mambax7 / pedigree

phpthumb/phpThumb.php

<?php
//////////////////////////////////////////////////////////////
//   phpThumb() by James Heinrich <info@silisoftware.com>   //
//        available at http://phpthumb.sourceforge.net      //
//         and/or https://github.com/JamesHeinrich/phpThumb //
//////////////////////////////////////////////////////////////
///                                                         //
// See: phpthumb.changelog.txt for recent changes           //
// See: phpthumb.readme.txt for usage instructions          //
//                                                         ///
//////////////////////////////////////////////////////////////

error_reporting(E_ALL);
ini_set('display_errors', '1');

// check for magic quotes in PHP < 7.4.0 (when these functions became deprecated)
if (version_compare(PHP_VERSION, '7.4.0', '<')) {
    ini_set('magic_quotes_runtime', '0');
    if (ini_get('magic_quotes_runtime')) {
        die('"magic_quotes_runtime" is set in php.ini, cannot run phpThumb with this enabled');
    }
}
// Set a default timezone if web server has not done already in php.ini
if (!ini_get('date.timezone') && function_exists('date_default_timezone_set')) { // PHP >= 5.1.0
    date_default_timezone_set('UTC');
}
$starttime = array_sum(explode(' ', microtime())); // could be called as microtime(true) for PHP 5.0.0+

// this script relies on the superglobal arrays, fake it here for old PHP versions
if (PHP_VERSION < '4.1.0') {
    $_SERVER = $HTTP_SERVER_VARS;
    $_GET    = $HTTP_GET_VARS;
}

function SendSaveAsFileHeaderIfNeeded($getimagesize = false)
{
    if (headers_sent()) {
        return false;
    }
    global $phpThumb;
    $downloadfilename = phpthumb_functions::SanitizeFilename(!empty($_GET['sia']) ? $_GET['sia'] : (!empty($_GET['down']) ? $_GET['down'] : 'phpThumb_generated_thumbnail.' . (!empty($_GET['f']) ? $_GET['f'] : 'jpg')));
    //if (empty($_GET['sia']) && empty($_GET['down']) && !empty($phpThumb->thumbnail_image_width) && !empty($phpThumb->thumbnail_image_height)) {
    if (empty($_GET['sia']) && empty($_GET['down']) && !empty($getimagesize[0]) && !empty($getimagesize[1])) {
        // if we know the output image dimensions we can generate a better default filename
        $downloadfilename = phpthumb_functions::SanitizeFilename((!empty($phpThumb->src) ? basename($phpThumb->src) : md5($phpThumb->rawImageData)) . '-' . intval($getimagesize[0]) . 'x' . intval($getimagesize[1]) . '.' . (!empty($_GET['f']) ? $_GET['f'] : 'jpg'));
    }
    if (!empty($downloadfilename)) {
        $phpThumb->DebugMessage('SendSaveAsFileHeaderIfNeeded() sending header: Content-Disposition: ' . (!empty($_GET['down']) ? 'attachment' : 'inline') . '; filename="' . $downloadfilename . '"', __FILE__, __LINE__);
        header('Content-Disposition: ' . (!empty($_GET['down']) ? 'attachment' : 'inline') . '; filename="' . $downloadfilename . '"');
    }
    return true;
}

function RedirectToCachedFile()
{
    global $phpThumb;

    $nice_cachefile = str_replace(DIRECTORY_SEPARATOR, '/', $phpThumb->cache_filename);
    $nice_docroot   = str_replace(DIRECTORY_SEPARATOR, '/', rtrim($phpThumb->config_document_root, '/\\'));

    $parsed_url = phpthumb_functions::ParseURLbetter(@$_SERVER['HTTP_REFERER']);

    $nModified = filemtime($phpThumb->cache_filename);

    if ($phpThumb->config_nooffsitelink_enabled && !empty($_SERVER['HTTP_REFERER']) && !in_array(@$parsed_url['host'], $phpThumb->config_nooffsitelink_valid_domains)) {
        $phpThumb->DebugMessage(
            'Would have used cached (image/'
            . $phpThumb->thumbnailFormat
            . ') file "'
            . $phpThumb->cache_filename
            . '" (Last-Modified: '
            . gmdate('D, d M Y H:i:s', $nModified)
            . ' GMT), but skipping because $_SERVER[HTTP_REFERER] ('
            . @$_SERVER['HTTP_REFERER']
            . ') is not in $phpThumb->config_nooffsitelink_valid_domains ('
            . implode(';', $phpThumb->config_nooffsitelink_valid_domains)
            . ')',
            __FILE__,
            __LINE__
        );
    } elseif ($phpThumb->phpThumbDebug) {
        $phpThumb->DebugTimingMessage('skipped using cached image', __FILE__, __LINE__);
        $phpThumb->DebugMessage('Would have used cached file, but skipping due to phpThumbDebug', __FILE__, __LINE__);
        $phpThumb->DebugMessage('* Would have sent headers (1): Last-Modified: ' . gmdate('D, d M Y H:i:s', $nModified) . ' GMT', __FILE__, __LINE__);
        if ($getimagesize = @getimagesize($phpThumb->cache_filename)) {
            $phpThumb->DebugMessage('* Would have sent headers (2): Content-Type: ' . phpthumb_functions::ImageTypeToMIMEtype($getimagesize[2]), __FILE__, __LINE__);

Are you sure phpthumb_functions::ImageTypeToMIMEtype($getimagesize[2]) of type false|mixed|string can be used in concatenation?

