Alert: This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness. Use WP_List_Util::sort() instead.

WP_List_Util::sort_callback( object|array $a, object|array $b )

Callback to sort the list by specific fields.


Description Description

See also See also


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Parameters Parameters

$a

(object|array) (Required) One object to compare.

$b

(object|array) (Required) The other object to compare.


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Return Return

(int) 0 if both objects equal. -1 if second object should come first, 1 otherwise.


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Source Source

File: wp-includes/class-wp-list-util.php

	private function sort_callback( $a, $b ) {
		if ( empty( $this->orderby ) ) {
			return 0;
		}

		$a = (array) $a;
		$b = (array) $b;

		foreach ( $this->orderby as $field => $direction ) {
			if ( ! isset( $a[ $field ] ) || ! isset( $b[ $field ] ) ) {
				continue;
			}

			if ( $a[ $field ] == $b[ $field ] ) {
				continue;
			}

			$results = 'DESC' === $direction ? array( 1, -1 ) : array( -1, 1 );

			if ( is_numeric( $a[ $field ] ) && is_numeric( $b[ $field ] ) ) {
				return ( $a[ $field ] < $b[ $field ] ) ? $results[0] : $results[1];
			}

			return 0 > strcmp( $a[ $field ], $b[ $field ] ) ? $results[0] : $results[1];
		}

		return 0;
	}

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Changelog Changelog

Changelog
Version Description
4.7.0 Introduced.

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