Functions: Cheat Sheet

224 entries, compact print-friendly format

Functions | AsteriskRecipes.com Cheat Sheet

Name	Syntax	Synopsis	Since
ABS()	`ABS([num])`	Returns absolute value of a number.	16.19.0, 18.5.0
AES_DECRYPT()	`AES_DECRYPT(key,string)`	Decrypt a string encoded in base64 with AES given a 16 character key.	1.6.1.0
AES_ENCRYPT()	`AES_ENCRYPT(key,string)`	Encrypt a string with AES given a 16 character key.	1.6.1.0
AGC()	`AGC(channeldirection)`	Apply automatic gain control to audio on a channel.	1.6.1.0
AGENT()	`AGENT(AgentId[:item])`	Gets information about an Agent	12.0.0
AMI_CLIENT()	`AMI_CLIENT(loginname,field)`	Checks attributes of manager accounts	11.0.0
ARRAY()	`ARRAY(var1[,var2,varN])`	Allows setting multiple variables at once.	1.4.0
AST_CONFIG()	`AST_CONFIG(config_file,category,variable_name[,index])`	Retrieve a variable from a configuration file.	1.6.1.0
AST_SORCERY()	`AST_SORCERY(module_name,object_type,object_id,field_name[,retrieval_method,retrieval_details])`	Get a field from a sorcery object	12.2.0
BASE64_DECODE()	`BASE64_DECODE(string)`	Decode a base64 string.	1.4.0
BASE64_ENCODE()	`BASE64_ENCODE(string)`	Encode a string in base64.	1.4.0
BASENAME()	`BASENAME(filename)`	Return the name of a file.	16.21.0, 18.7.0
BLACKLIST()	`BLACKLIST()`	Check if the callerid is on the blacklist.	1.6.0
CALENDAR_BUSY()	`CALENDAR_BUSY(calendar)`	Determine if the calendar is marked busy at this time.	1.8.0
CALENDAR_EVENT()	`CALENDAR_EVENT(field)`	Get calendar event notification data from a notification call.	1.8.0
CALENDAR_QUERY()	`CALENDAR_QUERY(calendar[,start,end])`	Query a calendar server and store the data on a channel	1.8.0
CALENDAR_QUERY_RESULT()	`CALENDAR_QUERY_RESULT(id,field[,entry])`	Retrieve data from a previously run CALENDAR_QUERY() call	1.8.0
CALENDAR_WRITE()	`CALENDAR_WRITE(calendar,field)`	Write an event to a calendar	1.8.0
CALLCOMPLETION()	`CALLCOMPLETION(option)`	Get or set a call completion configuration parameter for a channel.	1.8.0
CALLERID()	`CALLERID(datatype[,CID])`	Gets or sets Caller*ID data on the channel.	1.2.0
CALLERPRES()	`CALLERPRES()`	Gets or sets Caller*ID presentation on the channel.	N/A
CDR()	`CDR(name[,options])`	Gets or sets a CDR variable.	1.2.0
CDR_PROP()	`CDR_PROP(name)`	Set a property on a channel's CDR.	12.0.0
CHANNEL()	`CHANNEL(item)`	Gets/sets various pieces of information about the channel.	1.2.0
CHANNELS()	`CHANNELS([regular_expression])`	Gets the list of channels, optionally filtering by a regular expression.	1.6.1.0
CHANNEL_EXISTS()	`CHANNEL_EXISTS(name_or_uid)`	Checks if the specified channel exists.	16.22.0, 18.8.0
CHECKSIPDOMAIN()	`CHECKSIPDOMAIN(domain)`	Checks if domain is a local domain.	N/A
CONFBRIDGE()	`CONFBRIDGE(type,option)`	Set a custom dynamic bridge, user, or menu profile on a channel for the ConfBridge application using the same options av...	10.0.0
