variables - Read For Learn

PHP Warning: Attempt to read property “id” on null

$product->id only works if $product has a value, and sometimes it does not! E.g. on a login page which product would it be? So you need to check if it’s valid/exists/safe with an if check: global $product; if ( ! empty( $product ) ) { // code that uses $product goes here }

How to make my scroll bar show under condition

It seems like the issue might be related to the scope of the $flag variable. Currently, you are setting $flag=true inside the if(isset($_POST[‘bnews’])) block, which means it’s a local variable within that block. To make it accessible outside that block, you should declare it outside the if statement. Additionally, you are trying to use $flag … Read more

How to set and retrieve cookies while in the loop

Creating a Variable Product

How can one use variables in a template or template part without polluting the global scope?

I feel there is a bit of confusion — let me try and clarify some key concepts. A WordPress installation can potentially run huge amounts of 3rd party code. Code you can’t control. That leads to a high chance of naming collisions. That’s why WordPress coding standards suggest to “namespace” functions and variables declared in … Read more

Dynamic header and footer template inclusion: footer script not included

This is because the code uses require_once which only loads and runs the file once. require would fix the problem, but it would actually be better to use get_template_part() instead. This would allow you to use template filters, block templates, and child themes. get_template_part( string $slug, string $name = null, array $args = array() ): … Read more

Passing value from one hook to another

The solution for this was a compromise I moved the code from the wp_login hook into my meta_links function and test to see if my value exists function dk_plugin_meta_links( $links, $file ) { if($latestversion == “”) { //get the latest version if we don’t already have it } (do something with) $latestversion; } add_filter( ‘plugin_row_meta’, … Read more