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<?php
declare(strict_types=1);
namespace PhpMyAdmin;
use Throwable;
use function array_pop;
use function array_slice;
use function basename;
use function count;
use function debug_backtrace;
use function explode;
use function function_exists;
use function get_class;
use function gettype;
use function htmlspecialchars;
use function implode;
use function in_array;
use function is_object;
use function is_scalar;
use function is_string;
use function mb_substr;
use function md5;
use function realpath;
use function serialize;
use function str_replace;
use function var_export;
use const DIRECTORY_SEPARATOR;
use const E_COMPILE_ERROR;
use const E_COMPILE_WARNING;
use const E_CORE_ERROR;
use const E_CORE_WARNING;
use const E_DEPRECATED;
use const E_ERROR;
use const E_NOTICE;
use const E_PARSE;
use const E_RECOVERABLE_ERROR;
use const E_STRICT;
use const E_USER_DEPRECATED;
use const E_USER_ERROR;
use const E_USER_NOTICE;
use const E_USER_WARNING;
use const E_WARNING;
use const PATH_SEPARATOR;
/**
* a single error
*/
class Error extends Message
{
/**
* Error types
*
* @var array
*/
public static $errortype = [
0 => 'Internal error',
E_ERROR => 'Error',
E_WARNING => 'Warning',
E_PARSE => 'Parsing Error',
E_NOTICE => 'Notice',
E_CORE_ERROR => 'Core Error',
E_CORE_WARNING => 'Core Warning',
E_COMPILE_ERROR => 'Compile Error',
E_COMPILE_WARNING => 'Compile Warning',
E_USER_ERROR => 'User Error',
E_USER_WARNING => 'User Warning',
E_USER_NOTICE => 'User Notice',
E_STRICT => 'Runtime Notice',
E_DEPRECATED => 'Deprecation Notice',
E_USER_DEPRECATED => 'Deprecation Notice',
E_RECOVERABLE_ERROR => 'Catchable Fatal Error',
];
/**
* Error levels
*
* @var array
*/
public static $errorlevel = [
0 => 'error',
E_ERROR => 'error',
E_WARNING => 'error',
E_PARSE => 'error',
E_NOTICE => 'notice',
E_CORE_ERROR => 'error',
E_CORE_WARNING => 'error',
E_COMPILE_ERROR => 'error',
E_COMPILE_WARNING => 'error',
E_USER_ERROR => 'error',
E_USER_WARNING => 'error',
E_USER_NOTICE => 'notice',
E_STRICT => 'notice',
E_DEPRECATED => 'notice',
E_USER_DEPRECATED => 'notice',
E_RECOVERABLE_ERROR => 'error',
];
/**
* The file in which the error occurred
*
* @var string
*/
protected $file = '';
/**
* The line in which the error occurred
*
* @var int
*/
protected $line = 0;
/**
* Holds the backtrace for this error
*
* @var array
*/
protected $backtrace = [];
/**
* Hide location of errors
*
* @var bool
*/
protected $hideLocation = false;
/**
* @param int $errno error number
* @param string $errstr error message
* @param string $errfile file
* @param int $errline line
*/
public function __construct(int $errno, string $errstr, string $errfile, int $errline)
{
parent::__construct();
$this->setNumber($errno);
$this->setMessage($errstr, false);
$this->setFile($errfile);
$this->setLine($errline);
// This function can be disabled in php.ini
if (function_exists('debug_backtrace')) {
$backtrace = @debug_backtrace();
// remove last three calls:
// debug_backtrace(), handleError() and addError()
$backtrace = array_slice($backtrace, 3);
} else {
$backtrace = [];
}
$this->setBacktrace($backtrace);
}
/**
* Process backtrace to avoid path disclosures, objects and so on
*
* @param array $backtrace backtrace
*
* @return array
*/
public static function processBacktrace(array $backtrace): array
{
$result = [];
$members = [
'line',
'function',
'class',
'type',
];
foreach ($backtrace as $idx => $step) {
/* Create new backtrace entry */
$result[$idx] = [];
/* Make path relative */
if (isset($step['file'])) {
$result[$idx]['file'] = self::relPath($step['file']);
}
/* Store members we want */
foreach ($members as $name) {
if (! isset($step[$name])) {
continue;
}
$result[$idx][$name] = $step[$name];
}
/* Store simplified args */
if (! isset($step['args'])) {
continue;
}
foreach ($step['args'] as $key => $arg) {
$result[$idx]['args'][$key] = self::getArg($arg, $step['function']);
}
}
return $result;
}
/**
* Toggles location hiding
*
* @param bool $hide Whether to hide
*/
public function setHideLocation(bool $hide): void
{
$this->hideLocation = $hide;
}
/**
* sets PhpMyAdmin\Error::$_backtrace
*
* We don't store full arguments to avoid wakeup or memory problems.