CONFBRIDGE_CHANNELS()	`CONFBRIDGE_CHANNELS(type,conf)`	Get a list of channels in a ConfBridge conference.	16.27.0, 18.13.0, 19.5.0
CONFBRIDGE_INFO()	`CONFBRIDGE_INFO(type,conf)`	Get information about a ConfBridge conference.	10.0.0
CONNECTEDLINE()	`CONNECTEDLINE(datatype[,i])`	Gets or sets Connected Line data on the channel.	1.8.0
CSV_QUOTE()	`CSV_QUOTE(string)`	Quotes a given string for use in a CSV file, escaping embedded quotes as necessary	1.8.0
CURL()	`CURL(url[,post-data])`	Retrieve content from a remote web or ftp server	10.0.0
CURLOPT()	`CURLOPT([key])`	Sets various options for future invocations of CURL.	10.0.0
CUT()	`CUT(varname,char-delim,range-spec)`	Slices and dices strings, based upon a named delimiter.	1.2.0
DAHDI_CHANNEL()	`DAHDI_CHANNEL(property[,channel])`	Set or get a property of a DAHDI channel.	N/A
DB()	`DB(family/key)`	Read from or write to the Asterisk database.	1.2.0
DB_DELETE()	`DB_DELETE(family/key)`	Return a value from the database and delete it.	1.4.0
DB_EXISTS()	`DB_EXISTS(family/key)`	Check to see if a key exists in the Asterisk database.	1.2.0
DB_KEYCOUNT()	`DB_KEYCOUNT([prefix])`	Obtain the number of keys at a prefix within the Asterisk database.	16.26.0, 18.12.0, 19.4.0
DB_KEYS()	`DB_KEYS([prefix])`	Obtain a list of keys within the Asterisk database.	10.0.0
DEC()	`DEC(variable)`	Decrements the value of a variable, while returning the updated value to the dialplan	1.8.0
DELETE()	`DELETE(varname)`	Deletes a specified channel variable.	18.21.0, 20.6.0, 21.1.0
DENOISE()	`DENOISE(channeldirection)`	Apply noise reduction to audio on a channel.	1.6.1.0
DEVICE_STATE()	`DEVICE_STATE(device)`	Get or Set a device state.	1.6.0
DIALGROUP()	`DIALGROUP(group[,op])`	Manages a group of users for dialing.	1.6.0
DIALPLAN_EXISTS()	`DIALPLAN_EXISTS(context[,extension,priority])`	Checks the existence of a dialplan target.	1.6.0
DIGIT_SUM()	`DIGIT_SUM([num])`	Returns the sum of all the digits in a number.	23.1.0, 22.7.0, 20.17.0
DIRNAME()	`DIRNAME(filename)`	Return the directory of a file.	16.21.0, 18.7.0
DUNDILOOKUP()	`DUNDILOOKUP(number[,context,options])`	Do a DUNDi lookup of a phone number.	1.8.0
DUNDIQUERY()	`DUNDIQUERY(number[,context,options])`	Initiate a DUNDi query.	1.8.0
DUNDIRESULT()	`DUNDIRESULT(id[,resultnum])`	Retrieve results from a DUNDIQUERY.	1.8.0
ENUMLOOKUP()	`ENUMLOOKUP(number[,method-type,options,record#,zone-suffix])`	General or specific querying of NAPTR records for ENUM or ENUM-like DNS pointers.	1.2.0
ENUMQUERY()	`ENUMQUERY(number[,method-type,zone-suffix])`	Initiate an ENUM query.	1.6.0
ENUMRESULT()	`ENUMRESULT(id,resultnum)`	Retrieve results from a ENUMQUERY.	1.6.0
ENV()	`ENV(varname)`	Gets or sets the environment variable specified.	1.2.0
EVAL()	`EVAL(variable)`	Evaluate stored variables	1.2.0
EVAL_EXTEN()	`EVAL_EXTEN(priority[,context,extensions])`	Evaluates the contents of a dialplan extension and returns it as a string.	16.26.0, 18.12.0, 19.4.0
