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Inline.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Yaml;
013
014 use Symfony\Component\Yaml\Exception\DumpException;
015 use Symfony\Component\Yaml\Exception\ParseException;
016 use Symfony\Component\Yaml\Tag\TaggedValue;
017
018 /**
019 * Inline implements a YAML parser/dumper for the YAML inline syntax.
020 *
021 * @author Fabien Potencier <fabien@symfony.com>
022 *
023 * @internal
024 */
025 class Inline
026 {
027 const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*+(?:\\\\.[^"\\\\]*+)*+)"|\'([^\']*+(?:\'\'[^\']*+)*+)\')';
028
029 public static $parsedLineNumber = -1;
030 public static $parsedFilename;
031
032 private static $exceptionOnInvalidType = false;
033 private static $objectSupport = false;
034 private static $objectForMap = false;
035 private static $constantSupport = false;
036
037 /**
038 * @param int $flags
039 * @param int|null $parsedLineNumber
040 * @param string|null $parsedFilename
041 */
042 public static function initialize($flags, $parsedLineNumber = null, $parsedFilename = null)
043 {
044 self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
045 self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);
046 self::$objectForMap = (bool) (Yaml::PARSE_OBJECT_FOR_MAP & $flags);
047 self::$constantSupport = (bool) (Yaml::PARSE_CONSTANT & $flags);
048 self::$parsedFilename = $parsedFilename;
049
050 if (null !== $parsedLineNumber) {
051 self::$parsedLineNumber = $parsedLineNumber;
052 }
053 }
054
055 /**
056 * Converts a YAML string to a PHP value.
057 *
058 * @param string $value A YAML string
059 * @param int $flags A bit field of PARSE_* constants to customize the YAML parser behavior
060 * @param array $references Mapping of variable names to values
061 *
062 * @return mixed A PHP value
063 *
064 * @throws ParseException
065 */
066 public static function parse($value, $flags = 0, $references = [])
067 {
068 if (\is_bool($flags)) {
069 @trigger_error('Passing a boolean flag to toggle exception handling is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE flag instead.', \E_USER_DEPRECATED);
070
071 if ($flags) {
072 $flags = Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE;
073 } else {
074 $flags = 0;
075 }
076 }
077
078 if (\func_num_args() >= 3 && !\is_array($references)) {
079 @trigger_error('Passing a boolean flag to toggle object support is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT flag instead.', \E_USER_DEPRECATED);
080
081 if ($references) {
082 $flags |= Yaml::PARSE_OBJECT;
083 }
084
085 if (\func_num_args() >= 4) {
086 @trigger_error('Passing a boolean flag to toggle object for map support is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT_FOR_MAP flag instead.', \E_USER_DEPRECATED);
087
088 if (func_get_arg(3)) {
089 $flags |= Yaml::PARSE_OBJECT_FOR_MAP;
090 }
091 }
092
093 if (\func_num_args() >= 5) {
094 $references = func_get_arg(4);
095 } else {
096 $references = [];
097 }
098 }
099
100 self::initialize($flags);
101
102 $value = trim($value);
103
104 if ('' === $value) {
105 return '';
106 }
107
108 if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
109 $mbEncoding = mb_internal_encoding();
110 mb_internal_encoding('ASCII');
111 }
112
113 try {
114 $i = 0;
115 $tag = self::parseTag($value, $i, $flags);
116 switch ($value[$i]) {
117 case '[':
118 $result = self::parseSequence($value, $flags, $i, $references);
119 ++$i;
120 break;
121 case '{':
122 $result = self::parseMapping($value, $flags, $i, $references);
123 ++$i;
124 break;
125 default:
126 $result = self::parseScalar($value, $flags, null, $i, null === $tag, $references);
127 }
128
129 // some comments are allowed at the end
130 if (preg_replace('/\s*#.*$/A', '', substr($value, $i))) {
131 throw new ParseException(sprintf('Unexpected characters near "%s".', substr($value, $i)), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
132 }
133
134 if (null !== $tag) {
135 return new TaggedValue($tag, $result);
136 }
137
138 return $result;
139 } finally {
140 if (isset($mbEncoding)) {
141 mb_internal_encoding($mbEncoding);
142 }
143 }
144 }
145
146 /**
147 * Dumps a given PHP variable to a YAML string.