        }
        if (preg_match('#^' . preg_quote($nice_docroot) . '(.*)$#', $nice_cachefile, $matches)) {
            $phpThumb->DebugMessage('* Would have sent headers (3): Location: ' . dirname($matches[1]) . '/' . urlencode(basename($matches[1])), __FILE__, __LINE__);
        } else {
            $phpThumb->DebugMessage('* Would have sent data: file_get_contents(' . $phpThumb->cache_filename . ')', __FILE__, __LINE__);
        }
    } else {
        if (headers_sent()) {
            $phpThumb->ErrorImage('Headers already sent (' . basename(__FILE__) . ' line ' . __LINE__ . ')');
            exit;

Using exit here is not recommended.

        }
        $getimagesize = @getimagesize($phpThumb->cache_filename);
        SendSaveAsFileHeaderIfNeeded($getimagesize);

        header('Pragma: private');
        header('Cache-Control: max-age=' . $phpThumb->getParameter('config_cache_maxage'));
        header('Expires: ' . date(DATE_RFC1123, time() + $phpThumb->getParameter('config_cache_maxage')));
        if (!empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) && ($nModified == strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])) && !empty($_SERVER['SERVER_PROTOCOL'])) {
            header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $nModified) . ' GMT');
            header($_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified');
            exit;
        }
        header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $nModified) . ' GMT');
        header('ETag: "' . md5_file($phpThumb->cache_filename) . '"');
        if (!empty($getimagesize[2])) {
            header('Content-Type: ' . phpthumb_functions::ImageTypeToMIMEtype($getimagesize[2]));
        } elseif (preg_match('#\\.ico$#i', $phpThumb->cache_filename)) {
            header('Content-Type: image/x-icon');
        }
        header('Content-Length: ' . filesize($phpThumb->cache_filename));
        if (empty($phpThumb->config_cache_force_passthru) && preg_match('#^' . preg_quote($nice_docroot) . '(.*)$#', $nice_cachefile, $matches)) {
            header('Location: ' . dirname($matches[1]) . '/' . urlencode(basename($matches[1])));
        } else {
            echo file_get_contents($phpThumb->cache_filename);
        }
        exit;

Using exit here is not recommended.

    }
    return true;
}

// instantiate a new phpThumb() object
ob_start();
if (!include_once __DIR__ . '/phpthumb.class.php') {
    ob_end_flush();
    die('failed to include_once("' . realpath(__DIR__ . '/phpthumb.class.php') . '")');
}
ob_end_clean();
$phpThumb = new phpThumb();
$phpThumb->DebugTimingMessage('phpThumb.php start', __FILE__, __LINE__, $starttime);
$phpThumb->setParameter('config_error_die_on_error', true);

if (!phpthumb_functions::FunctionIsDisabled('set_time_limit')) {
    set_time_limit(60);  // shouldn't take nearly this long in most cases, but with many filters and/or a slow server...
}

// phpThumbDebug[0] used to be here, but may reveal too much
// info when high_security_mode should be enabled (not set yet)

if (file_exists(__DIR__ . '/phpThumb.config.php')) {
    ob_start();
    if (include_once __DIR__ . '/phpThumb.config.php') {
        // great
    } else {
        ob_end_flush();
        $phpThumb->config_disable_debug = false; // otherwise error message won't print
        $phpThumb->ErrorImage('failed to include_once(' . __DIR__ . '/phpThumb.config.php) - realpath="' . realpath(__DIR__ . '/phpThumb.config.php') . '"');
    }
    ob_end_clean();
} elseif (file_exists(__DIR__ . '/phpThumb.config.php.default')) {
    $phpThumb->config_disable_debug = false; // otherwise error message won't print
    $phpThumb->ErrorImage('Please rename "phpThumb.config.php.default" to "phpThumb.config.php"');
} else {
    $phpThumb->config_disable_debug = false; // otherwise error message won't print
    $phpThumb->ErrorImage('failed to include_once(' . __DIR__ . '/phpThumb.config.php) - realpath="' . realpath(__DIR__ . '/phpThumb.config.php') . '"');
}

