PHP Error

  • Resolved rockstaremperor

    (@rockstaremperor)


    2 years, 4 months ago

    Hi,
    My WordPress site is on PHP 8.1. I am using the following scripts via a code snippet

    function blogger_query_vars_filter( $vars ) {
  $vars[] = "blogger";
  return $vars;
}
 
add_filter('query_vars', 'blogger_query_vars_filter');
 
function blogger_template_redirect() {
  global $wp_query;
  $blogger = $wp_query->query_vars['blogger'];
  if ( isset ( $blogger ) ) {
    wp_redirect( get_wordpress_url ( $blogger ) , 301 );
    exit;
  }
}
 
add_action( 'template_redirect', 'blogger_template_redirect' );
 
function get_wordpress_url($blogger) {
  if ( preg_match('@^(?:https?://)?([^/]+)(.*)@i', $blogger, $url_parts) ) {
    $query = new WP_Query ( 
      array ( "meta_key" => "blogger_permalink", "meta_value" => $url_parts[2] ) );
    if ($query->have_posts()) { 
      $query->the_post();
      $url = get_permalink(); 
    } 
    wp_reset_postdata(); 
  } 
  return $url ? $url : home_url();
}

    Though the code is working fine, I am getting PHP errors as below

    PHP Warning:  Undefined array key "blogger" in /home/lsudlknf/public_html/wp-content/plugins/code-snippets/php/snippet-ops.php(505) : eval()'d code on line 10

    Please help.

Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Author Shea Bunge

    (@bungeshea)

    You need to check whether the blogger key exists before attempting to access it:

    add_filter( 'query_vars', function ( $vars ) {
	$vars[] = 'blogger';
	return $vars;
} );

add_action( 'template_redirect', function () {
	global $wp_query;
	if ( array_key_exists( 'blogger', $wp_query->query_vars ) ) {
		wp_redirect( get_wordpress_url( $wp_query->query_vars['blogger'] ), 301 );
		exit;
	}
} );

function get_wordpress_url( $blogger ) {
	$url = '';

	if ( preg_match( '@^(?:https?://)?([^/]+)(.*)@i', $blogger, $url_parts ) ) {
		$query = new WP_Query ( array( 'meta_key' => 'blogger_permalink', 'meta_value' => $url_parts[2] ) );
		if ( $query->have_posts() ) {
			$query->the_post();
			$url = get_permalink();
		}
		wp_reset_postdata();
	}
	return $url ? $url : home_url();
}
    Thread Starter rockstaremperor

    (@rockstaremperor)

    I did not understand. Where do I check?
    Above is a Redirection code from Blogger to WordPress and the redirection is working fine without problem. Error is reported in Error Log only.

    Plugin Author Shea Bunge

    (@bungeshea)

    Did you try using the updated code I posted? Your snippet code contained a bug that was producing that error message.

Viewing 3 replies - 1 through 3 (of 3 total)
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