148 *
149 * @param mixed $value The PHP variable to convert
150 * @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
151 *
152 * @return string The YAML string representing the PHP value
153 *
154 * @throws DumpException When trying to dump PHP resource
155 */
156 public static function dump($value, $flags = 0)
157 {
158 if (\is_bool($flags)) {
159 @trigger_error('Passing a boolean flag to toggle exception handling is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE flag instead.', \E_USER_DEPRECATED);
160
161 if ($flags) {
162 $flags = Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE;
163 } else {
164 $flags = 0;
165 }
166 }
167
168 if (\func_num_args() >= 3) {
169 @trigger_error('Passing a boolean flag to toggle object support is deprecated since Symfony 3.1 and will be removed in 4.0. Use the Yaml::DUMP_OBJECT flag instead.', \E_USER_DEPRECATED);
170
171 if (func_get_arg(2)) {
172 $flags |= Yaml::DUMP_OBJECT;
173 }
174 }
175
176 switch (true) {
177 case \is_resource($value):
178 if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
179 throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
180 }
181
182 return 'null';
183 case $value instanceof \DateTimeInterface:
184 return $value->format('c');
185 case \is_object($value):
186 if ($value instanceof TaggedValue) {
187 return '!'.$value->getTag().' '.self::dump($value->getValue(), $flags);
188 }
189
190 if (Yaml::DUMP_OBJECT & $flags) {
191 return '!php/object '.self::dump(serialize($value));
192 }
193
194 if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \stdClass || $value instanceof \ArrayObject)) {
195 return self::dumpArray($value, $flags & ~Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE);
196 }
197
198 if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
199 throw new DumpException('Object support when dumping a YAML file has been disabled.');
200 }
201
202 return 'null';
203 case \is_array($value):
204 return self::dumpArray($value, $flags);
205 case null === $value:
206 return 'null';
207 case true === $value:
208 return 'true';
209 case false === $value:
210 return 'false';
211 case ctype_digit($value):
212 return \is_string($value) ? "'$value'" : (int) $value;
213 case is_numeric($value) && false === strpos($value, "\f") && false === strpos($value, "\n") && false === strpos($value, "\r") && false === strpos($value, "\t") && false === strpos($value, "\v"):
214 $locale = setlocale(\LC_NUMERIC, 0);
215 if (false !== $locale) {
216 setlocale(\LC_NUMERIC, 'C');
217 }
218 if (\is_float($value)) {
219 $repr = (string) $value;
220 if (is_infinite($value)) {
221 $repr = str_ireplace('INF', '.Inf', $repr);
222 } elseif (floor($value) == $value && $repr == $value) {
223 // Preserve float data type since storing a whole number will result in integer value.
224 $repr = '!!float '.$repr;
225 }
226 } else {
227 $repr = \is_string($value) ? "'$value'" : (string) $value;
228 }
229 if (false !== $locale) {
230 setlocale(\LC_NUMERIC, $locale);
231 }
232
233 return $repr;
234 case '' == $value:
235 return "''";
236 case self::isBinaryString($value):
237 return '!!binary '.base64_encode($value);
238 case Escaper::requiresDoubleQuoting($value):
239 return Escaper::escapeWithDoubleQuotes($value);
240 case Escaper::requiresSingleQuoting($value):
241 case Parser::preg_match('{^[0-9]+[_0-9]*$}', $value):
242 case Parser::preg_match(self::getHexRegex(), $value):
243 case Parser::preg_match(self::getTimestampRegex(), $value):
244 return Escaper::escapeWithSingleQuotes($value);
245 default:
246 return $value;
247 }
248 }
249
250 /**
251 * Check if given array is hash or just normal indexed array.