if (!empty($PHPTHUMB_CONFIG)) {
    foreach ($PHPTHUMB_CONFIG as $key => $value) {
        $keyname = 'config_' . $key;
        $phpThumb->setParameter($keyname, $value);
        if (!preg_match('#(password|mysql)#i', $key)) {
            $phpThumb->DebugMessage('setParameter(' . $keyname . ', ' . $phpThumb->phpThumbDebugVarDump($value) . ')', __FILE__, __LINE__);
        }
    }
    if (!$phpThumb->config_disable_debug) {
        // if debug mode is enabled, force phpThumbDebug output, do not allow normal thumbnails to be generated
        $_GET['phpThumbDebug'] = (!empty($_GET['phpThumbDebug']) ? max(1, (int)$_GET['phpThumbDebug']) : 9);
        $phpThumb->setParameter('phpThumbDebug', $_GET['phpThumbDebug']);
    }
} else {
    $phpThumb->DebugMessage('$PHPTHUMB_CONFIG is empty', __FILE__, __LINE__);
}

if (empty($phpThumb->config_disable_pathinfo_parsing) && (empty($_GET) || isset($_GET['phpThumbDebug'])) && !empty($_SERVER['PATH_INFO'])) {
    $_SERVER['PHP_SELF'] = str_replace($_SERVER['PATH_INFO'], '', @$_SERVER['PHP_SELF']);

    $args = explode(';', substr($_SERVER['PATH_INFO'], 1));
    $phpThumb->DebugMessage('PATH_INFO.$args set to (' . implode(')(', $args) . ')', __FILE__, __LINE__);
    if (!empty($args)) {
        $_GET['src'] = @$args[count($args) - 1];
        $phpThumb->DebugMessage('PATH_INFO."src" = "' . $_GET['src'] . '"', __FILE__, __LINE__);
        if (preg_match('#^new\=([a-z0-9]+)#i', $_GET['src'], $matches)) {
            unset($_GET['src']);
            $_GET['new'] = $matches[1];
        }
    }
    if (preg_match('#^([\d]*)x?([\d]*)$#i', @$args[count($args) - 2], $matches)) {
        $_GET['w'] = $matches[1];
        $_GET['h'] = $matches[2];
        $phpThumb->DebugMessage('PATH_INFO."w"x"h" set to "' . $_GET['w'] . '"x"' . $_GET['h'] . '"', __FILE__, __LINE__);
    }
    for ($i = 0; $i < count($args) - 2; $i++) {
        @list($key, $value) = explode('=', @$args[$i]);
        if (substr($key, -2) == '[]') {
            $array_key_name          = substr($key, 0, -2);
            $_GET[$array_key_name][] = $value;
            $phpThumb->DebugMessage('PATH_INFO."' . $array_key_name . '[]" = "' . $value . '"', __FILE__, __LINE__);
        } else {
            $_GET[$key] = $value;
            $phpThumb->DebugMessage('PATH_INFO."' . $key . '" = "' . $value . '"', __FILE__, __LINE__);
        }
    }
}

if (!empty($phpThumb->config_high_security_enabled)) {
    if (empty($_GET['hash'])) {
        $phpThumb->config_disable_debug = false; // otherwise error message won't print
        $phpThumb->ErrorImage('ERROR: missing hash');
    } elseif (phpthumb_functions::PasswordStrength($phpThumb->config_high_security_password) < 20) {
        $phpThumb->config_disable_debug = false; // otherwise error message won't print
        $phpThumb->ErrorImage('ERROR: $PHPTHUMB_CONFIG[high_security_password] is not complex enough');
    } elseif ($_GET['hash'] != md5(str_replace($phpThumb->config_high_security_url_separator . 'hash=' . $_GET['hash'], '', $_SERVER['QUERY_STRING']) . $phpThumb->config_high_security_password)) {
        header('HTTP/1.0 403 Forbidden');
        sleep(10); // deliberate delay to discourage password-guessing
        $phpThumb->ErrorImage('ERROR: invalid hash');
    }
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[0]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '0')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

// check for magic quotes in PHP < 7.4.0 (when these functions became deprecated)
if (version_compare(PHP_VERSION, '7.4.0', '<')) {
    // returned the fixed string if the evil "magic_quotes_gpc" setting is on
    if (get_magic_quotes_gpc()) {
        // deprecated: 'err', 'file', 'goto',
        $RequestVarsToStripSlashes = ['src', 'wmf', 'down'];
        foreach ($RequestVarsToStripSlashes as $key) {
            if (isset($_GET[$key])) {
                if (is_string($_GET[$key])) {
                    $_GET[$key] = stripslashes($_GET[$key]);
                } else {
                    unset($_GET[$key]);
                }
            }
        }
    }
}

if (empty($_SERVER['PATH_INFO']) && empty($_SERVER['QUERY_STRING'])) {
    $phpThumb->config_disable_debug = false; // otherwise error message won't print
    $phpThumb->ErrorImage('ERROR: no parameters specified');
}

if (!empty($_GET['src']) && isset($_GET['md5s']) && empty($_GET['md5s'])) {
    $md5s = '';
    if (preg_match('#^([a-z0-9]+)://#i', $_GET['src'], $protocol_matches)) {
        if (preg_match('#^(f|ht)tps?://#i', $_GET['src'])) {
            if ($rawImageData = phpthumb_functions::SafeURLread($_GET['src'], $error, $phpThumb->config_http_fopen_timeout, $phpThumb->config_http_follow_redirect)) {
                $md5s = md5($rawImageData);
            }
        } else {
            $phpThumb->ErrorImage('only FTP and HTTP/HTTPS protocols are allowed, "' . $protocol_matches[1] . '" is not');
        }
    } else {
        $SourceFilename = $phpThumb->ResolveFilenameToAbsolute($_GET['src']);
        if (is_readable($SourceFilename)) {

It seems like $SourceFilename can also be of type false and null; however, parameter $filename of is_readable() does only seem to accept string, maybe add an additional type check?

