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Which is the most efficient way to determine if a key is present in an array, assuming the array has no NULL v seenagapeDecember 14, 2016 Which is the most efficient way to determine if a key is present in an array, assuming the array hasno NULL values? A.in_array(‘key’, array_keys($a)) B.isset($a[‘key’]) C.array_key_exists(‘key’, $a) D.None of the above Show Answer
Why not B.?
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‘B” correct
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C
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Isset will not work, because it has null value.
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