EVAL_SUB()	`EVAL_SUB(priority[,context,extensions])`	Executes a Gosub and provides its return value as a string	20.11.0, 21.6.0, 22.1.0
EXCEPTION()	`EXCEPTION(field)`	Retrieve the details of the current dialplan exception.	1.6.0
EXISTS()	`EXISTS(data)`	Test the existence of a value.	1.2.0
EXPORT()	`EXPORT(channel,var)`	Set variables or dialplan functions on any arbitrary channel that exists.	16.30.0, 18.16.0, 19.8.0, 20.1.0
EXTENSION_STATE()	`EXTENSION_STATE(extension[@context])`	Get an extension's state.	1.6.0
FAXOPT()	`FAXOPT(item)`	Gets/sets various pieces of information about a fax session.	11.0.0
FEATURE()	`FEATURE(option_name)`	Get or set a feature option on a channel.	12.0.0
FEATUREMAP()	`FEATUREMAP(feature_name)`	Get or set a feature map to a given value on a specific channel.	12.0.0
FIELDNUM()	`FIELDNUM(varname,delim,value)`	Return the 1-based offset of a field in a list	10.0.0
FIELDQTY()	`FIELDQTY(varname,delim)`	Count the fields with an arbitrary delimiter	1.2.0
FILE()	`FILE(filename[,offset,length,options,format])`	Read or write text file.	1.6.0
FILE_COUNT_LINE()	`FILE_COUNT_LINE(filename[,format])`	Obtains the number of lines of a text file.	1.8.0
FILE_FORMAT()	`FILE_FORMAT(filename)`	Return the newline format of a text file.	1.8.0
FILTER()	`FILTER(allowed-chars,string)`	Filter the string to include only the allowed characters	1.2.40
FRAME_DROP()	`FRAME_DROP(direction)`	Drops specific frame types in the TX or RX direction on a channel.	16.21.0, 18.7.0
FRAME_TRACE()	`FRAME_TRACE(filter list type)`	View internal ast_frames as they are read and written on a channel.	10.0.0
GEOLOC_PROFILE()	`GEOLOC_PROFILE(parameter[,options])`	Get or Set a field in a geolocation profile	16.28.0, 18.14.0, 19.6.0
GLOBAL()	`GLOBAL(varname)`	Gets or sets the global variable specified.	1.4.0
GLOBAL_DELETE()	`GLOBAL_DELETE(varname)`	Deletes a specified global variable.	18.21.0, 20.6.0, 21.1.0
GLOBAL_EXISTS()	`GLOBAL_EXISTS(varname)`	Check if a global variable exists or not.	18.21.0, 20.6.0, 21.1.0
GROUP()	`GROUP([category])`	Gets or sets the channel group.	1.2.0
GROUP_COUNT()	`GROUP_COUNT([groupname@category])`	Counts the number of channels in the specified group.	1.2.0
GROUP_LIST()	`GROUP_LIST()`	Gets a list of the groups set on a channel.	1.2.0
GROUP_MATCH_COUNT()	`GROUP_MATCH_COUNT(groupmatch[@category])`	Counts the number of channels in the groups matching the specified pattern.	1.2.0
HANGUPCAUSE()	`HANGUPCAUSE(channel,type)`	Gets per-channel hangupcause information from the channel.	11.0.0
HANGUPCAUSE_KEYS()	`HANGUPCAUSE_KEYS()`	Gets the list of channels for which hangup causes are available.	11.0.0
HASH()	`HASH(hashname[,hashkey])`	Implementation of a dialplan associative array	1.6.0
HASHKEYS()	`HASHKEYS(hashname)`	Retrieve the keys of the HASH() function.	1.6.0