            $md5s = phpthumb_functions::md5_file_safe($SourceFilename);
        } else {
            $phpThumb->ErrorImage('ERROR: "' . $SourceFilename . '" cannot be read');
        }
    }
    if (!empty($_SERVER['HTTP_REFERER'])) {
        $phpThumb->ErrorImage('&md5s=' . $md5s);

Are you sure $md5s of type false|string can be used in concatenation?

    } else {
        die('&md5s=' . $md5s);
    }
}

if (!empty($_GET['src']) && empty($phpThumb->config_allow_local_http_src) && preg_match('#^http://' . @$_SERVER['HTTP_HOST'] . '(.+)#i', $_GET['src'], $matches)) {
    $phpThumb->ErrorImage('It is MUCH better to specify the "src" parameter as "' . $matches[1] . '" instead of "' . $matches[0] . '".' . "\n\n" . 'If you really must do it this way, enable "allow_local_http_src" in phpThumb.config.php');
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[1]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '1')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

$parsed_url_referer = phpthumb_functions::ParseURLbetter(@$_SERVER['HTTP_REFERER']);
if ($phpThumb->config_nooffsitelink_require_refer && !in_array(@$parsed_url_referer['host'], $phpThumb->config_nohotlink_valid_domains)) {
    $phpThumb->ErrorImage('config_nooffsitelink_require_refer enabled and ' . (@$parsed_url_referer['host'] ? '"' . $parsed_url_referer['host'] . '" is not an allowed referer' : 'no HTTP_REFERER exists'));
}
$parsed_url_src = phpthumb_functions::ParseURLbetter(@$_GET['src']);
if ($phpThumb->config_nohotlink_enabled && $phpThumb->config_nohotlink_erase_image && preg_match('#^(f|ht)tps?://#i', @$_GET['src']) && !in_array(@$parsed_url_src['host'], $phpThumb->config_nohotlink_valid_domains)) {
    $phpThumb->ErrorImage($phpThumb->config_nohotlink_text_message);
}

if ($phpThumb->config_mysql_query) {
    if ($phpThumb->config_mysql_extension == 'mysqli') {
        $found_missing_function = false;
        foreach (['mysqli_connect'] as $required_mysqli_function) {
            if (!function_exists($required_mysqli_function)) {
                $found_missing_function = $required_mysqli_function;
                break;
            }
        }
        if ($found_missing_function) {
            $phpThumb->ErrorImage('SQL function unavailable: ' . $found_missing_function);
        } else {
            $mysqli = new mysqli($phpThumb->config_mysql_hostname, $phpThumb->config_mysql_username, $phpThumb->config_mysql_password, $phpThumb->config_mysql_database);
            if ($mysqli->connect_error) {
                $phpThumb->ErrorImage('MySQLi connect error (' . $mysqli->connect_errno . ') ' . $mysqli->connect_error);
            } else {
                if ($result = $mysqli->query($phpThumb->config_mysql_query)) {
                    if ($row = $result->fetch_array()) {
                        $result->free();
                        $mysqli->close();
                        $phpThumb->setSourceData($row[0]);
                        unset($row);
                    } else {
                        $result->free();
                        $mysqli->close();
                        $phpThumb->ErrorImage('no matching data in database.');
                    }
                } else {
                    $mysqli->close();
                    $phpThumb->ErrorImage('Error in MySQL query: "' . $mysqli->error . '"');
                }
            }
            unset($_GET['id']);
        }
    } elseif ($phpThumb->config_mysql_extension == 'mysql') {
        $found_missing_function = false;
        //foreach (array('mysql_connect', 'mysql_select_db', 'mysql_query', 'mysql_fetch_array', 'mysql_free_result', 'mysql_close', 'mysql_error') as $required_mysql_function) {
        foreach (['mysql_connect'] as $required_mysql_function) {
            if (!function_exists($required_mysql_function)) {
                $found_missing_function = $required_mysql_function;
                break;
            }
        }
        if ($found_missing_function) {
            $phpThumb->ErrorImage('SQL function unavailable: ' . $found_missing_function);
        } else {
            if ($cid = @mysql_connect($phpThumb->config_mysql_hostname, $phpThumb->config_mysql_username, $phpThumb->config_mysql_password)) {
                if (@mysql_select_db($phpThumb->config_mysql_database, $cid)) {
                    if ($result = @mysql_query($phpThumb->config_mysql_query, $cid)) {
                        if ($row = @mysql_fetch_array($result)) {

It seems like $result can also be of type true; however, parameter $result of mysql_fetch_array() does only seem to accept resource, maybe add an additional type check?

