PHP error / eval()’d code

  • Resolved SilverSunrise

    (@silversunrise)


    7 months, 2 weeks ago

    Hi,

    since I changed to PHP 8.0 I get this error-message in the server logs:

    126359#0: *37455 FastCGI sent in stderr: “PHP message: PHP Warning: Attempt to read property “ID” on null in?…/wp-content/plugins/code-snippets/php/snippet-ops.php(582) : eval()’d code on line 5″ while reading response header from upstream

    I only have one snippet activated with the following code:

    add_action( 'template_redirect', 'redirect_to_primary_category' );
    function redirect_to_primary_category() {
    global $post;
    // If the post is single.
    if ( is_single( $post->ID ) ) {
    // If the post has multiple categories assigned.
    $cats = wp_get_post_categories( $post->ID );
    if ( count( $cats ) > 1 ) {
    // Get the primary category.
    $primary_category = get_post_meta( $post->ID, 'rank_math_primary_category', true );
    // If the primary category isn't in the URL, redirect.
    global $wp;
    $primary_object = get_term( $primary_category );
    if ( 0 !== strpos( $wp->request, $primary_object->slug ) ) {
    $primary_url = home_url( '/' . $primary_object->slug . '/' . $post->post_name . '/' );
    wp_safe_redirect( $primary_url, 301 );
    exit;
    }
    }
    }
    }

    I cannot find any error in this snippet. Could you please take a look?

    Thank you so much

    Joachim

    • This topic was modified 7 months, 2 weeks ago by SilverSunrise.

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Viewing 1 replies (of 1 total)
  • Plugin Author Shea Bunge

    (@bungeshea)

    Hi Joachim,

    You can’t be assured that the global $post variable will be set on each instance that the function is called. You can just include it in your if statement to avoid this error:

    add_action( 'template_redirect', 'redirect_to_primary_category' );
function redirect_to_primary_category() {
	global $post;
	// If the post is single.
	if ( $post && is_single( $post->ID ) ) {
		// If the post has multiple categories assigned.
		$cats = wp_get_post_categories( $post->ID );
		if ( count( $cats ) > 1 ) {
			// Get the primary category.
			$primary_category = get_post_meta( $post->ID, 'rank_math_primary_category', true );
			// If the primary category isn't in the URL, redirect.
			global $wp;
			$primary_object = get_term( $primary_category );
			if ( 0 !== strpos( $wp->request, $primary_object->slug ) ) {
				$primary_url = home_url( '/' . $primary_object->slug . '/' . $post->post_name . '/' );
				wp_safe_redirect( $primary_url, 301 );
				exit;
			}
		}
	}
}
Viewing 1 replies (of 1 total)
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