252 *
253 * @internal
254 *
255 * @param array|\ArrayObject|\stdClass $value The PHP array or array-like object to check
256 *
257 * @return bool true if value is hash array, false otherwise
258 */
259 public static function isHash($value)
260 {
261 if ($value instanceof \stdClass || $value instanceof \ArrayObject) {
262 return true;
263 }
264
265 $expectedKey = 0;
266
267 foreach ($value as $key => $val) {
268 if ($key !== $expectedKey++) {
269 return true;
270 }
271 }
272
273 return false;
274 }
275
276 /**
277 * Dumps a PHP array to a YAML string.
278 *
279 * @param array $value The PHP array to dump
280 * @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
281 *
282 * @return string The YAML string representing the PHP array
283 */
284 private static function dumpArray($value, $flags)
285 {
286 // array
287 if (($value || Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE & $flags) && !self::isHash($value)) {
288 $output = [];
289 foreach ($value as $val) {
290 $output[] = self::dump($val, $flags);
291 }
292
293 return sprintf('[%s]', implode(', ', $output));
294 }
295
296 // hash
297 $output = [];
298 foreach ($value as $key => $val) {
299 $output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
300 }
301
302 return sprintf('{ %s }', implode(', ', $output));
303 }
304
305 /**
306 * Parses a YAML scalar.
307 *
308 * @param string $scalar
309 * @param int $flags
310 * @param string[] $delimiters
311 * @param int &$i
312 * @param bool $evaluate
313 * @param array $references
314 *
315 * @return string
316 *
317 * @throws ParseException When malformed inline YAML string is parsed
318 *
319 * @internal
320 */
321 public static function parseScalar($scalar, $flags = 0, $delimiters = null, &$i = 0, $evaluate = true, $references = [], $legacyOmittedKeySupport = false)
322 {
323 if (\in_array($scalar[$i], ['"', "'"])) {
324 // quoted scalar
325 $output = self::parseQuotedScalar($scalar, $i);
326
327 if (null !== $delimiters) {
328 $tmp = ltrim(substr($scalar, $i), ' ');
329 if ('' === $tmp) {
330 throw new ParseException(sprintf('Unexpected end of line, expected one of "%s".', implode('', $delimiters)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
331 }
332 if (!\in_array($tmp[0], $delimiters)) {
333 throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
334 }
335 }
336 } else {
337 // "normal" string
338 if (!$delimiters) {
339 $output = substr($scalar, $i);
340 $i += \strlen($output);
341
342 // remove comments
343 if (Parser::preg_match('/[ \t]+#/', $output, $match, \PREG_OFFSET_CAPTURE)) {
344 $output = substr($output, 0, $match[0][1]);
345 }
346 } elseif (Parser::preg_match('/^(.'.($legacyOmittedKeySupport ? '+' : '*').'?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
347 $output = $match[1];
348 $i += \strlen($output);
349 } else {
350 throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $scalar), self::$parsedLineNumber + 1, null, self::$parsedFilename);
351 }
352
353 // a non-quoted string cannot start with @ or ` (reserved) nor with a scalar indicator (| or >)
354 if ($output && ('@' === $output[0] || '`' === $output[0] || '|' === $output[0] || '>' === $output[0])) {
355 throw new ParseException(sprintf('The reserved indicator "%s" cannot start a plain scalar; you need to quote the scalar.', $output[0]), self::$parsedLineNumber + 1, $output, self::$parsedFilename);
356 }
357
358 if ($output && '%' === $output[0]) {
359 @trigger_error(self::getDeprecationMessage(sprintf('Not quoting the scalar "%s" starting with the "%%" indicator character is deprecated since Symfony 3.1 and will throw a ParseException in 4.0.', $output)), \E_USER_DEPRECATED);
360 }
361
362 if ($evaluate) {
363 $output = self::evaluateScalar($output, $flags, $references);
364 }
365 }
366
367 return $output;
368 }
369
370 /**
371 * Parses a YAML quoted scalar.