                            mysql_free_result($result);

It seems like $result can also be of type true; however, parameter $result of mysql_free_result() does only seem to accept resource, maybe add an additional type check?

                            mysql_close($cid);
                            $phpThumb->setSourceData($row[0]);
                            unset($row);
                        } else {
                            mysql_free_result($result);
                            mysql_close($cid);
                            $phpThumb->ErrorImage('no matching data in database.');
                        }
                    } else {
                        mysql_close($cid);
                        $phpThumb->ErrorImage('Error in MySQL query: "' . mysql_error($cid) . '"');
                    }
                } else {
                    mysql_close($cid);
                    $phpThumb->ErrorImage('cannot select MySQL database: "' . mysql_error($cid) . '"');
                }
            } else {
                $phpThumb->ErrorImage('cannot connect to MySQL server');
            }
            unset($_GET['id']);
        }
    } else {
        $phpThumb->ErrorImage('config_mysql_extension not supported');
    }
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[2]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '2')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

$PHPTHUMB_DEFAULTS_DISABLEGETPARAMS = (bool)($phpThumb->config_cache_default_only_suffix && (strpos($phpThumb->config_cache_default_only_suffix, '*') !== false));

$phpThumb->config_cache_default_only_suffix of type true is incompatible with the type string expected by parameter $haystack of strpos().

// deprecated: 'err', 'file', 'goto',
$allowedGETparameters = ['src', 'new', 'w', 'h', 'wp', 'hp', 'wl', 'hl', 'ws', 'hs', 'f', 'q', 'sx', 'sy', 'sw', 'sh', 'zc', 'ica', 'bc', 'bg', 'bgt', 'fltr', 'xto', 'ra', 'ar', 'aoe', 'far', 'iar', 'maxb', 'down', 'phpThumbDebug', 'hash', 'md5s', 'sfn', 'dpi', 'sia', 'nocache'];
foreach ($_GET as $key => $value) {
    if (!empty($PHPTHUMB_DEFAULTS_DISABLEGETPARAMS) && ($key != 'src')) {
        // disabled, do not set parameter
        $phpThumb->DebugMessage('ignoring $_GET[' . $key . '] because of $PHPTHUMB_DEFAULTS_DISABLEGETPARAMS', __FILE__, __LINE__);
    } elseif (in_array($key, $allowedGETparameters)) {
        $phpThumb->DebugMessage('setParameter(' . $key . ', ' . $phpThumb->phpThumbDebugVarDump($value) . ')', __FILE__, __LINE__);
        $phpThumb->setParameter($key, $value);
    } else {
        $phpThumb->ErrorImage('Forbidden parameter: ' . $key);
    }
}

if (!empty($PHPTHUMB_DEFAULTS) && is_array($PHPTHUMB_DEFAULTS)) {
    $phpThumb->DebugMessage('setting $PHPTHUMB_DEFAULTS[' . implode(';', array_keys($PHPTHUMB_DEFAULTS)) . ']', __FILE__, __LINE__);
    foreach ($PHPTHUMB_DEFAULTS as $key => $value) {
        if (!$PHPTHUMB_DEFAULTS_GETSTRINGOVERRIDE || !isset($_GET[$key])) { // set parameter to default value if config is set to allow _GET to override default, OR if no value is passed via _GET for this parameter
            //$_GET[$key] = $value;
            //$phpThumb->DebugMessage('PHPTHUMB_DEFAULTS assigning ('.(is_array($value) ? print_r($value, true) : $value).') to $_GET['.$key.']', __FILE__, __LINE__);
            $phpThumb->setParameter($key, $value);
            $phpThumb->DebugMessage('setParameter(' . $key . ', ' . $phpThumb->phpThumbDebugVarDump($value) . ') from $PHPTHUMB_DEFAULTS', __FILE__, __LINE__);
        }
    }
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[3]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '3')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

//if (!@$_GET['phpThumbDebug'] && !is_file($phpThumb->sourceFilename) && !phpthumb_functions::gd_version()) {
//	if (!headers_sent()) {
//		// base64-encoded error image in GIF format
//		$ERROR_NOGD = 'R0lGODlhIAAgALMAAAAAABQUFCQkJDY2NkZGRldXV2ZmZnJycoaGhpSUlKWlpbe3t8XFxdXV1eTk5P7+/iwAAAAAIAAgAAAE/vDJSau9WILtTAACUinDNijZtAHfCojS4W5H+qxD8xibIDE9h0OwWaRWDIljJSkUJYsN4bihMB8th3IToAKs1VtYM75cyV8sZ8vygtOE5yMKmGbO4jRdICQCjHdlZzwzNW4qZSQmKDaNjhUMBX4BBAlmMywFSRWEmAI6b5gAlhNxokGhooAIK5o/pi9vEw4Lfj4OLTAUpj6IabMtCwlSFw0DCKBoFqwAB04AjI54PyZ+yY3TD0ss2YcVmN/gvpcu4TOyFivWqYJlbAHPpOntvxNAACcmGHjZzAZqzSzcq5fNjxFmAFw9iFRunD1epU6tsIPmFCAJnWYE0FURk7wJDA0MTKpEzoWAAskiAAA7';
//		header('Content-Type: image/gif');
//		echo base64_decode($ERROR_NOGD);
//	} else {
//		echo '*** ERROR: No PHP-GD support available ***';
//	}
//	exit;
//}

