the init method of the plugin. <?php namespace ...
dingo_d's user avatar
  • 1,950

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