372 *
373 * @param string $scalar
374 * @param int &$i
375 *
376 * @return string
377 *
378 * @throws ParseException When malformed inline YAML string is parsed
379 */
380 private static function parseQuotedScalar($scalar, &$i)
381 {
382 if (!Parser::preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
383 throw new ParseException(sprintf('Malformed inline YAML string: "%s".', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
384 }
385
386 $output = substr($match[0], 1, \strlen($match[0]) - 2);
387
388 $unescaper = new Unescaper();
389 if ('"' == $scalar[$i]) {
390 $output = $unescaper->unescapeDoubleQuotedString($output);
391 } else {
392 $output = $unescaper->unescapeSingleQuotedString($output);
393 }
394
395 $i += \strlen($match[0]);
396
397 return $output;
398 }
399
400 /**
401 * Parses a YAML sequence.
402 *
403 * @param string $sequence
404 * @param int $flags
405 * @param int &$i
406 * @param array $references
407 *
408 * @return array
409 *
410 * @throws ParseException When malformed inline YAML string is parsed
411 */
412 private static function parseSequence($sequence, $flags, &$i = 0, $references = [])
413 {
414 $output = [];
415 $len = \strlen($sequence);
416 ++$i;
417
418 // [foo, bar, ...]
419 while ($i < $len) {
420 if (']' === $sequence[$i]) {
421 return $output;
422 }
423 if (',' === $sequence[$i] || ' ' === $sequence[$i]) {
424 ++$i;
425
426 continue;
427 }
428
429 $tag = self::parseTag($sequence, $i, $flags);
430 switch ($sequence[$i]) {
431 case '[':
432 // nested sequence
433 $value = self::parseSequence($sequence, $flags, $i, $references);
434 break;
435 case '{':
436 // nested mapping
437 $value = self::parseMapping($sequence, $flags, $i, $references);
438 break;
439 default:
440 $isQuoted = \in_array($sequence[$i], ['"', "'"]);
441 $value = self::parseScalar($sequence, $flags, [',', ']'], $i, null === $tag, $references);
442
443 // the value can be an array if a reference has been resolved to an array var
444 if (\is_string($value) && !$isQuoted && false !== strpos($value, ': ')) {
445 // embedded mapping?
446 try {
447 $pos = 0;
448 $value = self::parseMapping('{'.$value.'}', $flags, $pos, $references);
449 } catch (\InvalidArgumentException $e) {
450 // no, it's not
451 }
452 }
453
454 --$i;
455 }
456
457 if (null !== $tag) {
458 $value = new TaggedValue($tag, $value);
459 }
460
461 $output[] = $value;
462
463 ++$i;
464 }
465
466 throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $sequence), self::$parsedLineNumber + 1, null, self::$parsedFilename);
467 }
468
469 /**
470 * Parses a YAML mapping.
471 *
472 * @param string $mapping
473 * @param int $flags
474 * @param int &$i
475 * @param array $references
476 *
477 * @return array|\stdClass
478 *
479 * @throws ParseException When malformed inline YAML string is parsed
480 */
481 private static function parseMapping($mapping, $flags, &$i = 0, $references = [])
482 {
483 $output = [];
484 $len = \strlen($mapping);
485 ++$i;
486 $allowOverwrite = false;
487
488 // {foo: bar, bar:foo, ...}
489 while ($i < $len) {
490 switch ($mapping[$i]) {
491 case ' ':
492 case ',':
493 ++$i;
494 continue 2;
495 case '}':
496 if (self::$objectForMap) {
497 return (object) $output;
498 }
499
500 return $output;
501 }
502
503 // key
504 $isKeyQuoted = \in_array($mapping[$i], ['"', "'"], true);
505 $key = self::parseScalar($mapping, $flags, [':', ' '], $i, false, [], true);
506
507 if ('!php/const' === $key) {
508 $key .= self::parseScalar($mapping, $flags, [':', ' '], $i, false, [], true);
509 if ('!php/const:' === $key && ':' !== $mapping[$i]) {
510 $key = '';
511 --$i;
512 } else {
513 $key = self::evaluateScalar($key, $flags);
514 }
515 }
516
517 if (':' !== $key && false === $i = strpos($mapping, ':', $i)) {
518 break;
519 }
520
521 if (':' === $key) {
522 @trigger_error(self::getDeprecationMessage('Omitting the key of a mapping is deprecated and will throw a ParseException in 4.0.'), \E_USER_DEPRECATED);
