Title: Undefined property: stdClass…class-wp-list-util.php
Last modified: November 2, 2021

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# Undefined property: stdClass…class-wp-list-util.php

 *  [irisla](https://wordpress.org/support/users/irisla/)
 * (@irisla)
 * [4 years, 6 months ago](https://wordpress.org/support/topic/undefined-property-stdclass-class-wp-list-util-php/)
 * Hi!
    Can somebody assist me with this error that is coming up on my site?
 * Warning: Undefined property: stdClass::$plugin in /home/bqgfvegddx3b/public_html/
   bananasgame.co.uk/wp-includes/class-wp-list-util.php on line 166
 * THis is what line 166 is saying: “$newlist[ $key ] = $value->$field;”
 * and the line 166 in context:
 *     ```
       /**
       	 * Plucks a certain field out of each object in the list.
       	 *
       	 * This has the same functionality and prototype of
       	 * array_column() (PHP 5.5) but also supports objects.
       	 *
       	 * @since 4.7.0
       	 *
       	 * @param int|string $field     Field from the object to place instead of the entire object
       	 * @param int|string $index_key Optional. Field from the object to use as keys for the new array.
       	 *                              Default null.
       	 * @return array Array of found values. If <code>$index_key</code> is set, an array of found values with keys
       	 *               corresponding to <code>$index_key</code>. If <code>$index_key</code> is null, array keys from the original
       	 *               <code>$list</code> will be preserved in the results.
       	 */
       	public function pluck( $field, $index_key = null ) {
       		$newlist = array();
   
       		if ( ! $index_key ) {
       			/*
       			 * This is simple. Could at some point wrap array_column()
       			 * if we knew we had an array of arrays.
       			 */
       			foreach ( $this->output as $key => $value ) {
       				if ( is_object( $value ) ) {
       					$newlist[ $key ] = $value->$field;
       				} else {
       					$newlist[ $key ] = $value[ $field ];
       				}
       			}
       ```
   
 * Thank you very much!

Viewing 1 replies (of 1 total)

 *  Moderator [Steven Stern (sterndata)](https://wordpress.org/support/users/sterndata/)
 * (@sterndata)
 * Volunteer Forum Moderator
 * [4 years, 6 months ago](https://wordpress.org/support/topic/undefined-property-stdclass-class-wp-list-util-php/#post-15030279)
 * Moderator note: You’ve posted in the support area for an abandoned plugin, “Technical
   Support”. This is not the right place for your question.
 * Post at [https://wordpress.org/support/forum/how-to-and-troubleshooting/#new-post&lt](https://wordpress.org/support/forum/how-to-and-troubleshooting/#new-post&lt);

Viewing 1 replies (of 1 total)

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## Tags

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 * 1 reply
 * 1 participant
 * Last reply from: [Steven Stern (sterndata)](https://wordpress.org/support/users/sterndata/)
 * Last activity: [4 years, 6 months ago](https://wordpress.org/support/topic/undefined-property-stdclass-class-wp-list-util-php/#post-15030279)
 * Status: not resolved