PHP: Hypertext Preprocessor

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PHP:HypertextPreprocessorDownloadsDocumentationGetInvolvedHelpGettingStarted Introduction AsimpletutorialLangueReference Basicsyntax Types Variables Constants Expressions Operators ControlStructures Functions ClassesandObjects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes ReferencesExplained PredefinedVariables PredefinedExceptions PredefinedInterfacesandClasses PredefinePHP: Hypertext PreprocessordAttributes Contextoptionsandparameters SupportedProtocolsandWrappersSecurity Introduction Generalconsiderations InstalledasCGIbinary InstalledasanApachemodule SessionSecurity FilesystemSecurity DatabaseSecurity ErrorReporting UserSubmittedData HidingPHP KeepingCurrentFeatures HTTPauthenticationwithPHP Cookies Sessions DealingwithXForms Handlingfileuploads Usingremotefiles Connectionhandling PersistentDatabaseConnections Commandlineuse GarbeCollection DTraceDynamicTracingFunctionReference AffectingPHP'sBehiour AudioFormatsManipulation AuthenticationServices CommandLineSpecificExtensions CompressionandArchiveExtensions CryptographyExtensions DatabaseExtensions DateandTimeRelatedExtensions FileSystemRelatedExtensions HumanLangueandCharacterEncodingSupport ImeProcessingandGeneration PHP: Hypertext PreprocessorMailRelatedExtensions MathematicalExtensions Non-TextMIMEOutput ProcessControlExtensions OtherBasicExtensions OtherServices SearchEngineExtensions ServerSpecificExtensions SessionExtensions TextProcessing VariableandTypeRelatedExtensions WebServices WindowsOnlyExtensions XMLManipulation GUIExtensionsKeyboardShortcuts?ThishelpjNextmenuitemkPreviousmenuitemgpPreviousmanpegnNextmanpeGScrolltobottomggScrolltotopghGotohomepegsGotosearch(currentpe)/FocussearchboxApopulargeneral-purposescriptinglanguethatisespeciallysuitedtowebdevelopment.Fast,flexibleandprmatic,PHPpowerseverythingfromyourblogtothemostpopularwebsitesintheworld.What'snewin8.3Download8.3.7·Changelog·Upgrading8.2.19·Changelog·Upgrading8.1.28·Changelog·Upgrading09May2024PHP8.3.7Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.7.Thisisabugfixrelease.AllPHP8.3usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.3.7pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.09May2024PHP8.2.19Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.19.Thisisabugfixrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.19pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.24Apr2024Statementonglibc/iconvVulnerabilityEDIT2024-04-25:ClarifiedwhenaPHPapplicationisvulnerabletothisbug. Recently,abuginglibcversion2.39andolder(CVE-2024-2961)wasuncovered whereabufferoverflowincharactersetconversionsto theISO-2022-CN-EXTcharactersetcanresultinremotecodeexecution. ThisspecificbufferoverflowinglibcisexploitablethroughPHP,whichexposestheiconvfunctionalityofglibctodocharactersetconversionsviatheiconvextension.AlthoughthebugisexploitableinthecontextofthePHPEngine,thebugisnotinPHP.Itisalsonotdirectlyexploitableremotely.Thebugisexploitable,ifandonlyif,thePHPapplicationcallsiconvfunctionsorfilterswithuser-suppliedcharactersets.Applicationsarenotvulnerableif:Glibcsecurityupdatesfromthedistributionhebeeninstalled.Ortheiconvextensionisnotloaded.Orthevulnerablecharactersethasbeenremovedfromgconv-modules-extra.conf.Ortheapplicationpassesonlyspecificallyallowedcharactersetstoiconv.Moreover,whenusingauser-suppliedcharacterset,itisgoodpracticeforapplicationstoacceptonlyspecificcharsetsthathebeenexplicitlyallowedbytheapplication.Oneexampleofhowthiscanbedoneisbyusinganallow-listandthearray_search()functiontochecktheencodingbeforepassingittoiconv.Forexample:array_search($charset,$allowed_list,true) Therearenumerousreportsonlinewithtitleslike"Mitigatingthe iconvVulnerabilityforPHP(CVE-2024-2961)"or"PHPUnderAttack".These titlesaremisleadingasthisisnotabuginPHPitself. IfyourPHPapplicationisvulnerable,wefirstrecommendtocheckifyourLinuxdistributionhasalreadypublishedpatchedvariantsofglibc.Debian,CentOS,andothers,healPHP: Hypertext