*
* @param array $backtrace backtrace
*/
public function setBacktrace(array $backtrace): void
{
$this->backtrace = self::processBacktrace($backtrace);
}
/**
* sets PhpMyAdmin\Error::$_line
*
* @param int $line the line
*/
public function setLine(int $line): void
{
$this->line = $line;
}
/**
* sets PhpMyAdmin\Error::$_file
*
* @param string $file the file
*/
public function setFile(string $file): void
{
$this->file = self::relPath($file);
}
/**
* returns unique PhpMyAdmin\Error::$hash, if not exists it will be created
*
* @return string PhpMyAdmin\Error::$hash
*/
public function getHash(): string
{
try {
$backtrace = serialize($this->getBacktrace());
} catch (Throwable $e) {
$backtrace = '';
}
if ($this->hash === null) {
$this->hash = md5(
$this->getNumber() .
$this->getMessage() .
$this->getFile() .
$this->getLine() .
$backtrace
);
}
return $this->hash;
}
/**
* returns PhpMyAdmin\Error::$_backtrace for first $count frames
* pass $count = -1 to get full backtrace.
* The same can be done by not passing $count at all.
*
* @param int $count Number of stack frames.
*
* @return array PhpMyAdmin\Error::$_backtrace
*/
public function getBacktrace(int $count = -1): array
{
if ($count != -1) {
return array_slice($this->backtrace, 0, $count);
}
return $this->backtrace;
}
/**
* returns PhpMyAdmin\Error::$file
*
* @return string PhpMyAdmin\Error::$file
*/
public function getFile(): string
{
return $this->file;
}
/**
* returns PhpMyAdmin\Error::$line
*
* @return int PhpMyAdmin\Error::$line
*/
public function getLine(): int
{
return $this->line;
}
/**
* returns type of error
*
* @return string type of error
*/
public function getType(): string
{
return self::$errortype[$this->getNumber()];
}
/**
* returns level of error
*
* @return string level of error
*/
public function getLevel(): string
{
return self::$errorlevel[$this->getNumber()];
}
/**
* returns title prepared for HTML Title-Tag
*
* @return string HTML escaped and truncated title
*/
public function getHtmlTitle(): string
{
return htmlspecialchars(
mb_substr($this->getTitle(), 0, 100)
);
}
/**
* returns title for error
*/
public function getTitle(): string
{
return $this->getType() . ': ' . $this->getMessage();
}
/**
* Get HTML backtrace
*/
public function getBacktraceDisplay(): string
{
return self::formatBacktrace(
$this->getBacktrace(),
"<br>\n",
"<br>\n"
);
}
/**
* return formatted backtrace field
*
* @param array $backtrace Backtrace data
* @param string $separator Arguments separator to use
* @param string $lines Lines separator to use
*
* @return string formatted backtrace
*/
public static function formatBacktrace(
array $backtrace,
string $separator,
string $lines
): string {
$retval = '';
foreach ($backtrace as $step) {
if (isset($step['file'], $step['line'])) {
$retval .= self::relPath($step['file'])
. '#' . $step['line'] . ': ';
}
if (isset($step['class'])) {
$retval .= $step['class'] . $step['type'];
}
$retval .= self::getFunctionCall($step, $separator);
$retval .= $lines;
}
return $retval;
}
/**
* Formats function call in a backtrace
*
* @param array $step backtrace step
* @param string $separator Arguments separator to use
*/
public static function getFunctionCall(array $step, string $separator): string
