PHP BasicsSyntaxOperatorsVariablesControl StructuresLanguage Constructs and FunctionsNamespacesExtensionsConfigPerformance/bytecode cachingFunctionsArgumentsVariablesReferencesReturnsVariable ScopeAnonymous Functions, closuresType DeclarationsData Format & TypesXML BasicsSimpleXMLXML ExtensionWebservices BasicsSOAPJSONDateTimeDOMDocumentWeb FeaturesSessionsFormsGET and POST dataCookiesHTTP HeadersHTTP AuthenticationHTTP Status CodesObject-Oriented ProgrammingInstantiationModifiers/InheritanceInterfacesReturn TypesAutoloadReflectionType HintingClass ConstantsLate Static BindingMagic (_*) MethodsInstance Methods & PropertiesSPLTraitsSecurityConfigurationSession SecurityCross-Site ScriptingCross-Site Request ForgeriesSQL InjectionRemote Code InjectionEmail InjectionFilter InputEscape OutputEncryption, Hashing algorithmsFile uploadsPHP ConfigurationPassword hashing APII/OFilesReadingWritingFile System FunctionsStreamsContextsStrings & PatternsQuotingMatchingExtractingSearchingReplacingFormattingPCRENOWDOCEncodingsDatabases & SQLSQLJoinsPrepared StatementsTransactionsPDOArraysAssociative ArraysArray IterationArray FunctionsSPL, Objects as arraysCastingError HandlingHandling ExceptionsErrors