Skip to content

LL: add class InvalidEncodingException and flag VALIDATE_UTF8_ENCODING #91

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
LLyaudet wants to merge 2 commits into
base: main
Choose a base branch
from
Open

LL: add class InvalidEncodingException and flag VALIDATE_UTF8_ENCODING #91

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
b668843
LL: add class InvalidEncodingException and flag VALIDATE_UTF8_ENCODIN…
LLyaudet Feb 13, 2026
c359e25
JsonParser.php correction Octetss -> Octets
LLyaudet Mar 18, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
47 changes: 47 additions & 0 deletions src/Seld/JsonLint/InvalidEncodingException.php
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,47 @@
<?php

/*
* This file is part of the JSON Lint package.
*
* (c) Laurent Lyaudet <laurent.lyaudet@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Seld\JsonLint;

class InvalidEncodingException extends ParsingException
{
/**
* @var array{key: string, line: int}
*/
protected $details;

/**
* @param string $message
* @param string $key
* @phpstan-param array{line: int} $details
*/
public function __construct($message, $key, array $details)
{
$details['key'] = $key;
parent::__construct($message, $details);
}

/**
* @return string
*/
public function getKey()
{
return $this->details['key'];
}

/**
* @phpstan-return array{key: string, line: int}
*/
public function getDetails()
{
return $this->details;
}
}
138 changes: 136 additions & 2 deletions src/Seld/JsonLint/JsonParser.php
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -29,9 +29,10 @@ class JsonParser
{
const DETECT_KEY_CONFLICTS = 1;
const ALLOW_DUPLICATE_KEYS = 2;
const PARSE_TO_ASSOC = 4;
const PARSE_TO_AOC = 4;
const ALLOW_COMMENTS = 8;
const ALLOW_DUPLICATE_KEYS_TO_ARRAY = 16;
const VALIDATE_UTF8_ENCODING = 32;

/** @var Lexer */
private $lexer;
Expand All @@ -43,7 +44,7 @@ class JsonParser
private $flags;
/** @var list<int> */
private $stack;
/** @var list<stdClass|array<mixed>|int|bool|float|string|null> */
/** @var list<stdCla|array<mixed>|int|bool|float|string|null> */
private $vstack; // semantic value stack
/** @var list<array{first_line: int, first_column: int, last_line: int, last_column: int}> */
private $lstack; // location stack
Expand Down Expand Up @@ -184,6 +185,13 @@ class JsonParser
*/
public function lint($input, $flags = 0)
{
if ($flags & self::VALIDATE_UTF8_ENCODING) {
try {
$this->validateUTF8Encoding($input);
} catch (InvalidEncodingException $e) {
return $e;
}
}
try {
$this->parse($input, $flags);
} catch (ParsingException $e) {
Expand Down Expand Up @@ -605,4 +613,130 @@ private function failOnBOM($input)
$this->parseError("BOM detected, make sure your input does not include a Unicode Byte-Order-Mark");
}
}

/**
* @param string $input
* @return void
*/
private function validateUTF8Encoding($input)
{
$iContinuationOctetNeeded = 0;
$iCharacterStartPosition = 0;
$iCurrentLineNumber = 1;
$iOffsetInOctetsFromLineStart = -1;
$iOffsetInCharactersFromLineStart = -1;
for ($i = 0, $iMax = strlen($input); $i < $iMax; ++$i) {
$iCurrentOctet = ord($input[$i]);
$iOffsetInOctetsFromLineStart += 1;
if ($iContinuationOctetNeeded > 0) {
if ($iCurrentOctet < 128 || $iCurrentOctet >= 192) {
throw new InvalidEncodingException(
"Non-UTF8 character found on line "
.$iCurrentLineNumber
."; the octet "
.($iOffsetInOctetsFromLineStart + 1)
.", part of the character "
.($iOffsetInCharactersFromLineStart + 1)
.", has value "
.$iCurrentOctet
." which is not a continuation octet."
." (Sequential positions in octets without line splitting:"
." character start position "
.$iCharacterStartPosition
.", octet position "
.$i
.")",
$iCurrentOctet,
array(
'line' => $iCurrentLineNumber,
'offset_in_octets_from_line_start' => $iOffsetInOctetsFromLineStart,
'offset_in_characters_from_line_start' => $iOffsetInCharactersFromLineStart,
'octet_position' => $i,
'character_start_position' => $iCharacterStartPosition,
)
);
}
--$iContinuationOctetNeeded;
continue;
}

$iCharacterStartPosition = $i;
$iOffsetInCharactersFromLineStart += 1;
if ($iCurrentOctet < 128) { // 0xxxxxxx ASCII
if ($input[$i] === "\n") {
$iCurrentLineNumber += 1;
$iOffsetInOctetsFromLineStart = -1;
$iOffsetInCharactersFromLineStart = -1;
}
continue;
}
if ($iCurrentOctet >= 128 && $iCurrentOctet < 192) {
throw new InvalidEncodingException(
"Non-UTF8 character found on line "
.$iCurrentLineNumber
."; the octet "
.($iOffsetInOctetsFromLineStart + 1)
.", part of the character "
.($iOffsetInCharactersFromLineStart + 1)
.", has value "
.$iCurrentOctet
." which is a continuation octet."
." (Sequential positions in octets without line splitting:"
." character start position "
.$iCharacterStartPosition
.", octet position "
.$i
.")",
$iCurrentOctet,
array(
'line' => $iCurrentLineNumber,
'offset_in_octets_from_line_start' => $iOffsetInOctetsFromLineStart,
'offset_in_characters_from_line_start' => $iOffsetInCharactersFromLineStart,
'octet_position' => $i,
'character_start_position' => $iCharacterStartPosition,
)
);
}
if ($iCurrentOctet >= 192 && $iCurrentOctet < 224) {
// 110xxxxx 10xxxxxx
$iContinuationOctetNeeded = 1;
continue;
}
if ($iCurrentOctet >= 224 && $iCurrentOctet < 240) {
// 1110xxxx 10xxxxxx 10xxxxxx
$iContinuationOctetNeeded = 2;
continue;
}
if ($iCurrentOctet >= 240 && $iCurrentOctet < 248) {
// 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
$iContinuationOctetNeeded = 3;
continue;
}
throw new InvalidEncodingException(
"Non-UTF8 character found on line "
.$iCurrentLineNumber
."; the octet "
.($iOffsetInOctetsFromLineStart + 1)
.", part of the character "
.($iOffsetInCharactersFromLineStart + 1)
.", has value "
.$iCurrentOctet
." which is invalid."
." (Sequential positions in octets without line splitting:"
." character start position "
.$iCharacterStartPosition
.", octet position "
.$i
.")",
$iCurrentOctet,
array(
'line' => $iCurrentLineNumber,
'offset_in_octets_from_line_start' => $iOffsetInOctetsFromLineStart,
'offset_in_characters_from_line_start' => $iOffsetInCharactersFromLineStart,
'octet_position' => $i,
'character_start_position' => $iCharacterStartPosition,
)
);
}
}
}