wp-includes/rest-api.php:1755Checks if an array is made up of unique items.
$input_arrayarrayboolfunction rest_validate_array_contains_unique_items( $input_array ) { $seen = array(); foreach ( $input_array as $item ) { $stabilized = rest_stabilize_value( $item ); $key = serialize( $stabilized ); if ( ! isset( $seen[ $key ] ) ) { $seen[ $key ] = true; continue; } return false; } return true;}Introduced in 5.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.