{
$retval = $step['function'] . '(';
if (isset($step['args'])) {
if (count($step['args']) > 1) {
$retval .= $separator;
foreach ($step['args'] as $arg) {
$retval .= "\t";
$retval .= $arg;
$retval .= ',' . $separator;
}
} elseif (count($step['args']) > 0) {
foreach ($step['args'] as $arg) {
$retval .= $arg;
}
}
}
return $retval . ')';
}
/**
* Get a single function argument
*
* if $function is one of include/require
* the $arg is converted to a relative path
*
* @param mixed $arg argument to process
* @param string $function function name
*/
public static function getArg($arg, string $function): string
{
$retval = '';
$includeFunctions = [
'include',
'include_once',
'require',
'require_once',
];
$connectFunctions = [
'mysql_connect',
'mysql_pconnect',
'mysqli_connect',
'mysqli_real_connect',
'connect',
'_realConnect',
];
if (in_array($function, $includeFunctions)) {
$retval .= self::relPath($arg);
} elseif (in_array($function, $connectFunctions) && is_string($arg)) {
$retval .= gettype($arg) . ' ********';
} elseif (is_scalar($arg)) {
$retval .= gettype($arg) . ' '
. htmlspecialchars(var_export($arg, true));
} elseif (is_object($arg)) {
$retval .= '<Class:' . get_class($arg) . '>';
} else {
$retval .= gettype($arg);
}
return $retval;
}
/**
* Gets the error as string of HTML
*/
public function getDisplay(): string
{
$this->isDisplayed(true);
$context = 'primary';
$level = $this->getLevel();
if ($level === 'error') {
$context = 'danger';
}
$retval = '<div class="alert alert-' . $context . '" role="alert">';
if (! $this->isUserError()) {
$retval .= '<strong>' . $this->getType() . '</strong>';
$retval .= ' in ' . $this->getFile() . '#' . $this->getLine();
$retval .= "<br>\n";
}
$retval .= $this->getMessage();
if (! $this->isUserError()) {
$retval .= "<br>\n";
$retval .= "<br>\n";
$retval .= "<strong>Backtrace</strong><br>\n";
$retval .= "<br>\n";
$retval .= $this->getBacktraceDisplay();
}
$retval .= '</div>';
return $retval;
}
/**
* whether this error is a user error
*/
public function isUserError(): bool
{
return $this->hideLocation ||
($this->getNumber() & (E_USER_WARNING | E_USER_ERROR | E_USER_NOTICE | E_USER_DEPRECATED));
}
/**
* return short relative path to phpMyAdmin basedir
*
* prevent path disclosure in error message,
* and make users feel safe to submit error reports
*
* @param string $path path to be shorten
*
* @return string shortened path
*/
public static function relPath(string $path): string
{
$dest = @realpath($path);
/* Probably affected by open_basedir */
if ($dest === false) {
return basename($path);
}
$hereParts = explode(
DIRECTORY_SEPARATOR,
(string) realpath(__DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . '..')
);
$destParts = explode(DIRECTORY_SEPARATOR, $dest);
$result = '.';
while (implode(DIRECTORY_SEPARATOR, $destParts) != implode(DIRECTORY_SEPARATOR, $hereParts)) {
if (count($hereParts) > count($destParts)) {
array_pop($hereParts);
$result .= DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . '..';
} else {
array_pop($destParts);
}
}
$path = $result . str_replace(implode(DIRECTORY_SEPARATOR, $destParts), '', $dest);
return str_replace(DIRECTORY_SEPARATOR . PATH_SEPARATOR, DIRECTORY_SEPARATOR, $path);
}
}