PHP: Post 70 Variables --> Array --> MySQL -

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i have php page around 70 fields gets posted.
31 have following patern: hours_1, hours_2, hours_3 etc..
31 have following patern: description_1, description_2, description_3 etc..
there few other variables/fields clientid, month, year
can see, yes looks timesheet. gets posted , therefore hours in 1 array , descriptions in , after insert in table.

how these hour , description fields neatly array (or 2 arrays) can, after validation, use them insert them mysql table?

in php or html, can use [] convention name or receive variables arrays on server side i.e.

instead of generating variables _number seem doing, can:

<?php foreach(range(0, 30) $i): ?>     <input name="hours[]"> <?php endforeach; ?>

this allow neatly receive array on server side can

$_post['hours'];//will give array of hour inputs if submit post

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