Document missing functions/methods

Currently, the following internal functions/methods are not yet documented:

• SensitiveParameterValue::__construct()
• SensitiveParameterValue::getValue()
• SensitiveParameterValue::__debugInfo()
• Exception::__wakeup()
• Error::__wakeup()
• DateTimeInterface::__serialize()
• DateTimeInterface::__unserialize()
• DateTime::__serialize()
• DateTime::__unserialize()
• DateTimeImmutable::__serialize()
• DateTimeImmutable::__unserialize()
• DateTimeZone::__serialize()
• DateTimeZone::__unserialize()
• DateTimeZone::__wakeup()
• DateTimeZone::__set_state()
• DateInterval::__serialize()
• DateInterval::__unserialize()
• DateInterval::__wakeup()
• DateInterval::__set_state()
• DatePeriod::__serialize()
• DatePeriod::__unserialize()
• DatePeriod::__wakeup()
• DatePeriod::__set_state()
• DatePeriod::getIterator()
• DOMNode::lookupNamespaceURI()
• DOMImplementation::getFeature() (See #820)
• DOMDocumentFragment::append()
• DOMDocumentFragment::prepend()
• DOMNodeList::getIterator()
• DOMCharacterData::replaceWith()
• DOMCharacterData::remove()
• DOMCharacterData::before()
• DOMCharacterData::after()
• DOMElement::remove()
• DOMElement::before()
• DOMElement::after()
• DOMElement::replaceWith()
• DOMElement::append()
• DOMElement::prepend()
• DOMDocument::adoptNode()
• DOMDocument::append()
• DOMDocument::prepend()
• DOMNamedNodeMap::getIterator()
• _()
• imap_is_open() (#2583)
• IntlBreakIterator::getIterator()
• IntlPartsIterator::getRuleStatus()
• intlgregcal_create_instance()
• intlgregcal_set_gregorian_change()
• intlgregcal_get_gregorian_change()
• intlgregcal_is_leap_year()
• locale_canonicalize()
• ResourceBundle::getIterator()
• Spoofchecker::setRestrictionLevel()
• json_validate()
• mysqli::escape_string()
• mysqli::set_opt()
• oci_lob_save()
• oci_lob_import()
• oci_lob_load()
• oci_lob_read()
• oci_lob_eof()
• oci_lob_tell()
• oci_lob_rewind()
• oci_lob_seek()
• oci_lob_size()
• oci_lob_write()
• oci_lob_append()
• oci_lob_truncate()
• oci_lob_erase()
• oci_lob_flush()
• ocisetbufferinglob()
• ocigetbufferinglob()
• oci_lob_export()
• ocifetchinto()
• oci_free_cursor()
• ocipasswordchange()
• oci_free_collection()
• oci_collection_append()
• oci_collection_element_get()
• oci_collection_assign()
• oci_collection_element_assign()
• oci_collection_size()
• oci_collection_max()
• oci_collection_trim()
• pcntl_wifcontinued()
• pcntl_forkx()
• pg_errormessage()
• pg_exec()
• pg_numrows()
• pg_numfields()
• pg_cmdtuples()
• pg_fieldname()
• pg_fieldsize()
• pg_fieldtype()
• pg_fieldnum()
• pg_result()
• pg_fieldprtlen()
• pg_fieldisnull()
• pg_freeresult()
• pg_getlastoid()
• pg_locreate()
• pg_lounlink()
• pg_loopen()
• pg_loclose()
• pg_loread()
• pg_lowrite()
• pg_loreadall()
• pg_loimport()
• pg_loexport()
• pg_setclientencoding()
• pg_clientencoding()
• PharData::count()
• PharData::getAlias()
• PharData::getPath()
• PharData::getMetadata()
• PharData::getModified()
• PharData::getSignature()
• PharData::getStub()
• PharData::getVersion()
• PharData::hasMetadata()
• PharData::isBuffering()
• PharData::isCompressed()
• PharData::isFileFormat()
• PharData::offsetExists()
• PharData::offsetGet()
• PharData::startBuffering()
• PharData::stopBuffering()
• PharData::apiVersion()
• PharData::canCompress()
• PharData::canWrite()
• PharData::createDefaultStub()
• PharData::getSupportedCompression()
• PharData::getSupportedSignatures()
• PharData::interceptFileFuncs()
• PharData::isValidPharFilename()
• PharData::loadPhar()
• PharData::mapPhar()
• PharData::running()
• PharData::mount()
• PharData::mungServer()
• PharData::unlinkArchive()
• PharData::webPhar()
• posix_sysconf()
• Random\Randomizer::nextFloat()
• Random\Randomizer::getFloat()
• Random\Randomizer::getBytesFromString()
• ReflectionFunctionAbstract::getClosureCalledClass() (#4043)
• ReflectionClass::__clone()
• ReflectionClassConstant::__clone()
• ReflectionParameter::isPromoted() (#4049)
• ReflectionType::__clone()
• ReflectionReference::__clone()
• ReflectionAttribute::__toString()
• ReflectionAttribute::__clone()
• socket_atmark()
• ArrayObject::__serialize()
• ArrayObject::__unserialize()
• ArrayObject::__debugInfo()
• ArrayIterator::__serialize()
• ArrayIterator::__unserialize()
• ArrayIterator::__debugInfo()
• SplFileInfo::__debugInfo()
• SplFileInfo::_bad_state_ex()
• SplDoublyLinkedList::__debugInfo()
• SplDoublyLinkedList::__serialize()
• SplDoublyLinkedList::__unserialize()
• SplFixedArray::__serialize()
• SplFixedArray::__unserialize()
• SplFixedArray::getIterator()
• SplFixedArray::jsonSerialize()
• SplPriorityQueue::__debugInfo()
• SplHeap::__debugInfo()
• RecursiveRegexIterator::accept()
• SplObjectStorage::__serialize()
• SplObjectStorage::__unserialize()
• SplObjectStorage::__debugInfo()
• MultipleIterator::__debugInfo()
• SQLite3::lastExtendedErrorCode()
• SQLite3::enableExtendedResultCodes()
• config_get_hash()
• litespeed_request_headers()
• litespeed_response_headers()
• litespeed_finish_request()