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Php custom encryption solution implementation code. The Mcrypt encryption library in PHP requires additional settings. many people directly use the md5 () function for encryption. this method is indeed safe, but because md5 is irreversible encryption, the password cannot be restored, therefore, there is also a PHP Mcrypt encryption library that requires additional settings. many people directly use the md5 () function for encryption. this method is indeed safe, but because md5 is irreversible en

A piece of php encryption and decryption code $ Key = "This is supposed to be a secret key !!! "; Function keyED ($ txt, $ encrypt_key) { $ Encrypt_key = md5 ($ encrypt_key ); $ Ctr = 0; $ Tmp = ""; For ($ I = 0; $ I { If ($ ctr = strlen ($ encrypt_key) $ ctr = 0; $ Tmp. = substr ($ txt, $ I, 1) ^ substr ($ encrypt_key, $

A piece of php encryption and decryption code $ Key = "This is supposed to be a secret key !!! "; Function keyED ($ txt, $ encrypt_key) { $ Encrypt_key = md5 ($ encrypt_key ); $ Ctr = 0; $ Tmp = ""; For ($ I = 0; $ I { If ($ ctr = strlen ($ encrypt_key) $ ctr = 0; $ Tmp. = substr ($ txt, $ I, 1) ^ substr ($ encrypt_key, $

Powerful PHP encryption and decryption Http://blog.ddian.cn /? Posting = 923 Class Ender { Private $ enkey; // key used for encryption and decryption // The construction parameter is the key Public function _ construct ($ key = ''){ If (! $ Key ){ $ This-> enkey = $ key; } } // Set the key Public function set_key ($ key ){ $ This-> enkey = $ key; } Private function keyED ($ txt, $ encrypt_key) { $ Enc

PHP encryption and decryption is often the case, recently in the related things, found Discuz forum PHP encryption and decryption processing class code, feel very good, in use, to refer to the Discuz forum passport-related functions, I will attach the use of the method, the first class code post: 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748 /*=========================================================文件名称：cls.sys_crypt.php=摘要：php加密解密处理类=版

PHP Mcrypt Encryption Library needs additional settings, many people are directly using the MD5 () function encryption, this method is indeed safe, but because MD5 is irreversible encryption, unable to restore the password, so there are some inconveniences, this article describes the encryption function supports the private key, used up or good The code is as follows Copy Code Description: PHP write encryption function, support private key function KeyED ($txt,

This article to share this PHP encryption class is a can support the Chinese and English can be encrypted to decrypt the PHP implementation class file, the need for students can refer to, but it is best to set the document encoding Utf-8 OH. Save the following code as a MD5Crypt.class.php file The code is as follows Copy Code Class Md5crypt {/*** Enter description here ...* @param unknown_type $str* @return String*/Public final static function Mdsha ($STR) {$code =

It was because of the use of Base64 that there was a problem when sending this token through the Get method. For example: http://test/test.php?a=1+2 You use $_get["a"] to obtain is: 1 2, that is, the plus sign is gone. At first I used UrlEncode to convert it, but there were always one or two of the results that were unexpected. Later think of the Base64 character is limited to: [a-za-z0-9\+\/=] So many, plus the problem, I will replace the plus sign with no problem, underline is the best choice

Copy CodeThe code is as follows: /** * Function: Encrypt string processing * Parameter one: Content that needs to be encrypted * Parameter two: key */ function Passport_encrypt ($STR, $key) {//encryption function Srand (Double) microtime () * 1000000); $encrypt _key=md5 (rand (0, 32000)); $ctr = 0; $tmp = "; for ($i =0; $i $ctr = $ctr ==strlen ($encrypt _key)?

/** * Function: Encrypt string processing * Parameter one: Content that needs to be encrypted * Parameter two: key */ function Passport_encrypt ($STR, $key) {//encryption function Srand (Double) microtime () * 1000000); $encrypt _key=md5 (rand (0, 32000)); $ctr = 0; $tmp = "; for ($i =0; $i $ctr = $ctr ==strlen ($encrypt _key)? 0: $