Random unique alphanumeric string

HI gays ,

Here is a function to generate random unique alphanumeric string using PHP,

I am sure it will help some one to solve their problem

  function get_rand_txn_id($length = 10) {

        $randstring = '';
        $string_array = array_merge(range(0, 9), range('a', 'z'), range('A', 'Zå'));

        for ($i = 0; $i < $length; $i++) {
            $randstring .= $string_array[array_rand($string_array)];

        return $randstring;






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