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base62_encode|base64_decode的P
完全參照J(rèn)ava 改寫了一版本PHP，希望能提供方便。
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5) {
char c = encodes[val >> (pos -= 6)];
sb.append(
c == 'i' ? "ia" : (c == '+' ? "ib" :( c == '/' ? "ic" : c)));
val &= ((1 << pos) - 1);
}
}
if (pos > 0) {
char c = encodes[val << (6 - pos)];
sb.append(
c == 'i' ? "ia" : (c == '+' ? "ib" :( c == '/' ? "ic" : c)));
}
return sb;
}
*/
public static function base62_encode($data)
{
$sb = '';
$len = strlen($data);
$pos = $val = 0;
for($i= 0; $i < $len; $i++){
$tv = substr($data, $i, 1);
$val = ($val << 8) | (ord($tv) & 0xFF);
$pos += 8;
while($pos > 5){
$c = substr(self::$encodes, $val >> ($pos -= 6), 1);
$sb .= $c == 'i' ? "ia" : (($c == '+') ? "ib" : (($c == '/') ? 'ic' : $c));
$val &= ((1<<$pos) -1);
}
}
if($pos > 0){
$c = substr(self::$encodes, $val << (6 - $pos), 1);
$sb .= ($c == 'i') ? "ia" : (($c == '+') ? "ib" : (($c == '/') ? 'ic' : $c));
}
return $sb;
}
/*
public static byte[] decodeBase62(char[] data) {
ByteArrayOutputStream baos = new ByteArrayOutputStream(data.length);
int pos = 0, val = 0;
for (int i = 0; i < data.length; i++) {
char c = data[i];
if (c == 'i') {
c = data[++i];
c = c == 'a' ? 'i' : (c == 'b' ? '+' : (c == 'c' ? '/' : data[--i]));
}
val = (val << 6) | decodes[c];
pos += 6;
while (pos > 7) {
baos.write(val >> (pos -= 8));
val &= ((1 << pos) - 1);
}
}
return baos.toByteArray();
}
*/
public static function base62_decode($data)
{
$baos = '';
$pos = $val = 0;
$len = strlen($data);
for($i = 0; $i < $len; $i++){
$c = substr($data, $i, 1);
if($c == 'i'){
$c = substr($data, ++$i, 1);
$c = ($c == 'a') ? 'i' : ($c == 'b' ? '+' : ($c == 'c' ? '/' : substr($data, --$i, 1)));
}
$val = ($val << 6) | strpos(self::$encodes, $c);
$pos += 6;
while($pos > 7){
$tv = ($val >> ($pos -= 8));
//var_dump($tv);
$baos .= chr($tv);
$val &= ((1 << $pos) - 1);
}
}
return $baos;
}
}
foreach([1,2,3,'a','b', 'c', 'addddd', '111', 'fkdskfjdsljflsdjfljsaldkjflaskjfldskjlfkjdslkfjladskjfldsk'] as $v){
var_dump($v);
$b = Base62::base62_encode($v);
var_dump($b);
var_dump(base64_encode($v));
var_dump(Base62::base62_decode($b));
echo "----------------------\n";
}
網(wǎng)站標(biāo)題：base62_encode|base64_decode的P
文章來源：http://fisionsoft.com.cn/article/jsjgdh.html