Preprocessorreadydoneso,andpleaseupgradeassoonaspossible.Onceanupdateisailableinglibc,updatingthatpackeonyourLinuxmachinewillbeenoughtoalleviatetheissue.YoudonotneedtoupdatePHP,asglibcisadynamicallylinkedlibrary.IfyourLinuxdistributionhasnotpublishedapatchedversionofglibc,thereisnofixforthisissue.However,thereexistsaworkarounddescribedinGLIBC VulnerabilityonServersServingPHPwhichexplainsawayonhowtoremove theproblematiccharactersetfromglibc.Performthisprocedureforevery gconv-modules-extra.conffilethatisailableonyoursystem. PHPusersonWindowsarenotaffected. Therefore,anewversionofPHPwillnotbereleasedforthisvulnerability.12Apr2024PHP8.1.28Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.1.28.Thisisasecurityrelease.AllPHP8.1usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.1.28pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.11Apr2024PHP8.3.6Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.6.Thisisasecurityrelease.AllPHP8.3usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.3.6pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.11Apr2024PHP8.2.18Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.18.Thisisasecurityrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.18pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.14Mar2024PHP8.3.4Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.4.Thisisabugfixrelease.AllPHP8.3usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.3.4pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.14Mar2024PHP8.2.17Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.17.Thisisabugfixrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.17pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.15Feb2024PHP8.2.16Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.16.Thisisabugfixrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.16pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.15Feb2024PHP8.3.3Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.3.Thisisabugfixrelease.AllPHP8.3usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.3.3pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.18Jan2024PHP8.2.15Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.15.Thisisabugfixrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.15pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.18Jan2024PHP8.3.2Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.2.Thisisabugfixrelease.AllPHP8.3usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.3.2pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.21Dec2023PHP8.2.14Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.14.Thisisabugfixrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.14pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.21Dec2023PHP8.1.27Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.1.27.Thisisabugfixrelease.AllPHP8.1usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.1.27pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.21Dec2023PHP8.3.1Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.1.Thisisabugfixrelease.AllPHP8.3usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.3.1pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.23Nov2023PHP8.1.26Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.1.26.Thisisabugfixrelease.AllPHP8.1usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.1.26pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.23Nov2023PHP8.3.0Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.0.ThisreleasemarksthelatestminorreleaseofthePHPlangue.PHP8.3comeswithnumerousimprovementsandnewfeaturessuchas:TypedClassConstantsFetchclassconstantdynamicallysyntaxReadonlyAmendmentsOverrideAttributeNewRandomizermethodRandom\Randomizer::getBytesFromStringNewfunctionjson_validateAndmuchmuchmore...ForsourcedownloadsofPHP8.3.0pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.ThemigrationguideisailableinthePHPManual.Pleaseconsultitforthedetailedlistofnewfeaturesandbackwardincompatiblechanges.Kudostoallthecontributorsandsupporters!23Nov2023PHP8.2.13Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.13.Thisisabugfixrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.13pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.09Nov2023PHP8.3.0RC6ailablefortestingThePHPteamispleasedtoannouncethereleaseofPHP8.3.0,RC6.Thisisthesixthandfinalreleasecandidate,continuingthePHP8.3releasecycle,theroughoutlineofwhichisspecifiedinthePHPWiki.ForsourcedownloadsofPHP8.3.0,RC6pleasevisitthedownloadpe.Pleasecarefullytestthisversionandreportanyissuesfoundinthebugreportingsystem.PleaseDONOTusethisversioninproduction,itisanearlytestversion.Formoreinformationonthenewfeaturesandotherchanges,youcanreadtheNEWSfileortheUPGRADINGfileforacompletelistofupgradingnotes.Thesefilescanalsobefoundinthereleasearchive.Thenextreleasewillbetheproduction-ready,generalailabilityrelease,plannedfor23November2023.ThesignaturesforthereleasecanbefoundinthemanifestorontheQAsite.ThankyouforhelpingusmakePHPbetter.26Oct2023PHP8.1.25Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.1.25.Thisisabugfixrelease.AllPHP8.1usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.1.25pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.26Oct2023PHP8.2.12Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.12.Thisisabugfixrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.12pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.26Oct2023PHP8.3.0RC5ailablefortestingThePHPteamispleasedtoannouncethereleaseofPHP8.3.0,RC5.Thisisthefifthreleasecandidate,continuingthePHP8.3releasecycle,theroughoutlineofwhichisspecifiedinthePHPWiki.ForsourcedownloadsofPHP8.3.0,RC5pleasevisitthedownloadpe.Pleasecarefullytestthisversionandreportanyissuesfoundinthebugreportingsystem.PleaseDONOTusethisversioninproduction,itisanearlytestversion.Formoreinformationonthenewfeaturesandotherchanges,youcanreadtheNEWSfileortheUPGRADINGfileforacompletelistofupgradingnotes.Thesefilescanalsobefoundinthereleasearchive.Thenextreleasewillbethefourthreleasecandidate(RC5),plannedfor26October2023.ThesignaturesforthereleasecanbefoundinthemanifestorontheQAsite.ThankyouforhelpingusmakePHPbetter.12Oct2023PHP8.3.0RC4ailablefortestingThePHPteamispleasedtoannouncethereleaseofPHP8.3.0,RC4.Thisisthefourthreleasecandidate,continuingthePHP8.3releasecycle,theroughoutlineofwhichisspecifiedinthePHPWiki.ForsourcedownloadsofPHP8.3.0,RC4pleasevisitthedownloadpe.Pleasecarefullytestthisversionandreportanyissuesfoundinthebugreportingsystem.PleaseDONOTusethisversioninproduction,itisanearlytestversion.Formoreinformationonthenewfeaturesandotherchanges,youcanreadtheNEWSfileortheUPGRADINGfileforacompletelistofupgradingnotes.Thesefilescanalsobefoundinthereleasearchive.Thenextreleasewillbethefifthreleasecandidate(RC5),plannedfor26October2023.ThesignaturesforthereleasecanbefoundinthemanifestorontheQAsite.ThankyouforhelpingusmakePHPbetter.28Sep2023PHP8.1.24Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.1.24.Thisisabugfixrelease.AllPHP8.1usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.1.24pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.28Sep2023PHP8.3.0RC3ailablefortestingThePHPteamispleasedtoannouncethereleaseofPHP8.3.0,RC3.Thisisthethirdreleasecandidate,continuingthePHP8.3releasecycle,theroughoutlineofwhichisspecifiedinthePHPWiki.ForsourcedownloadsofPHP8.3.0,RC3pleasevisitthedownloadpe.Pleasecarefullytestthisversionandreportanyissuesfoundinthebugreportingsystem.PleaseDONOTusethisversioninproduction,itisanearlytestversion.Formoreinformationonthenewfeaturesandotherchanges,youcanreadtheNEWSfileortheUPGRADINGfileforacompletelistofupgradingnotes.Thesefilescanalsobefoundinthereleasearchive.Thenextreleasewillbethefourthreleasecandidate(RC4),plannedfor12October2023.ThesignaturesforthereleasecanbefoundinthemanifestorontheQAsite.ThankyouforhelpingusmakePHPbetter.OlderNewsEntriesThePHPFoundationThePHPFoundationisacollectiveofpeopleandorganizations,unitedinthemissiontoensurethelong-termprosperityofthePHPlangue.DonateUpcomingconferencesCakeFest2024:TheOfficialCakePHPConferencePHPVelhoOeste2024SymfonyConVienna2024WebSummerCamp2024UserGroupEventsSpecialThanksSocialmedia@official_php@php@fosstodon.org©2001-2024ThePHPGroupMyPHP.netContactOtherPHP.netsitesPrivacypolicyViewSource