php aes加解密，mcrypt_encrypt 和openssl_encrypt

php7.1以下版本使用

　　/*
     * mcrypt_encrypt 加密
     * php7.1开始被丢弃 可以使用openssl_encrypt
     * */
    function aes_encrypt($content){
        $privateKey = "abcdef1234567890";
        $iv = "helloworld123456";
        $content = $this->pkcs7_pad($content); //支持openssl_decrypt 解密，
        $encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128,$privateKey,$content,MCRYPT_MODE_CBC,$iv);
        $based_encrypted = base64_encode($encrypted);
        return $based_encrypted;
    }

    /*
     * mcrypt_encrypt 解密
     * */
    function aes_decrypt($content){
        $privateKey = "abcdef1234567890";
        $iv = "helloworld123456";
        $content = base64_decode($content);
        $encrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$privateKey,$content,MCRYPT_MODE_CBC,$iv);
        return $encrypted;
    }
    function pkcs7_pad($str){
        $len = mb_strlen($str, '8bit');
        $c = 16 - ($len % 16);
        $str .= str_repeat(chr($c), $c);
        return $str;
    }

　　

php7.1开始被丢弃 可以使用openssl_encrypt

　　/**
     * 解密字符串
     * @param string $data 字符串
     * @param string $key 加密key
     * @return string
     */
    function decryptWithOpenssl($data,$key,$iv){
        return openssl_decrypt(base64_decode($data),"AES-128-CBC",$key,OPENSSL_RAW_DATA,$iv);
    }

    /**
     * 加密字符串
     * 参考网站： https://segmentfault.com/q/1010000009624263
     * @param string $data 字符串
     * @param string $key 加密key
     * @return string
     */
    function encryptWithOpenssl($data,$key,$iv){
        return base64_encode(openssl_encrypt($data,"AES-128-CBC",$key,OPENSSL_RAW_DATA,$iv));
    }

　　

使用方法

　　　　header("Content-type:text/html; charset=utf-8");
        $privateKey = "abcdef1234567890";
        $iv = "helloworld123456";
        echo "<pre>";
        $content = '章节内容加密测试121212ksjflkdjslfsdjfljs章节内容测试end';
        $aesencrypt = aes_encrypt($content);
        echo "aes_encrypt加密：".($aesencrypt);
        echo "<br/>";
        $encrypt_openssl = aes_decrypt($aesencrypt);
        echo "aes_decrypt解密：".($encrypt_openssl);
        echo "<br/>";
        $encrypt_openssl = decryptWithOpenssl($aesencrypt,$privateKey,$iv);
        echo "openssl_encrypt解密：".($encrypt_openssl);
        echo "<br/>";


        $encrypt_openssl = encryptWithOpenssl($content,$privateKey,$iv);
        echo "openssl_encrypt加密：".($encrypt_openssl);
        echo "<br/>";
        $decrypt_openssl =decryptWithOpenssl($encrypt_openssl,$privateKey,$iv);
        echo "openssl_encrypt解密：".($decrypt_openssl);
        echo "<br/>";
        $decrypt_openssl = aes_decrypt($encrypt_openssl);
        echo "aes_decrypt解密：".($decrypt_openssl);
        echo "<br/>";