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<?php $array = [['xxx', 3], ['yyy', 2]]; var_export( array_reduce( $array, fn($result, $row) => [...$result, ...array_fill(0, $row[1], [$row[0]])], [] ) );
Output for git.master_jit, git.master
array ( 0 => array ( 0 => 'xxx', ), 1 => array ( 0 => 'xxx', ), 2 => array ( 0 => 'xxx', ), 3 => array ( 0 => 'yyy', ), 4 => array ( 0 => 'yyy', ), )

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