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<?php $num = 999999999; $return = ''; $result_62 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $result_62_arr = str_split($result_62); while($num != 0) { // $return = $result_62_arr[bcmod($num,62)].$return; // $num = bcdiv($num,62,0); $return = $result_62_arr[(intval($num)%62)].$return; $num = $num/62; } echo $return;

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