How to replace mcrypt in php

How to replace mcrypt with php: 1. Open the corresponding php file; 2. Find the original encryption and decryption code; 3. Use the "openssl_encrypt" and "openssl_decrypt" methods to replace it.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

php How to replace mcrypt?

Mcrypt encryption and decryption alternative in php7.4

Problem description

The mcrypt_encrypt and mcrypt_decrypt functions have been abandoned since PHP 7.1.0. The original project (php5. 6) The mcrypt_encrypt and mcrypt_decrypt functions used in php7.1 and later environments will prompt that the function cannot be found, and you need to use openssl_encrypt and openssl_decrypt instead.

Solution

********************Encryption*************** ********

<?php
/**
 * 原加密方法方法
 * @param $str
 * @param string $key
 * @return string
 */
function des_encrypt($str, $key=&#39;uK9pFn56&#39;) {
        $block = mcrypt_get_block_size(&#39;des&#39;, &#39;ecb&#39;);
        $pad = $block - (strlen($str) % $block);
        $str .= str_repeat(chr($pad), $pad);
        return base64_encode(mcrypt_encrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB));
}
$str = "123123";
var_dump(des_encrypt($str));  //加密结果：BKG4i231OB0=

rrree

************************Decryption************ ************

<?php
/**
 * openssl_encrypt加密替代方法
 * @param $str
 * @param string $key
 * @return string
 */
function des_encrypt($str, $key = &#39;uK9pFn56&#39;)
{
    return base64_encode(openssl_encrypt($str, "DES-ECB", $key, OPENSSL_RAW_DATA, ""));
}
$str = "123123";
var_dump(des_encrypt($str));  //加密结果：BKG4i231OB0=

/**
 * 原解密方法
 * @param $str
 * @param string $key
 * @return string
 */
function des_decrypt($str, $key='uK9pFn56') {
        $str = mcrypt_decrypt(MCRYPT_DES, $key, base64_decode($str), MCRYPT_MODE_ECB);
        $len = strlen($str);
        $block = mcrypt_get_block_size('des', 'ecb');
        $pad = ord($str[$len - 1]);
        return substr($str, 0, $len - $pad);
}
var_dump(des_decrypt("BKG4i231OB0="));  //解密结果：123123

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