// check to see if file can be output from source with no processing or caching
$CanPassThroughDirectly = true;
if ($phpThumb->rawImageData) {
    // data from SQL, should be fine
} elseif (preg_match('#^https?\\://[^\\?&]+\\.(jpe?g|gif|png|webp)$#i', $phpThumb->src)) {
    // assume is ok to passthru if no other parameters specified
} elseif (preg_match('#^(f|ht)tps?\\://#i', $phpThumb->src)) {
    $phpThumb->DebugMessage('$CanPassThroughDirectly=false because preg_match("#^(f|ht)tps?://#i", ' . $phpThumb->src . ')', __FILE__, __LINE__);
    $CanPassThroughDirectly = false;
} elseif (!@is_readable($phpThumb->sourceFilename)) {
    $phpThumb->DebugMessage('$CanPassThroughDirectly=false because !@is_readable(' . $phpThumb->sourceFilename . ')', __FILE__, __LINE__);
    $CanPassThroughDirectly = false;
} elseif (!@is_file($phpThumb->sourceFilename)) {
    $phpThumb->DebugMessage('$CanPassThroughDirectly=false because !@is_file(' . $phpThumb->sourceFilename . ')', __FILE__, __LINE__);
    $CanPassThroughDirectly = false;
}
foreach ($_GET as $key => $value) {
    switch ($key) {
        case 'src':
            // allowed
            break;

        case 'w':
        case 'h':
            // might be OK if exactly matches original
            if (preg_match('#^https?\\://[^\\?&]+\\.(jpe?g|gif|png|webp)$#i', $phpThumb->src)) {
                // assume it is not ok for direct-passthru of remote image
                $CanPassThroughDirectly = false;
            }
            break;

        case 'phpThumbDebug':
            // handled in direct-passthru code
            break;

        default:
            // all other parameters will cause some processing,
            // therefore cannot pass through original image unmodified
            $CanPassThroughDirectly = false;
            $UnAllowedGET[]         = $key;
            break;
    }
}
if (!empty($UnAllowedGET)) {
    $phpThumb->DebugMessage('$CanPassThroughDirectly=false because $_GET[' . implode(';', array_unique($UnAllowedGET)) . '] are set', __FILE__, __LINE__);
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[4]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '4')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

$phpThumb->DebugMessage('$CanPassThroughDirectly="' . (int)$CanPassThroughDirectly . '" && $phpThumb->src="' . $phpThumb->src . '"', __FILE__, __LINE__);
while ($CanPassThroughDirectly && $phpThumb->src) {
    // no parameters set, passthru

    if (preg_match('#^https?\\://[^\\?&]+\.(jpe?g|gif|png|webp)$#i', $phpThumb->src)) {
        $phpThumb->DebugMessage('Passing HTTP source through directly as Location: redirect (' . $phpThumb->src . ')', __FILE__, __LINE__);
        header('Location: ' . $phpThumb->src);
        exit;
    }

    $SourceFilename = $phpThumb->ResolveFilenameToAbsolute($phpThumb->src);

    // security and size checks
    if ($phpThumb->getimagesizeinfo = @getimagesize($SourceFilename)) {

It seems like $SourceFilename can also be of type false and null; however, parameter $filename of getimagesize() does only seem to accept string, maybe add an additional type check?

        $phpThumb->DebugMessage('Direct passthru getimagesize() returned [w=' . $phpThumb->getimagesizeinfo[0] . ';h=' . $phpThumb->getimagesizeinfo[1] . ';t=' . $phpThumb->getimagesizeinfo[2] . ']', __FILE__, __LINE__);