HINT()	`HINT(extension[,options])`	Get the devices set for a dialplan hint.	1.6.0
HOLD_INTERCEPT()	`HOLD_INTERCEPT(action)`	Intercepts hold frames on a channel and raises an event instead of passing the frame on	13.7.0
IAXPEER()	`IAXPEER(peername[,item])`	Gets IAX peer information.	1.2.0
IAXVAR()	`IAXVAR(varname)`	Sets or retrieves a remote variable.	1.6.0
ICONV()	`ICONV(in-charset,out-charset,string)`	Converts charsets of strings.	1.6.0
IF()	`IF(expression?retvalue)`	Check for an expression.	1.2.0
IFMODULE()	`IFMODULE(modulename.so)`	Checks if an Asterisk module is loaded in memory.	1.6.0
IFTIME()	`IFTIME(timespec?retvalue)`	Temporal Conditional.	1.2.0
IMPORT()	`IMPORT(channel,variable)`	Retrieve the value of a variable from another channel.	1.6.0
INC()	`INC(variable)`	Increments the value of a variable, while returning the updated value to the dialplan	1.8.0
ISNULL()	`ISNULL(data)`	Check if a value is NULL.	1.2.0
JABBER_RECEIVE()	`JABBER_RECEIVE(account,jid[,timeout])`	Reads XMPP messages.	12.0.0
JABBER_STATUS()	`JABBER_STATUS(account,jid)`	Retrieves a buddy's status.	12.0.0
JITTERBUFFER()	`JITTERBUFFER(jitterbuffer type)`	Add a Jitterbuffer to the Read side of the channel. This dejitters the audio stream before it reaches the Asterisk core....	10.0.0
JSON_DECODE()	`JSON_DECODE(varname,item[,separator,options])`	Returns the string value of a JSON object key from a string containing a JSON array.	16.24.0, 18.10.0, 19.2.0
KEYPADHASH()	`KEYPADHASH(string)`	Hash the letters in string into equivalent keypad numbers.	1.4.0
LEN()	`LEN(string)`	Return the length of the string given.	1.2.0
LISTFILTER()	`LISTFILTER(varname,delim,value)`	Remove an item from a list, by name.	1.6.2.0
LOCAL()	`LOCAL(varname)`	Manage variables local to the gosub stack frame.	1.6.1.0
LOCAL_PEEK()	`LOCAL_PEEK(n,varname)`	Retrieve variables hidden by the local gosub stack frame.	1.6.1.0
LOCK()	`LOCK(lockname)`	Attempt to obtain a named mutex.	1.6.0
LOG_GROUP()	`LOG_GROUP([group])`	Set the channel group name for log filtering on this channel	18.21.0, 20.6.0, 21.1.0
LTRIM()	`LTRIM(string)`	Trim leading whitespace in a string	16.30.0, 18.16.0, 19.8.0, 20.1.0
MAILBOX_EXISTS()	`MAILBOX_EXISTS(mailbox@context)`	Tell if a mailbox is configured.	N/A
MASTER_CHANNEL()	`MASTER_CHANNEL()`	Gets or sets variables on the master channel	1.8.0
MATH()	`MATH(expression[,type])`	Performs Mathematical Functions.	1.2.0
MAX()	`MAX([num1,num2])`	Returns the maximum of two numbers.	16.19.0, 18.5.0
MD5()	`MD5(data)`	Computes an MD5 digest.	1.2.0
MEETME_INFO()	`MEETME_INFO(keyword,confno)`	Query a given conference of various properties.	1.6.1.0
MESSAGE()	`MESSAGE(argument)`	Create a message or read fields from a message.	10.0.0
MESSAGE_DATA()	`MESSAGE_DATA(argument)`	Read or write custom data attached to a message.	10.0.0
MIN()	`MIN([num1,num2])`	Returns the minimum of two numbers.	16.19.0, 18.5.0
