plugin-development - Read For Learn

settings_fields() doesn’t work for other roles except admin

To change the capability required to save settings you can use the option_page_capability_{$option_page} filter, where {$option_page} is the value passed to settings_field() on your settings page. So if you have this on your settings page: <?php settings_fields( ‘wpse_294802_options’ ); ?> You can change the required capability to save with the option_page_capability_wpse_294802_options filter: function wpse_294802_option_page_capability() { … Read more

Use wp_set_post_terms() instead of wp_insert_post()

After some hours of further searching i found the solution: wp_set_post_terms($pid, array(“2”), “project-type”);

Is it safe to call do_action and apply_filters for built-in hooks?

I think there is a difference here between do_action and apply_filters. do_action usually triggers a global state change, either output, enqueuing of resource, initialization of modules, and such. This, like anything which infuance global state can result in surprising side effect when used out of context. apply_filters OTOH behaves much more like a function call, … Read more

Add custom element ID depending where the widget place is, sidebar or footer

Solved it by following the advice from @mmm. Using $args[“id”] did the trick. Using $args[“id”] will return the following: post-sidebar footer-first With a little change, my final code is: public function widget( $args, $instance ) { extract($args); // … <div id=’instafeed-<?php echo explode(“-“, $args[“id”])[0] ;?>’ class=”c-widget-instagram”></div> <?php echo $after_widget; } The result is: <div id=’instafeed-post’ … Read more

How to check if Woocommerce Order number equals to post ID?

global $post; $order = wc_get_order($post->ID); if(!empty($order) && $post->ID == $order->get_id()){ //do things } This should work. The first check is because the order with the post ID does not have to exists just as you said.

Custom plugin – $post_id in wp_head

Use get_queried_object_id() to get the post ID of the current page/post when viewing a single page or post, regardless of whether or not you’re in the loop, or what the global $post variable happens to be at that moment: if ( is_page() || is_single() ) { $post_id = get_queried_object_id(); $meta_alternate = get_post_meta( $post_id, ‘extra_meta_alternate’, true … Read more

js/css updating when making a plugin

This isn’t really a WordPress issue. It’s just how browsers cache styles and scripts so that it doesn’t need to download them again. Renaming the file means the browsers treat them as new files and re-download them. That being said, WordPress does offer a way to get around this issue. But firstly, you should properly … Read more

How can I create a plugin that changes the title color of a website?

The exact way to do this may vary based on the theme you are using, but here’s a simple plugin that hooks into the wp_head action hook and adds some style to the header: <?php /** * @package PACKAGE_NAME */ /* Plugin Name: Plugin name Plugin URI: https://plugin-website Description: Plugin Description Version: 1.0.0 Author: Plugin … Read more

Access first name and last name from user_register

The Codex is always a good place to look for things. Check out this https://codex.wordpress.org/wp_get_current_user Where you will find this sample code: <?php $current_user = wp_get_current_user(); /** * @example Safe usage: * $current_user = wp_get_current_user(); * if ( ! $current_user->exists() ) { * return; * } */ echo ‘Username: ‘ . $current_user->user_login . ‘<br />’; … Read more

Cannot redeclare function error on the same line

Don’t define functions within functions. function run_plugin(), function my_plugin_name(), and custom_cart_min_qty(). This is not how you should write this code. Your add_action() and add_filter hooks already call these functions.

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