        if (!@$_GET['w'] && !@$_GET['wp'] && !@$_GET['wl'] && !@$_GET['ws'] && !@$_GET['h'] && !@$_GET['hp'] && !@$_GET['hl'] && !@$_GET['hs']) {
            // no resizing needed
            $phpThumb->DebugMessage('Passing "' . $SourceFilename . '" through directly, no resizing required ("' . $phpThumb->getimagesizeinfo[0] . '"x"' . $phpThumb->getimagesizeinfo[1] . '")', __FILE__, __LINE__);
        } elseif (($phpThumb->getimagesizeinfo[0] <= @$_GET['w']) && ($phpThumb->getimagesizeinfo[1] <= @$_GET['h']) && ((@$_GET['w'] == $phpThumb->getimagesizeinfo[0]) || (@$_GET['h'] == $phpThumb->getimagesizeinfo[1]))) {
            // image fits into 'w'x'h' box, and at least one dimension matches exactly, therefore no resizing needed
            $phpThumb->DebugMessage('Passing "' . $SourceFilename . '" through directly, no resizing required ("' . $phpThumb->getimagesizeinfo[0] . '"x"' . $phpThumb->getimagesizeinfo[1] . '" fits inside "' . @$_GET['w'] . '"x"' . @$_GET['h'] . '")', __FILE__, __LINE__);
        } else {
            $phpThumb->DebugMessage('Not passing "' . $SourceFilename . '" through directly because resizing required (from "' . $phpThumb->getimagesizeinfo[0] . '"x"' . $phpThumb->getimagesizeinfo[1] . '" to "' . @$_GET['w'] . '"x"' . @$_GET['h'] . '")', __FILE__, __LINE__);
            break;
        }
        switch ($phpThumb->getimagesizeinfo[2]) {
            case  1: // GIF
            case  2: // JPG
            case  3: // PNG
            case 18: // WEBP
                // great, let it through
                break;
            default:
                // browser probably can't handle format, remangle it to JPEG/PNG/GIF
                $phpThumb->DebugMessage('Not passing "' . $SourceFilename . '" through directly because $phpThumb->getimagesizeinfo[2] = "' . $phpThumb->getimagesizeinfo[2] . '"', __FILE__, __LINE__);
                break 2;
        }

        $ImageCreateFunctions   = [1 => 'imagecreatefromgif', 2 => 'imagecreatefromjpeg', 3 => 'imagecreatefrompng', 18 => 'imagecreatefromwebp'];
        $theImageCreateFunction = @$ImageCreateFunctions[$phpThumb->getimagesizeinfo[2]];
        $dummyImage             = false;
        if ($phpThumb->config_disable_onlycreateable_passthru || (function_exists($theImageCreateFunction) && ($dummyImage = @$theImageCreateFunction($SourceFilename)))) {
            // great
            if (@is_resource($dummyImage) || (@is_object($dummyImage) && $dummyImage instanceof \GdImage)) {
                unset($dummyImage);
            }

            if (headers_sent()) {
                $phpThumb->ErrorImage('Headers already sent (' . basename(__FILE__) . ' line ' . __LINE__ . ')');
                exit;
            }
            if (!empty($_GET['phpThumbDebug'])) {
                $phpThumb->DebugTimingMessage('skipped direct $SourceFilename passthru', __FILE__, __LINE__);
                $phpThumb->DebugMessage('Would have passed "' . $SourceFilename . '" through directly, but skipping due to phpThumbDebug', __FILE__, __LINE__);
                break;
            }

            SendSaveAsFileHeaderIfNeeded($phpThumb->getimagesizeinfo);
            header('Last-Modified: ' . gmdate('D, d M Y H:i:s', @filemtime($SourceFilename)) . ' GMT');

It seems like @filemtime($SourceFilename) can also be of type false; however, parameter $timestamp of gmdate() does only seem to accept integer|null, maybe add an additional type check?

It seems like $SourceFilename can also be of type false and null; however, parameter $filename of filemtime() does only seem to accept string, maybe add an additional type check?

            if ($contentType = phpthumb_functions::ImageTypeToMIMEtype(@$phpThumb->getimagesizeinfo[2])) {
                header('Content-Type: ' . $contentType);
            }
            echo file_get_contents($SourceFilename);

It seems like $SourceFilename can also be of type false and null; however, parameter $filename of file_get_contents() does only seem to accept string, maybe add an additional type check?

            exit;
        } else {
            $phpThumb->DebugMessage('Not passing "' . $SourceFilename . '" through directly because ($phpThumb->config_disable_onlycreateable_passthru = "' . $phpThumb->config_disable_onlycreateable_passthru . '") and ' . $theImageCreateFunction . '() failed', __FILE__, __LINE__);

Are you sure $phpThumb->config_disable_onlycreateable_passthru of type false can be used in concatenation?

            break;
        }
    } else {
        $phpThumb->DebugMessage('Not passing "' . $SourceFilename . '" through directly because getimagesize() failed', __FILE__, __LINE__);
        break;
    }
    break;
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[5]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '5')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