523 }
524
525 if (!$isKeyQuoted) {
526 $evaluatedKey = self::evaluateScalar($key, $flags, $references);
527
528 if ('' !== $key && $evaluatedKey !== $key && !\is_string($evaluatedKey) && !\is_int($evaluatedKey)) {
529 @trigger_error(self::getDeprecationMessage('Implicit casting of incompatible mapping keys to strings is deprecated since Symfony 3.3 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0. Quote your evaluable mapping keys instead.'), \E_USER_DEPRECATED);
530 }
531 }
532
533 if (':' !== $key && !$isKeyQuoted && (!isset($mapping[$i + 1]) || !\in_array($mapping[$i + 1], [' ', ',', '[', ']', '{', '}'], true))) {
534 @trigger_error(self::getDeprecationMessage('Using a colon after an unquoted mapping key that is not followed by an indication character (i.e. " ", ",", "[", "]", "{", "}") is deprecated since Symfony 3.2 and will throw a ParseException in 4.0.'), \E_USER_DEPRECATED);
535 }
536
537 if ('<<' === $key) {
538 $allowOverwrite = true;
539 }
540
541 while ($i < $len) {
542 if (':' === $mapping[$i] || ' ' === $mapping[$i]) {
543 ++$i;
544
545 continue;
546 }
547
548 $tag = self::parseTag($mapping, $i, $flags);
549 switch ($mapping[$i]) {
550 case '[':
551 // nested sequence
552 $value = self::parseSequence($mapping, $flags, $i, $references);
553 // Spec: Keys MUST be unique; first one wins.
554 // Parser cannot abort this mapping earlier, since lines
555 // are processed sequentially.
556 // But overwriting is allowed when a merge node is used in current block.
557 if ('<<' === $key) {
558 foreach ($value as $parsedValue) {
559 $output += $parsedValue;
560 }
561 } elseif ($allowOverwrite || !isset($output[$key])) {
562 if (null !== $tag) {
563 $output[$key] = new TaggedValue($tag, $value);
564 } else {
565 $output[$key] = $value;
566 }
567 } elseif (isset($output[$key])) {
568 @trigger_error(self::getDeprecationMessage(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since Symfony 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key)), \E_USER_DEPRECATED);
569 }
570 break;
571 case '{':
572 // nested mapping
573 $value = self::parseMapping($mapping, $flags, $i, $references);
574 // Spec: Keys MUST be unique; first one wins.
575 // Parser cannot abort this mapping earlier, since lines
576 // are processed sequentially.
577 // But overwriting is allowed when a merge node is used in current block.
578 if ('<<' === $key) {
579 $output += $value;
580 } elseif ($allowOverwrite || !isset($output[$key])) {
581 if (null !== $tag) {
582 $output[$key] = new TaggedValue($tag, $value);
583 } else {
584 $output[$key] = $value;
585 }
586 } elseif (isset($output[$key])) {
587 @trigger_error(self::getDeprecationMessage(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since Symfony 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key)), \E_USER_DEPRECATED);
588 }
589 break;
590 default:
591 $value = self::parseScalar($mapping, $flags, [',', '}'], $i, null === $tag, $references);
592 // Spec: Keys MUST be unique; first one wins.
593 // Parser cannot abort this mapping earlier, since lines
594 // are processed sequentially.
595 // But overwriting is allowed when a merge node is used in current block.
596 if ('<<' === $key) {
597 $output += $value;
598 } elseif ($allowOverwrite || !isset($output[$key])) {
599 if (null !== $tag) {
600 $output[$key] = new TaggedValue($tag, $value);
601 } else {
602 $output[$key] = $value;
603 }
604 } elseif (isset($output[$key])) {
605 @trigger_error(self::getDeprecationMessage(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since Symfony 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key)), \E_USER_DEPRECATED);
606 }
607 --$i;
608 }
609 ++$i;
610
611 continue 2;
612 }
613 }
614
615 throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $mapping), self::$parsedLineNumber + 1, null, self::$parsedFilename);
616 }
617
618 /**
619 * Evaluates scalars and replaces magic values.
