Home > Article > Backend Development > Detailed explanation of PHP encryption and decryption functions, detailed explanation of encryption and decryption functions_PHP tutorial
Sharing a PHP encryption and decryption function, this function implements the function of encrypting some variable values.
The encryption code is as follows:
/* *功能:对字符串进行加密处理 *参数一:需要加密的内容 *参数二:密钥 */ function passport_encrypt($str,$key){ //加密函数 srand((double)microtime() * 1000000); $encrypt_key=md5(rand(0, 32000)); $ctr=0; $tmp=''; for($i=0;$i<strlen($str);$i++){ $ctr=$ctr==strlen($encrypt_key)?0:$ctr; $tmp.=$encrypt_key[$ctr].($str[$i] ^ $encrypt_key[$ctr++]); } return base64_encode(passport_key($tmp,$key)); }
The decryption code is as follows:
/* *功能:对字符串进行解密处理 *参数一:需要解密的密文 *参数二:密钥 */ function passport_decrypt($str,$key){ //解密函数 $str=passport_key(base64_decode($str),$key); $tmp=''; for($i=0;$i<strlen($str);$i++){ $md5=$str[$i]; $tmp.=$str[++$i] ^ $md5; } return $tmp; }
Auxiliary function:
/* *辅助函数 */ function passport_key($str,$encrypt_key){ $encrypt_key=md5($encrypt_key); $ctr=0; $tmp=''; for($i=0;$i<strlen($str);$i++){ $ctr=$ctr==strlen($encrypt_key)?0:$ctr; $tmp.=$str[$i] ^ $encrypt_key[$ctr++]; } return $tmp; }
is used as follows:
$str='作者:余浩苗;电话:13611972365;电子邮件:123cvbz@163.com'; $key='hacker'; $encrypt=passport_encrypt($str,$key); $decrypt=passport_decrypt($encrypt,$key); echo '原文:',$str."<br><hr>"; echo '密文:',$encrypt."<br><hr>"; echo '译文:',$decrypt."<br><hr>";
The above is the PHP encryption and decryption function shared with you. I hope you like it and can apply it to your own learning.