// check to see if file already exists in cache, and output it with no processing if it does
$phpThumb->SetCacheFilename();
if (@is_readable($phpThumb->cache_filename)) {
    RedirectToCachedFile();
} else {
    $phpThumb->DebugMessage('Cached file "' . $phpThumb->cache_filename . '" does not exist, processing as normal', __FILE__, __LINE__);
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[6]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '6')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

if ($phpThumb->rawImageData) {
    // great

} elseif (!empty($_GET['new'])) {
    // generate a blank image resource of the specified size/background color/opacity
    if (($phpThumb->w <= 0) || ($phpThumb->h <= 0)) {
        $phpThumb->ErrorImage('"w" and "h" parameters required for "new"');
    }
    @list($bghexcolor, $opacity) = explode('|', $_GET['new']);
    if (!phpthumb_functions::IsHexColor($bghexcolor)) {
        $phpThumb->ErrorImage('BGcolor parameter for "new" is not valid');
    }
    $opacity = ('' !== $opacity ? $opacity : 100);
    if ($phpThumb->gdimg_source = phpthumb_functions::ImageCreateFunction($phpThumb->w, $phpThumb->h)) {
        $alpha = (100 - min(100, max(0, $opacity))) * 1.27;
        if ($alpha) {
            $phpThumb->setParameter('is_alpha', true);
            imagealphablending($phpThumb->gdimg_source, false);
            imagesavealpha($phpThumb->gdimg_source, true);
        }
        $new_background_color = phpthumb_functions::ImageHexColorAllocate($phpThumb->gdimg_source, $bghexcolor, false, $alpha);
        imagefilledrectangle($phpThumb->gdimg_source, 0, 0, $phpThumb->w, $phpThumb->h, $new_background_color);
    } else {
        $phpThumb->ErrorImage('failed to create "new" image (' . $phpThumb->w . 'x' . $phpThumb->h . ')');
    }
} elseif (!$phpThumb->src) {
    $phpThumb->ErrorImage('Usage: ' . $_SERVER['PHP_SELF'] . '?src=/path/and/filename.jpg' . "\n" . 'read Usage comments for details');
} elseif (preg_match('#^([a-z0-9]+)://#i', $_GET['src'], $protocol_matches)) {
    if (preg_match('#^(f|ht)tps?://#i', $_GET['src'])) {
        $phpThumb->DebugMessage('$phpThumb->src (' . $phpThumb->src . ') is remote image, attempting to download', __FILE__, __LINE__);
        if ($phpThumb->config_http_user_agent) {
            $phpThumb->DebugMessage('Setting "user_agent" to "' . $phpThumb->config_http_user_agent . '"', __FILE__, __LINE__);
            ini_set('user_agent', $phpThumb->config_http_user_agent);
        }
        $cleanedupurl = phpthumb_functions::CleanUpURLencoding($phpThumb->src);
        $phpThumb->DebugMessage('CleanUpURLencoding(' . $phpThumb->src . ') returned "' . $cleanedupurl . '"', __FILE__, __LINE__);
        $phpThumb->src = $cleanedupurl;
        unset($cleanedupurl);
        if ($rawImageData = phpthumb_functions::SafeURLread($phpThumb->src, $error, $phpThumb->config_http_fopen_timeout, $phpThumb->config_http_follow_redirect)) {
            $phpThumb->DebugMessage('SafeURLread(' . $phpThumb->src . ') succeeded' . ($error ? ' with messages: "' . $error . '"' : ''), __FILE__, __LINE__);
            $phpThumb->DebugMessage('Setting source data from URL "' . $phpThumb->src . '"', __FILE__, __LINE__);
            $phpThumb->setSourceData($rawImageData, urlencode($phpThumb->src));
        } else {
            $phpThumb->ErrorImage($error);
        }
    } else {
        $phpThumb->ErrorImage('only FTP and HTTP/HTTPS protocols are allowed, "' . $protocol_matches[1] . '" is not');
    }
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[7]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '7')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

$phpThumb->GenerateThumbnail();

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[8]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '8')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

if (!empty($phpThumb->config_high_security_enabled) && !empty($_GET['nocache'])) {
    // cache disabled, don't write cachefile

} else {
    phpthumb_functions::EnsureDirectoryExists(dirname($phpThumb->cache_filename));
    if (is_writable(dirname($phpThumb->cache_filename)) || (file_exists($phpThumb->cache_filename) && is_writable($phpThumb->cache_filename))) {
        $phpThumb->CleanUpCacheDirectory();
        if ($phpThumb->RenderToFile($phpThumb->cache_filename) && is_readable($phpThumb->cache_filename)) {
            chmod($phpThumb->cache_filename, 0644);
            RedirectToCachedFile();
        } else {
            $phpThumb->DebugMessage('Failed: RenderToFile(' . $phpThumb->cache_filename . ')', __FILE__, __LINE__);
        }
    } else {
        $phpThumb->DebugMessage('Cannot write to $phpThumb->cache_filename (' . $phpThumb->cache_filename . ') because that directory (' . dirname($phpThumb->cache_filename) . ') is not writable', __FILE__, __LINE__);
    }
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[9]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '9')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

if (!$phpThumb->OutputThumbnail()) {
    $phpThumb->ErrorImage('Error in OutputThumbnail():' . "\n" . $phpThumb->debugmessages[count($phpThumb->debugmessages) - 1]);
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[10]', __FILE__, __LINE__);
if (isset($_GET['phpThumbDebug']) && ($_GET['phpThumbDebug'] == '10')) {
    $phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////