PHP: Hyperttext Preprocessore

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PHP:HypertextPreprocessorvar_paq=window._paq=window._paq||[];/*trackermethodslike"setCustomDimension"shouldbecalledbefore"trackPeView"*/_paq.push(["setDoNotTrack",true]);_paq.push(["disableCookies"]);_paq.push(['trackPeView']);_paq.push(['enableLinkTracking']);(function(){varu="//analytics.php.net/";_paq.push(['setTrackerUrl',u+'matomo.php']);_paq.push(['setSiteId','1']);vard=document,g=d.createElement('script'),s=d.getElementsByTName('script')[0];g.async=true;g.src=u+'matomo.js';s.parentNode.insertBefore(g,s);})();DownloadsDocumentationGetInvolvedHelpGettingStarted Introduction AsimpletutorialLangueReference Basicsyntax Types Variables Constants Expressions Operators ControlStructures Functions ClassesandObjects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes ReferencesExplained PredefinedVariables PredefinedExceptions PredefinedInterfacesandClasses PredefinedAttributes Contextoptionsandparameters SupportedProtocolsandWrappersSecurity Introduction Generalconsiderations InstalledasCGIbinary InstalledasanApachemodule SessionSecurity FilesystemSecurity DatabaseSecurity ErrorReporting UserSubmittedData HidingPHP KeepingCurrentFeatures HTTPauthenticationwithPHP Cookies Sessions DealingwithXForms Handlingfileuploads UsingrePHP: Hyperttext Preprocessoremotefiles Connectionhandling PersistentDatabaseConnections Commandlineuse GarbeCollection DTraceDynamicTracingFunctionReference AffectingPHP'sBehiour AudioFormatsManipulation AuthenticationServices CommandLineSpecificExtensions CompressionandArchiveExtensions CryptographyExtensions DatabaseExtensions DateandTimeRelatedExtensPHP: Hyperttext Preprocessoreions FileSystemRelatedExtensions HumanLangueandCharacterEncodingSupport ImeProcessingandGeneration MailRelatedExtensions MathematicalExtensions Non-TextMIMEOutput ProcessControlExtensions OtherBasicExtensions OtherServices SearchEngineExtensions ServerSpecificExtensions SessionExtensions TextProcessing VariableandTypeRelatedExtensions WebServices WindowsOnlyExtensions XMLManipulation GUIExtensionsKeyboardShortcuts?ThishelpjNextmenuitemkPreviousmenuitemgpPreviousmanpegnNextmanpeGScrolltobottomggScrolltotopghGotohomepegsGotosearch(currentpe)/FocussearchboxApopulargeneral-purposescriptinglanguethatisespeciallysuitedtowebdevelopment.Fast,flexibleandprmatic,PHPpowerseverythingfromyourblogtothemostpopularwebsitesintheworld.What'snewin8.3Download8.3.8·Changelog·Upgrading8.2.20·Changelog·Upgrading8.1.29·Changelog·Upgrading06Jun2024PHP8.2.20Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.2.20.Thisisasecurityrelease.AllPHP8.2usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.2.20pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.06Jun2024PHP8.3.8Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.3.8.Thisisasecurityrelease.AllPHP8.3usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.3.8pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.06Jun2024PHP8.1.29Released!ThePHPdevelopmentteamannouncestheimmediateailabilityofPHP8.1.29.Thisisasecurityrelease.AllPHP8.1usersareencouredtoupgradetothisversion.ForsourcedownloadsofPHP8.1.29pleasevisitourdownloadspe,Windowssourceandbinariescanbefoundonwindows.php.net/download/.ThelistofchangesisrecordedintheChangeLog.09May2024PHP8.3.7Released!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,healreadydoneso,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,youcanreadtheNEWSfileortheUPGRADINGfileforacompletelistofupgradingnotPHP: Hyperttext Preprocessorees.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.OlderNewsEntriesThePHPFoundationThePHPFoundationisacollectiveofpeopleandorganizations,unitedinthemissiontoensurethelong-termprosperityofthePHPlangue.DonateConferencescallingforpapersCascadiaPHP2024PHPConPoland2024UpcomingconferencesInternationalPHPConferenceMunich2024ForumPHP2024-Paris(France)CakeFest2024:TheOfficialCakePHPConferenceSymfonyConVienna2024UserGroupEventsSpecialThanksSocialmedia@official_php@php@fosstodon.org©2001-2024ThePHPGroupMyPHP.netContactOtherPHP.netsitesPrivacypolicyViewSource