How to use AES encryption and decryption with PHP

AES encryption uses the mcrypt_decrypt function in the php5 version. This function has been deprecated after php7.1. It is replaced by openssl's openssl_encrypt and openssl_decrypt, and the code is also very streamlined. Here is the sample code:

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class Aes
{
public $key = '';
 
public $iv = '';
 
public function __construct($config)
{
foreach($config as $k => $v){
$this->$k = $v;
}
}
//加密
public function aesEn($data){
return  base64_encode(openssl_encrypt($data, $this->method,$this->key, OPENSSL_RAW_DATA , $this->iv));  
}
 
    //解密
public function aesDe($data){
return openssl_decrypt(base64_decode($data),  $this->method, $this->key, OPENSSL_RAW_DATA, $this->iv);
}
}
 
 $config = [
'key'=>'reter4446fdfgdfgdfg', //加密key 
'iv'=>  md5(time(). uniqid(),true), //保证偏移量为16位
'method'=> 'AES-128-CBC' //加密方式  # AES-256-CBC等
 ];
 
$obj = new Aes($config);
 
$res = $obj->aesEn('aaaddee44');//加密数据
 
echo $res;
echo &#39;<hr>&#39;;
 
echo $obj->aesDe($res);//解密

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