<?php
$str = '123456';
$key = "Njqm8hxfGMWCPRo2VndmHCoP";
$cipher = MCRYPT_TRIPLEDES;
$mode = MCRYPT_MODE_CBC;
$data=utf8_encode($str);
$iv = mcrypt_create_iv(mcrypt_get_iv_size($cipher,$mode),MCRYPT_RAND);
//$iv="5P5CoL4r";
echo "原文:".utf8_encode($str)."<br>";
$str_encrypt = mcrypt_encrypt($cipher,$key,$data,$mode,$iv);
echo "加密后的内容是:".base64_encode($str_encrypt)."<br>";
$str_decrypt = mcrypt_decrypt($cipher,$key,$str_encrypt,$mode,$iv);
echo "解密后的内容:".$str_decrypt."<br>";
?>