PHP: List all possible combinations of letters, 8 up to 64 byte long string
How to list all possible letter combinations, like:

    q
    w
    e
    r
    t
    y
    u
    o
    p
    s
    d
    f
    g
    h
    j
    k
    l
    x
    c
    v
    b
    n
    m
    qq
    qw
    qe
    qr
    qt
    qu

up to 64 byte long strings? So the last one would be String(8):

    mmmmmmmm
PHP: List all possible combinations of letters, 8 up to 64 byte long string
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How to list all possible letter combinations, like:

    q
    w
    e
    r
    t
    y
    u
    o
    p
    s
    d
    f
    g
    h
    j
    k
    l
    x
    c
    v
    b
    n
    m
    qq
    qw
    qe
    qr
    qt
    qu

up to 64 byte long strings? So the last one would be String(8):

    mmmmmmmm