利用base64加解密
base64_encode是加密,而base64_decode是解密
语法:string base64_encode(string data); 语法:string base64_decode(string data);
加密案例如下：
public function encode_file_contents($filename) {
$type=strtolower(substr(strrchr($filename,\'.\'),1));
if (\'php\' == $type && is_file($filename) && is_writable($filename)) { // 如果是PHP文件 并且可写 则进行压缩编码
$contents = file_get_contents($filename); // 判断文件是否已经被编码处 理
$contents = php_strip_whitespace($filename);
// 去除PHP头部和尾部标识
$headerPos = strpos($contents,\'<?php\');
// echo $headerPos.\'<br>\';
//echo $footerPos;//,$footerPos-$headerPos
$contents = substr($contents,$headerPos+5);
$encode = base64_encode(gzdeflate($contents)); // 开始编码
$encode = \'<?php\'."\n eval(gzinflate(base64_decode("."\'".$encode."\'".")));\n\n?>";
return file_put_contents($filename, $encode);
}
return false;
}
public function index(){
$filename = \'根目录下绝对路径.php\';
$a=$this->encode_file_contents($filename);
if($a){
echo "OK,加密完成！";
}else{
echo "No,加密失败！";
}
}