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 ): int
Callback to sort an array by specific fields.
Description
See also
Parameters
-
$aobject|array Required -
One object to compare.
-
$bobject|array Required -
The other object to compare.
Return
int 0 if both objects equal. -1 if second object should come first, 1 otherwise.
Source
File: wp-includes/class-wp-list-util.php.
View all references
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;
}
Changelog
| Version | Description |
|---|---|
| 4.7.0 | Introduced. |