[Support request] “PHP message: PHP Warning: Undefined variable $post

[Ravi Saive]

I am getting the following error in the nginx logs:

2022/06/01 06:10:45 [error] 215858#0: *462115 FastCGI sent in stderr: "PHP message: PHP Warning: Undefined variable $post in /data/httpd/htdocs/tecmint/wp-content/plugins/gp-premium/elements/class-hooks.php(215) : eval()'d code on line 1PHP message: PHP Warning: Attempt to read property "ID" on null in /data/httpd/htdocs/tecmint/wp-content/plugins/gp-premium/elements/class-hooks.php(215) : eval()'d code on line 1" while reading response header from upstream, client: 141.101.99.153, server: tecmint.com, request: "GET /install-lxqt-desktop-in-ubuntu-fedora/ HTTP/2.0", upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "www.tecmint.com", referrer: "https://www.tecmint.com/lightweight-linux-desktop-environments/"

It seems the following Hook giving an error in the logs:

If you have any questions or doubts? do <a style="text-decoration:underline;color:bb0e30;" href="<?php echo get_comments_link( $post->ID ); ?>">ask for help in the comments</a> section.

[Fernando]

Hi Ravi,

Can you try modifying the code to something like this?:

If you have any questions or doubts? do <a style="text-decoration:underline;color:bb0e30;" href="<?php 
	global $post;
	echo get_comments_link( $post->ID ); 
	?>">ask for help in the comments</a> section.

Kindly let us know how it goes.

[Ravi Saive]

Hi @Fernando,

The code worked fine, but I am getting another error as shown:

2022/06/02 05:59:55 [error] 219688#0: *1065872 FastCGI sent in stderr: "PHP message: PHP Warning: Undefined array key 0 in /data/httpd/htdocs/tecmint/wp-content/plugins/gp-premium/elements/class-hooks.php(215) : eval()'d code on line 6PHP message: PHP Warning: Attempt to read property "slug" on null in /data/httpd/htdocs/tecmint/wp-content/plugins/gp-premium/elements/class-hooks.php(215) : eval()'d code on line 11" while reading response header from upstream, client: 141.101.99.25, server: tecmint.com, request: "GET /how-to-hack-your-own-linux-system/5-2/ HTTP/2.0", upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "www.tecmint.com

It seems the error coming from the following php code:

<div class="wpsp-related-posts  grid-container">
	<h2>Related Posts</h2>
<?php
if ( is_single() ) {
    $cats =  get_the_category();
    $cat = $cats[0];
} else {
    $cat = get_category( get_query_var( 'cat' ) );
}

$cat_slug = $cat->slug;
$list = get_page_by_title( 'related', 'OBJECT', 'wp_show_posts' );
wpsp_display( $list->ID, 'tax_term="' . $cat_slug . '"' );
?>
</div>

[Fernando]

Where is this hook element displayed to?

Is it being displayed in a post with no category? Or are you setting this to display on non-post pages?

Kindly let us know.

[Ravi Saive]

I am displaying it on post pages which will show all related articles..

[Fernando]

To have a better understanding of the issue, may you kindly provide the link to the site in question?

You may use the private information field for this: https://docs.generatepress.com/article/using-the-premium-support-forum/#private-information

Hope to hear from you soon. 🙂

[Author]

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