PHP Warning: Attempt to read property "post_content" on null

[Aruna KN]

I’m using a wordpress theme which has not received updates for 2 years, and they’re not giving any support for that theme but I love this theme. After upgrading my server’s PHP version from 7.4 to 8.1 I’m getting an error_log.

PHP Warning: Attempt to read property "post_content" on null in /some-path/wp-content/themes/boldr-lite/functions.php on line 267

PHP Warning: Attempt to read property "post_content" on null in /some-path/wp-content/themes/boldr-lite/functions.php on line 268

I checked the functions.php and line number 267 and 268 as given below:

preg_match( '//', $post->post_content )

|| preg_match( '//', $post->post_content )

And the full function including the above two lines as given below:

/*
* Rewrite and replace wp_trim_excerpt() so it adds a relevant read more link
* when the or quicktags are used
* This new function preserves every features and filters from the original wp_trim_excerpt
*/
function boldr_trim_excerpt( $text = '' ) {
global $post;
$raw_excerpt = $text;
if ( '' === $text ) {
$text = get_the_content( '' );
$text = strip_shortcodes( $text );
$text = apply_filters( 'the_content', $text );
$text = str_replace( ']]>', ']]>', $text );
$excerpt_length = apply_filters( 'excerpt_length', 55 );
$excerpt_more = apply_filters( 'excerpt_more', ' [...]' );
$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );

	/\* If the post\_content contains a  OR a  quicktag
	 \* AND the more link has not been added already
	 \* then we add it now
	 \*/
	if (
		(
			preg\_match( '//', $post->post\_content )
			|| preg\_match( '//', $post->post\_content )
		)
		&& strpos( $text, $excerpt\_more ) === false
	) :
		$text .= $excerpt\_more;
	endif;

}
return apply\_filters( 'boldr\_trim\_excerpt', $text, $raw\_excerpt );

}
remove_filter( 'get_the_excerpt', 'wp_trim_excerpt' );
add_filter( 'get_the_excerpt', 'boldr_trim_excerpt' );

Please suggest a solution to fix the issue

[Lost User]

As with all such questions, the problem is that $post has not been initialised. Whenever a system complains about some action being attempted on null, or a NullPointerException is thrown, you need to look at the object that the message refers back to.