<?php/* * Created on 2018-9-1 * * To change the template for this generated file go to * Window - Preferences - PHPeclipse - PHP - Code Templates */ /** 用法： Security::encrypt($str,$key); Security::decrypt($str,$key); */ class Security {  public static function encrypt($input, $key) {   $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);   $input = Security::pkcs5_pad($input, $size);   $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');   $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);   mcrypt_generic_init($td, $key, $iv);   $data = mcrypt_generic($td, $input);   mcrypt_generic_deinit($td);   mcrypt_module_close($td);   $data = base64_encode($data);   return $data;  }  private static function pkcs5_pad ($text, $blocksize) {   $pad = $blocksize - (strlen($text) % $blocksize);   return $text . str_repeat(chr($pad), $pad);  }  public static function decrypt($sStr, $sKey) {   $decrypted= mcrypt_decrypt(    MCRYPT_RIJNDAEL_128,    $sKey,    base64_decode($sStr),    MCRYPT_MODE_ECB   );   $dec_s = strlen($decrypted);   $padding = ord($decrypted[$dec_s-1]);   $decrypted = substr($decrypted, 0, -$padding);   return $decrypted;  } }//用法示例：$str = "www.49028c.com";$key = "123456";echo "原始字符串：".$str."<br/>";$pwdstr = Security::encrypt($str,$key);echo "加密后：".$pwdstr."<br/>";$destr = Security::decrypt($pwdstr,$key);echo "解密結果：".$destr;?>