620 *
621 * @param string $scalar
622 * @param int $flags
623 * @param array $references
624 *
625 * @return mixed The evaluated YAML string
626 *
627 * @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
628 */
629 private static function evaluateScalar($scalar, $flags, $references = [])
630 {
631 $scalar = trim($scalar);
632 $scalarLower = strtolower($scalar);
633
634 if (0 === strpos($scalar, '*')) {
635 if (false !== $pos = strpos($scalar, '#')) {
636 $value = substr($scalar, 1, $pos - 2);
637 } else {
638 $value = substr($scalar, 1);
639 }
640
641 // an unquoted *
642 if (false === $value || '' === $value) {
643 throw new ParseException('A reference must contain at least one character.', self::$parsedLineNumber + 1, $value, self::$parsedFilename);
644 }
645
646 if (!\array_key_exists($value, $references)) {
647 throw new ParseException(sprintf('Reference "%s" does not exist.', $value), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
648 }
649
650 return $references[$value];
651 }
652
653 switch (true) {
654 case 'null' === $scalarLower:
655 case '' === $scalar:
656 case '~' === $scalar:
657 return null;
658 case 'true' === $scalarLower:
659 return true;
660 case 'false' === $scalarLower:
661 return false;
662 case '!' === $scalar[0]:
663 switch (true) {
664 case 0 === strpos($scalar, '!str'):
665 @trigger_error(self::getDeprecationMessage('Support for the !str tag is deprecated since Symfony 3.4. Use the !!str tag instead.'), \E_USER_DEPRECATED);
666
667 return (string) substr($scalar, 5);
668 case 0 === strpos($scalar, '!!str '):
669 return (string) substr($scalar, 6);
670 case 0 === strpos($scalar, '! '):
671 @trigger_error(self::getDeprecationMessage('Using the non-specific tag "!" is deprecated since Symfony 3.4 as its behavior will change in 4.0. It will force non-evaluating your values in 4.0. Use plain integers or !!float instead.'), \E_USER_DEPRECATED);
672
673 return (int) self::parseScalar(substr($scalar, 2), $flags);
674 case 0 === strpos($scalar, '!php/object:'):
675 if (self::$objectSupport) {
676 @trigger_error(self::getDeprecationMessage('The !php/object: tag to indicate dumped PHP objects is deprecated since Symfony 3.4 and will be removed in 4.0. Use the !php/object (without the colon) tag instead.'), \E_USER_DEPRECATED);
677
678 return unserialize(substr($scalar, 12));
679 }
680
681 if (self::$exceptionOnInvalidType) {
682 throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
683 }
684
685 return null;
686 case 0 === strpos($scalar, '!!php/object:'):
687 if (self::$objectSupport) {
688 @trigger_error(self::getDeprecationMessage('The !!php/object: tag to indicate dumped PHP objects is deprecated since Symfony 3.1 and will be removed in 4.0. Use the !php/object (without the colon) tag instead.'), \E_USER_DEPRECATED);
689
690 return unserialize(substr($scalar, 13));
691 }
692
693 if (self::$exceptionOnInvalidType) {
694 throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
695 }
696
697 return null;
698 case 0 === strpos($scalar, '!php/object'):
699 if (self::$objectSupport) {
700 if (!isset($scalar[12])) {
701 return false;
702 }
703
704 return unserialize(self::parseScalar(substr($scalar, 12)));
705 }
706
707 if (self::$exceptionOnInvalidType) {
708 throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
709 }
710
711 return null;
712 case 0 === strpos($scalar, '!php/const:'):
713 if (self::$constantSupport) {
