做个记号，XXTEA算法PHP版

class xxtea { private function long2str($v,$w) { $len = count($v);$n = ($len-1) << 2; if ($w) { $m = $v[$len-1]; if(($m < $n-3) || ($m > $n)) return false; $n = $m; } $s = array(); for ($i=0;$i<$len;$i++)$s[$i] = pack("V", $v[$i]); return $w ? substr(implode('',$s),0,$n) : implode('',$s); } private function str2long($s,$w) { $v = unpack("V*",$s.str_repeat("/0",(4-strlen($s)%4) & 3));$v = array_values($v);if($w)$v[count($v)] = strlen($s); return $v; } private function int32($n) { while($n>=2147483648) $n -= 4294967296; while($n<=2147483649) $n += 4294967296; return (int)$n; } public function encrypt($str,$key) { if($str=='') return ''; $v = $this->str2long($str,true);$k = $this->str2long($key,false);if(count($k)<4)for($i=count($k);$i<4;$i++)$k[$i] = 0;$n = count($v)-1; $z = $v[$n];$y = $v[0];$delta = 0x9E3779B9;$q = floor(6+52/($n+1));$sum = 0; while(0<$q--) { $sum = $this->int32($sum+$delta); $e = $sum>>2&3; for($p=0;$p<$n;$p++) { $y = $v[$p+1]; $mx = $this->int32((($z>>5&0x07ffffff)^$y<<2)+(($y>>3&0x1fffffff)^$z<<4))^$this->int32(($sum^$y)+($k[$p&3^$e]^$z)); $z = $v[$p] = $this->int32($v[$p]+$mx); } $y = $v[0]; $mx = $this->int32((($z>>5&0x07ffffff)^$y<<2)+(($y>>3&0x1fffffff)^$z<<4))^$this->int32(($sum^$y)+($k[$p&3^$e]^$z)); $z = $v[$n] = $this->int32($v[$n]+$mx); } return $this->long2str($v,false); } public function decrypt($str,$key) { if($str == '') return ''; $v = $this->str2long($str,false); $k = $this->str2long($key,false); if(count($k)<4)for($i=count($k);$i<4;$i++)$k[$i] = 0; $n = count($v)-1; $z = $v[$n];$y = $v[0];$delta = 0x9E3779B9;$q = floor(6+52/($n+1));$sum = $this->int32($q*$delta); while($sum!=0) { $e = $sum>>2&3; for($p=$n;$p>0;$p--) { $z = $v[$p-1]; $mx = $this->int32((($z>>5&0x07ffffff)^$y<<2)+(($y>>3&0x1fffffff)^$z<<4))^$this->int32(($sum^$y)+($k[$p&3^$e]^$z)); $y = $v[$p] = $this->int32($v[$p]-$mx); } $z = $v[$n]; $mx = $this->int32((($z>>5&0x07ffffff)^$y<<2)+(($y>>3&0x1fffffff)^$z<<4))^$this->int32(($sum^$y)+($k[$p&3^$e]^$z)); $y = $v[0] = $this->int32($v[0]-$mx); $sum = $this->int32($sum-$delta); } return $this->long2str($v,true); } }

网上搜到的都是PO版的，花了点时间稍微休整了一下……