- array_reduce: documentation ( source)
- var_export: documentation ( source)
- array_fill: documentation ( source)
<?php
$array = [['xxx', 3], ['yyy', 2]];
var_export(
array_reduce(
$array,
fn($result, $row) => [...$result, ...array_fill(0, $row[1], [$row[0]])],
[]
)
);