714 @trigger_error(self::getDeprecationMessage('The !php/const: tag to indicate dumped PHP constants is deprecated since Symfony 3.4 and will be removed in 4.0. Use the !php/const (without the colon) tag instead.'), \E_USER_DEPRECATED);
715
716 if (\defined($const = substr($scalar, 11))) {
717 return \constant($const);
718 }
719
720 throw new ParseException(sprintf('The constant "%s" is not defined.', $const), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
721 }
722 if (self::$exceptionOnInvalidType) {
723 throw new ParseException(sprintf('The string "%s" could not be parsed as a constant. Did you forget to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
724 }
725
726 return null;
727 case 0 === strpos($scalar, '!php/const'):
728 if (self::$constantSupport) {
729 if (!isset($scalar[11])) {
730 return '';
731 }
732
733 $i = 0;
734 if (\defined($const = self::parseScalar(substr($scalar, 11), 0, null, $i, false))) {
735 return \constant($const);
736 }
737
738 throw new ParseException(sprintf('The constant "%s" is not defined.', $const), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
739 }
740 if (self::$exceptionOnInvalidType) {
741 throw new ParseException(sprintf('The string "%s" could not be parsed as a constant. Did you forget to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
742 }
743
744 return null;
745 case 0 === strpos($scalar, '!!float '):
746 return (float) substr($scalar, 8);
747 case 0 === strpos($scalar, '!!binary '):
748 return self::evaluateBinaryScalar(substr($scalar, 9));
749 default:
750 @trigger_error(self::getDeprecationMessage(sprintf('Using the unquoted scalar value "%s" is deprecated since Symfony 3.3 and will be considered as a tagged value in 4.0. You must quote it.', $scalar)), \E_USER_DEPRECATED);
751 }
752
753 // Optimize for returning strings.
754 // no break
755 case '+' === $scalar[0] || '-' === $scalar[0] || '.' === $scalar[0] || is_numeric($scalar[0]):
756 if (Parser::preg_match('{^[+-]?[0-9][0-9_]*$}', $scalar)) {
757 $scalar = str_replace('_', '', (string) $scalar);
758 }
759
760 switch (true) {
761 case ctype_digit($scalar):
762 if (preg_match('/^0[0-7]+$/', $scalar)) {
763 return octdec($scalar);
764 }
765
766 $cast = (int) $scalar;
767
768 return ($scalar === (string) $cast) ? $cast : $scalar;
769 case '-' === $scalar[0] && ctype_digit(substr($scalar, 1)):
770 if (preg_match('/^-0[0-7]+$/', $scalar)) {
771 return -octdec(substr($scalar, 1));
772 }
773
774 $cast = (int) $scalar;
775
776 return ($scalar === (string) $cast) ? $cast : $scalar;
777 case is_numeric($scalar):
778 case Parser::preg_match(self::getHexRegex(), $scalar):
779 $scalar = str_replace('_', '', $scalar);
780
781 return '0x' === $scalar[0].$scalar[1] ? hexdec($scalar) : (float) $scalar;
782 case '.inf' === $scalarLower:
783 case '.nan' === $scalarLower:
784 return -log(0);
785 case '-.inf' === $scalarLower:
786 return log(0);
787 case Parser::preg_match('/^(-|\+)?[0-9][0-9,]*(\.[0-9_]+)?$/', $scalar):
788 case Parser::preg_match('/^(-|\+)?[0-9][0-9_]*(\.[0-9_]+)?$/', $scalar):
789 if (false !== strpos($scalar, ',')) {
790 @trigger_error(self::getDeprecationMessage('Using the comma as a group separator for floats is deprecated since Symfony 3.2 and will be removed in 4.0.'), \E_USER_DEPRECATED);
791 }
792
793 return (float) str_replace([',', '_'], '', $scalar);
794 case Parser::preg_match(self::getTimestampRegex(), $scalar):
795 if (Yaml::PARSE_DATETIME & $flags) {
796 // When no timezone is provided in the parsed date, YAML spec says we must assume UTC.
