Summary of examples of AES encryption and decryption in php

aesDemo.php:

examples,

<?php
require_once(&#39;./AES.php&#39;);
//$aes = new AES();
$aes = new AES(true);// 把加密后的字符串按十六进制进行存储
//$aes = new AES(true,true);// 带有调试信息且加密字符串按十六进制存储
$key = "this is a 32 byte key";// 密钥
$keys = $aes->makeKey($key);
$encode = "123456";// 被加密的字符串
$ct = $aes->encryptString($encode, $keys);
echo "encode = ".$ct."<br>";
$cpt = $aes->decryptString($ct, $keys);
echo "decode = ".$cpt;
?>

examples, AES encryption class

<?php
//php aes加密类
class AESMcrypt {
public $iv = null;
public $key = null;
public $bit = 128;
private $cipher;
public function __construct($bit, $key, $iv, $mode) {
if(empty($bit) || empty($key) || empty($iv) || empty($mode))
return NULL;
$this->bit = $bit;
$this->key = $key;
$this->iv = $iv;
$this->mode = $mode;
switch($this->bit) {
case 192:$this->cipher = MCRYPT_RIJNDAEL_192; break;
case 256:$this->cipher = MCRYPT_RIJNDAEL_256; break;
default: $this->cipher = MCRYPT_RIJNDAEL_128;
}
switch($this->mode) {
case &#39;ecb&#39;:$this->mode = MCRYPT_MODE_ECB; break;
case &#39;cfb&#39;:$this->mode = MCRYPT_MODE_CFB; break;
case &#39;ofb&#39;:$this->mode = MCRYPT_MODE_OFB; break;
case &#39;nofb&#39;:$this->mode = MCRYPT_MODE_NOFB; break;
default: $this->mode = MCRYPT_MODE_CBC;
}
}
public function encrypt($data) {
$data = base64_encode(mcrypt_encrypt( $this->cipher, $this->key, $data, $this->mode, $this->iv));
return $data;
}
public function decrypt($data) {
$data = mcrypt_decrypt( $this->cipher, $this->key, base64_decode($data), $this->mode, $this->iv);
$data = rtrim(rtrim($data), "..");
return $data;
}
}
//使用方法
$aes = new AESMcrypt($bit = 128, $key = &#39;abcdef1234567890&#39;, $iv = &#39;0987654321fedcba&#39;, $mode = &#39;cbc&#39;);
$c = $aes->encrypt(&#39;haowei.me&#39;);
var_dump($aes->decrypt($c));

examples, with an encryptable and decryptable class

<?PHP
/**
 * AES加密、解密类
 * @author hushangming
 * 
 * 用法：
 * <pre class="brush:php;toolbar:false">
 * // 实例化类
 * // 参数$_bit：格式，支持256、192、128，默认为128字节的
 * // 参数$_type：加密/解密方式，支持cfb、cbc、nofb、ofb、stream、ecb，默认为ecb
 * // 参数$_key：密钥，默认为abcdefghijuklmno
 * $tcaes = new TCAES(); 
 * $string = &#39;laohu&#39;;
 * // 加密
 * $encodeString = $tcaes->encode($string);
 * // 解密
 * $decodeString = $tcaes->decode($encodeString);
 * 

 */ class TCAES{  private $_bit = MCRYPT_RIJNDAEL_256;  private $_type = MCRYPT_MODE_CBC;  //private $_key = 'abcdefghijuklmno0123456789012345';  private $_key = 'abcdefghijuklmno'; // 密钥  private $_use_base64 = true;  private $_iv_size = null;  private $_iv = null;  /**   * @param string $_key 密钥   * @param int $_bit 默认使用128字节   * @param string $_type 加密解密方式   * @param boolean $_use_base64 默认使用base64二次加密   */  public function __construct($_key = '', $_bit = 128, $_type = 'ecb', $_use_base64 = true){   // 加密字节   if(192 === $_bit){    $this->_bit = MCRYPT_RIJNDAEL_192;   }elseif(128 === $_bit){    $this->_bit = MCRYPT_RIJNDAEL_128;   }else{    $this->_bit = MCRYPT_RIJNDAEL_256;   }   // 加密方法   if('cfb' === $_type){    $this->_type = MCRYPT_MODE_CFB;   }elseif('cbc' === $_type){    $this->_type = MCRYPT_MODE_CBC;   }elseif('nofb' === $_type){    $this->_type = MCRYPT_MODE_NOFB;   }elseif('ofb' === $_type){    $this->_type = MCRYPT_MODE_OFB;   }elseif('stream' === $_type){    $this->_type = MCRYPT_MODE_STREAM;   }else{    $this->_type = MCRYPT_MODE_ECB;   }   // 密钥   if(!empty($_key)){    $this->_key = $_key;   }   // 是否使用base64   $this->_use_base64 = $_use_base64;   $this->_iv_size = mcrypt_get_iv_size($this->_bit, $this->_type);   $this->_iv = mcrypt_create_iv($this->_iv_size, MCRYPT_RAND);  }  /**   * 加密   * @param string $string 待加密字符串   * @return string   */  public function encode($string){   if(MCRYPT_MODE_ECB === $this->_type){    $encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type);    }else{    $encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);   }   if($this->_use_base64)    $encodeString = base64_encode($encodeString);   return $encodeString;  }  /**   * 解密   * @param string $string 待解密字符串   * @return string   */  public function decode($string){   if($this->_use_base64)    $string = base64_decode($string);   $string = $this->toHexString($string);   if(MCRYPT_MODE_ECB === $this->_type){    $decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type);   }else{    $decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);   }   return $decodeString;  }  /**   * 将$string转换成十六进制   * @param string $string   * @return stream   */  private function toHexString ($string){   $buf = "";   for ($i = 0; $i 

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