php 加密解密種(含公開金鑰)

php 加密解密類(含公開金鑰)

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key; } srand((double)microtime()*1000000); $encrypt_key = md5(rand(0,32000)); $ctr=0; $tmp = ""; for ($i=0;$ikeyED($tmp,$key); } public function decrypt($txt,$key="") { if(empty($key)){ $key=$this->key; } $txt = $this->keyED($txt,$key); $tmp = ""; for ($i=0;$ikey=$key; } public function getKey() { return $this->key; } } $string = "http://www.52blogger.com"; $crypt= new Crypt(); $crypt->setKey("http://www.52blogger.com"); $enc_text = $crypt->encrypt($string,$crypt->getKey()); $dec_text = $crypt->decrypt($enc_text,$crypt->getKey()); echo "加密前 : $string 
\n"; echo "加密後 : $enc_text 
\n"; echo "解密後 : $dec_text \n"; ?> 

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