797 return new \DateTime($scalar, new \DateTimeZone('UTC'));
798 }
799
800 $timeZone = date_default_timezone_get();
801 date_default_timezone_set('UTC');
802 $time = strtotime($scalar);
803 date_default_timezone_set($timeZone);
804
805 return $time;
806 }
807 }
808
809 return (string) $scalar;
810 }
811
812 /**
813 * @param string $value
814 * @param int &$i
815 * @param int $flags
816 *
817 * @return string|null
818 */
819 private static function parseTag($value, &$i, $flags)
820 {
821 if ('!' !== $value[$i]) {
822 return null;
823 }
824
825 $tagLength = strcspn($value, " \t\n", $i + 1);
826 $tag = substr($value, $i + 1, $tagLength);
827
828 $nextOffset = $i + $tagLength + 1;
829 $nextOffset += strspn($value, ' ', $nextOffset);
830
831 // Is followed by a scalar
832 if ((!isset($value[$nextOffset]) || !\in_array($value[$nextOffset], ['[', '{'], true)) && 'tagged' !== $tag) {
833 // Manage non-whitelisted scalars in {@link self::evaluateScalar()}
834 return null;
835 }
836
837 // Built-in tags
838 if ($tag && '!' === $tag[0]) {
839 throw new ParseException(sprintf('The built-in tag "!%s" is not implemented.', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
840 }
841
842 if (Yaml::PARSE_CUSTOM_TAGS & $flags) {
843 $i = $nextOffset;
844
845 return $tag;
846 }
847
848 throw new ParseException(sprintf('Tags support is not enabled. Enable the `Yaml::PARSE_CUSTOM_TAGS` flag to use "!%s".', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
849 }
850
851 /**
852 * @param string $scalar
853 *
854 * @return string
855 *
856 * @internal
857 */
858 public static function evaluateBinaryScalar($scalar)
859 {
860 $parsedBinaryData = self::parseScalar(preg_replace('/\s/', '', $scalar));
861
862 if (0 !== (\strlen($parsedBinaryData) % 4)) {
863 throw new ParseException(sprintf('The normalized base64 encoded data (data without whitespace characters) length must be a multiple of four (%d bytes given).', \strlen($parsedBinaryData)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
864 }
865
866 if (!Parser::preg_match('#^[A-Z0-9+/]+={0,2}$#i', $parsedBinaryData)) {
867 throw new ParseException(sprintf('The base64 encoded data (%s) contains invalid characters.', $parsedBinaryData), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
868 }
869
870 return base64_decode($parsedBinaryData, true);
871 }
872
873 private static function isBinaryString($value)
874 {
875 return !preg_match('//u', $value) || preg_match('/[^\x00\x07-\x0d\x1B\x20-\xff]/', $value);
876 }
877
878 /**
879 * Gets a regex that matches a YAML date.
880 *
881 * @return string The regular expression
882 *
883 * @see http://www.yaml.org/spec/1.2/spec.html#id2761573
884 */
885 private static function getTimestampRegex()
886 {
887 return <<<EOF
888 ~^
889 (?P<year>[0-9][0-9][0-9][0-9])
890 -(?P<month>[0-9][0-9]?)
891 -(?P<day>[0-9][0-9]?)
892 (?:(?:[Tt]|[ \t]+)
893 (?P<hour>[0-9][0-9]?)
894 :(?P<minute>[0-9][0-9])
895 :(?P<second>[0-9][0-9])
896 (?:\.(?P<fraction>[0-9]*))?
897 (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
898 (?::(?P<tz_minute>[0-9][0-9]))?))?)?
899 $~x
900 EOF;
901
902 }
903
904 /**
905 * Gets a regex that matches a YAML number in hexadecimal notation.
906 *
907 * @return string
908 */
909 private static function getHexRegex()
910 {
911 return '~^0x[0-9a-f_]++$~i';
912 }
913
914 private static function getDeprecationMessage($message)
915 {
916 $message = rtrim($message, '.');
917
918 if (null !== self::$parsedFilename) {
919 $message .= ' in '.self::$parsedFilename;
920 }
921
922 if (-1 !== self::$parsedLineNumber) {
923 $message .= ' on line '.(self::$parsedLineNumber + 1);
924 }
925
926 return $message.'.';
927 }
928 }
929