本文实例讲述了PHP加密解密方法。分享给大家供大家参考，具体如下：
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//加密
function string2secret($str)
{
$key = "123";
$td = mcrypt_module_open(MCRYPT_DES,'','ecb','');
$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td),MCRYPT_RAND);
$ks = mcrypt_enc_get_key_size($td);
$key = substr(md5($key),$ks);
mcrypt_generic_init($td,$key,$iv);
$secret = mcrypt_generic($td,$str);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $secret;
}
//解密
function secret2string($sec)
{
$key = "123";
$td = mcrypt_module_open(MCRYPT_DES,$iv);
$string = mdecrypt_generic($td,$sec);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return trim($string);
}
echo secret2string(string2secret("11111111111111111"));
//显示结果是11111111111111111
echo '
'.string2secret("11111111111111111"); //显示乱码 echo '
'; //$string:要加密的字符串 $isEncrypt=true:加密 $isEncrypt=false:解密 function dencrypt($string,$isEncrypt = true,$key = "KEY_SPACE") { if (!isset($string{0}) || !isset($key{0})) { return false; } $dynKey = $isEncrypt ? hash('sha1',microtime(true)) : substr($string,40); $fixedKey = hash('sha1',$key); $dynKeyPart1 = substr($dynKey,20); $dynKeyPart2 = substr($dynKey,20); $fixedKeyPart1 = substr($fixedKey,20); $fixedKeyPart2 = substr($fixedKey,20); $key = hash('sha1',$dynKeyPart1 . $fixedKeyPart1 . $dynKeyPart2 . $fixedKeyPart2); $string = $isEncrypt ? $fixedKeyPart1 . $string . $dynKeyPart2 : (isset($string{339}) ? gzuncompress(base64_decode(substr($string,40))) : base64_decode(substr($string,40))); $n = 0; $result = ''; $len = strlen($string); for ($n = 0; $n < $len; $n++) { $result .= chr(ord($string{$n}) ^ ord($key{$n % 40})); } return $isEncrypt ? $dynKey . str_replace('=',base64_encode($n > 299 ? gzcompress($result) : $result)) : substr($result,20,-20); } echo strlen(dencrypt("12345678912345"));
'.string2secret("11111111111111111"); //显示乱码 echo '
'; //$string:要加密的字符串 $isEncrypt=true:加密 $isEncrypt=false:解密 function dencrypt($string,$isEncrypt = true,$key = "KEY_SPACE") { if (!isset($string{0}) || !isset($key{0})) { return false; } $dynKey = $isEncrypt ? hash('sha1',microtime(true)) : substr($string,40); $fixedKey = hash('sha1',$key); $dynKeyPart1 = substr($dynKey,20); $dynKeyPart2 = substr($dynKey,20); $fixedKeyPart1 = substr($fixedKey,20); $fixedKeyPart2 = substr($fixedKey,20); $key = hash('sha1',$dynKeyPart1 . $fixedKeyPart1 . $dynKeyPart2 . $fixedKeyPart2); $string = $isEncrypt ? $fixedKeyPart1 . $string . $dynKeyPart2 : (isset($string{339}) ? gzuncompress(base64_decode(substr($string,40))) : base64_decode(substr($string,40))); $n = 0; $result = ''; $len = strlen($string); for ($n = 0; $n < $len; $n++) { $result .= chr(ord($string{$n}) ^ ord($key{$n % 40})); } return $isEncrypt ? $dynKey . str_replace('=',base64_encode($n > 299 ? gzcompress($result) : $result)) : substr($result,20,-20); } echo strlen(dencrypt("12345678912345"));
希望本文所述对大家PHP程序设计有所帮助。
原文链接：https://www.f2er.com/php/20676.html