An array is a systematic arrangement of objects, usually in rows and columns
A computer file is a block of arbitrary information, or resource for storing information, which is available to a computer program and is usually based on some kind of durable storage
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Numeric array has numbers(+integers) that represent the values Associative array has strings that represent the values
13...13x1.
To empty an array in PHP you need to use the unset function like shown below: <?php $array = array('hello', 'hi', 'weee'); unset($array); // empty ?>
Yes, a unit array.
It is an array with the same number of rows and columns.