参数说明：
$key密钥，固定8个字符，不能多也不能少
代码语言：php复制<?php
//加密
function encryption($str,$key = 'gV0iX9aD') {
$iv = $key;
$data = openssl_encrypt($str,"DES-CBC",$key,OPENSSL_RAW_DATA,$iv);
$data = strtolower(bin2hex($data));
return $data;
}
//解密
function decryption($str,$key = 'gV0iX9aD') {
$iv = $key;
return openssl_decrypt (hex2bin($str), 'DES-CBC', $key, OPENSSL_RAW_DATA,$iv);
}
$data = "123456";
$encryption = encryption($data); //加密字符串123456
$decryption = decryption($encryption); //解密
echo $encryption; //输出加密结果（df6dc44aa296d763）
echo $decryption; //输出解密结果
