lib/adapter/Xxtea.php
public function encrypt($str, $key) 
	{
		if ($str == '') {
			return '';
		}
		
		if (!$key || !is_string($key)) {
		    throw new \wf\crypt\Exception('[wf\\crypt\\Xxtea::encrypt] param 2 ($key) is required.');
		}
		
		$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 encrypt($str, $key) 
	{
		if ($str == '') {
			return '';
		}
		
		if (!$key || !is_string($key)) {
		    throw new \wf\crypt\Exception('[wf\\crypt\\Xxtea::encrypt] param 2 ($key) is required.');
		}
		
		$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);
	}
(non-PHPdoc)
@see \wf\crypt\CryptInterface::encrypt()