Add custom meta tags to HTML head via functions.php

There are a few cases where you need to add your own Meta Tags in your header. For example to verify that you are the website owner.

Meta tags look like this:

<meta name="key" content="value" />
<meta name="keywords" content="keyword1, keyword2" />
<meta name="description" content="this is the description of this page" />
<meta name="facebook-domain-verification" content="abcdefghijklmnopqrstuvwxyz" />

There are WordPress plugins available to achieve the same. But it can be done without a plugin if you follow these simple steps below:

1. Navigate to wp-content > themes folder and select your child theme

2. Open functions.php

3. Add the following PHP code with your meta tags and save the file

/**
* 
* Add custom Meta Tag to header. 
*/
function custom_header_metadata() {
  ?>
	<meta name="abc" content="xyz" />
  <?php
 
}
add_action( 'wp_head', 'custom_header_metadata' );

Thats it!