Online PHP editor | output for IO6uF

<?php class base62{ /** * 10进制转为62进制 * @param integer $n 10进制数值 * @return string 62进制 */ function base10to62($n) { $base = 62; $index = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $ret = ''; for($t = floor(log10($n) / log10($base)); $t >= 0; $t --) { $a = floor($n / pow($base, $t)); $ret .= substr($index, $a, 1); $n -= $a * pow($base, $t); } return $ret; } /** * 62进制转为10进制 * @param integer $n 62进制 * @return string 10进制 */ function base62to10($s) { $base = 62; $index = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $ret = 0; $len = strlen($s) - 1; for($t = 0; $t <= $len; $t ++) { $ret += strpos($index, substr($s, $t, 1)) * pow($base, $len - $t); } return $ret; } } $base = new base62; echo $base->base10to62("3819313952083157");