MINIVMACCOUNT()	`MINIVMACCOUNT(account:item)`	Gets MiniVoicemail account information.	1.6.0
MINIVMCOUNTER()	`MINIVMCOUNTER(account:name[:operand])`	Reads or sets counters for MiniVoicemail message.	1.6.0
MIXMONITOR()	`MIXMONITOR(id,key)`	Retrieve data pertaining to specific instances of MixMonitor on a channel.	13.0.0
MUTEAUDIO()	`MUTEAUDIO(direction)`	Muting audio streams in the channel	1.8.0
ODBC()	`ODBC(property[,argument])`	Controls ODBC transaction properties.	13.8.0
ODBC_FETCH()	`ODBC_FETCH(result-id)`	Fetch a row from a multirow query.	1.6.0
PARK_GET_CHANNEL()	`PARK_GET_CHANNEL(parking_space,parking_lot)`	Get the channel name of an occupied parking space in a parking lot.	16.0.0
PASSTHRU()	`PASSTHRU([string])`	Pass the given argument back as a value.	1.8.0
PERIODIC_HOOK()	`PERIODIC_HOOK(context,extension,interval,hook_id)`	Execute a periodic dialplan hook into the audio of a call.	13.0.0
PITCH_SHIFT()	`PITCH_SHIFT(channel direction)`	Pitch shift both tx and rx audio streams on a channel.	1.8.0
PJSIP_AOR()	`PJSIP_AOR(name,field)`	Get information about a PJSIP AOR	13.2.0
PJSIP_CONTACT()	`PJSIP_CONTACT(name,field)`	Get information about a PJSIP contact	13.2.0
PJSIP_DIAL_CONTACTS()	`PJSIP_DIAL_CONTACTS(endpoint[,aor,request_user])`	Return a dial string for dialing all contacts on an AOR.	12.0.0
PJSIP_DTMF_MODE()	`PJSIP_DTMF_MODE()`	Get or change the DTMF mode for a SIP call.	13.18.0, 14.7.0, 15.1.0
PJSIP_ENDPOINT()	`PJSIP_ENDPOINT(name,field)`	Get information about a PJSIP endpoint	12.0.0
PJSIP_HEADER()	`PJSIP_HEADER(action,name[,number])`	Gets headers from an inbound PJSIP channel. Adds, updates or removes the specified SIP header from an outbound PJSIP cha...	12.0.0
PJSIP_HEADERS()	`PJSIP_HEADERS([prefix])`	Gets the list of SIP header names from an INVITE message.	16.20.0, 18.6.0
PJSIP_HEADER_PARAM()	`PJSIP_HEADER_PARAM(header_name,parameter_type,parameter_name)`	Get or set header/URI parameters on a PJSIP channel.	18.16.0, 20.1.0
PJSIP_INHERITABLE_HEADER()	`PJSIP_INHERITABLE_HEADER(action,name[,number])`	Adds, updates or removes the specified SIP header from a PJSIP or non-PJSIP channel to be inherited to an outbound PJSIP...	20.19.0, 22.9.0, 23.3.0
PJSIP_MEDIA_OFFER()	`PJSIP_MEDIA_OFFER(media)`	Media and codec offerings to be set on an outbound SIP channel prior to dialing.	12.0.0
PJSIP_MOH_PASSTHROUGH()	`PJSIP_MOH_PASSTHROUGH()`	Get or change the on-hold behavior for a SIP call.	13.30.0, 16.7.0, 17.1.0
PJSIP_PARSE_URI()	`PJSIP_PARSE_URI(uri,type)`	Parse a URI and return a type part of the URI.	13.24.0, 16.1.0
PJSIP_PARSE_URI_FROM()	`PJSIP_PARSE_URI_FROM(uri,type)`	Parse the contents of a variable as a URI and return a type part of the URI.	18.24.0, 20.9.0, 21.4.0
PJSIP_RESPONSE_HEADER()	`PJSIP_RESPONSE_HEADER(action,name[,number])`	Gets headers of 200 response from an outbound PJSIP channel.	16.28.0, 18.14.0, 19.6.0
