3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [['xxx', 3], ['yyy', 2]]; var_export( array_merge( ...array_map( fn($row) => array_fill(0, $row[1], [$row[0]]), $array ) ) );

preferences:
38.77 ms | 407 KiB | 5 Q