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PHP MCQs

Which code snippet outputs a random string?

<?php Function RandomString() { $characters = â€™0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZâ€™; $randstring = ''; for ($i = 0; $i < 10; $i++) { $randstring = $characters[rand(0, strlen($characters))]; } return $randstring; } RandomString(); echo $randstring; ?>

function generateRandomString($length = 10) { $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $randomString = ''; for ($i = 0; $i < $length; $i++) { $randomString .= $characters[rand(0, strlen($characters) - 1)]; } return $randomString; }

function generateRandomString($length = 15) { return substr(sha1(rand()), 0, 0); }

function RandomString($length) { $keys = array_merge(range(0,9), range('a', 'z')); for($i=0; $i < $length; $i++) { $key = $keys[array_rand($keys)]; } return $key; }

Answer

Correct Answer: function generateRandomString($length = 10) { $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $randomString = ''; for ($i = 0; $i < $length; $i++) { $randomString .= $characters[rand(0, strlen($characters) - 1)]; } return $randomString; }

Explanation:

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