PJSIP_RESPONSE_HEADERS()	`PJSIP_RESPONSE_HEADERS([prefix])`	Gets the list of SIP header names from the 200 response of INVITE message.	16.28.0, 18.14.0, 19.6.0
PJSIP_SEND_SESSION_REFRESH()	`PJSIP_SEND_SESSION_REFRESH([update_type])`	W/O: Initiate a session refresh via an UPDATE or re-INVITE on an established media session	13.12.0, 14.1.0
PJSIP_TRANSFER_HANDLING()	`PJSIP_TRANSFER_HANDLING([mode])`	Set how transfers are handled for a PJSIP channel.	22.3.0, 21.8.0, 20.13.0
POLARITY()	`POLARITY()`	Set or get the polarity of a DAHDI channel.	16.28.0, 18.14.0, 19.6.0
POP()	`POP(varname[,delimiter])`	Removes and returns the last item off of a variable containing delimited text	1.8.0
PP_EACH_EXTENSION()	`PP_EACH_EXTENSION(mac,template_file)`	Execute specified template for each extension.	1.6.1.0
PP_EACH_USER()	`PP_EACH_USER(string,exclude_mac)`	Generate a string for each phoneprov user.	1.6.0
PRESENCE_STATE()	`PRESENCE_STATE(provider,field[,options])`	Get or Set a presence state.	11.0.0
PUSH()	`PUSH(varname[,delimiter])`	Appends one or more values to the end of a variable containing delimited text	1.8.0
QUEUE_EXISTS()	`QUEUE_EXISTS([queuename])`	Check if a named queue exists on this server	1.8.0
QUEUE_GET_CHANNEL()	`QUEUE_GET_CHANNEL(queuename[,position])`	Return caller at the specified position in a queue.	14.0.0
QUEUE_MEMBER()	`QUEUE_MEMBER(option[,queuename,interface])`	Provides a count of queue members based on the provided criteria, or updates a queue member's settings.	1.6.0
QUEUE_MEMBER_COUNT()	`QUEUE_MEMBER_COUNT(queuename)`	Count number of members answering a queue.	N/A
QUEUE_MEMBER_LIST()	`QUEUE_MEMBER_LIST(queuename)`	Returns a list of interfaces on a queue.	1.4.0
QUEUE_MEMBER_PENALTY()	`QUEUE_MEMBER_PENALTY(queuename,interface)`	Gets or sets queue members penalty.	1.6.0
QUEUE_VARIABLES()	`QUEUE_VARIABLES(queuename)`	Return Queue information in variables.	1.6.0
QUEUE_WAITING_COUNT()	`QUEUE_WAITING_COUNT([queuename])`	Count number of calls currently waiting in a queue.	1.4.0
QUOTE()	`QUOTE(string)`	Quotes a given string, escaping embedded quotes as necessary	1.4.0
RAND()	`RAND([min,max])`	Choose a random number in a range.	1.4.0
REALTIME()	`REALTIME(family,fieldmatch[,matchvalue,delim1\|field,delim2])`	RealTime Read/Write Functions.	1.4.0
REALTIME_DESTROY()	`REALTIME_DESTROY(family,fieldmatch[,matchvalue,delim1,delim2])`	RealTime Destroy Function.	1.6.0
REALTIME_FIELD()	`REALTIME_FIELD(family,fieldmatch,matchvalue,fieldname)`	RealTime query function.	1.6.2.0
REALTIME_HASH()	`REALTIME_HASH(family,fieldmatch,matchvalue)`	RealTime query function.	1.6.2.0
REALTIME_STORE()	`REALTIME_STORE(family,field1,fieldN,field30)`	RealTime Store Function.	1.6.0
RECORDING_INFO()	`RECORDING_INFO(property)`	Retrieve information about a recording previously created using the Record application	N/A
REDIRECTING()	`REDIRECTING(datatype[,i])`	Gets or sets Redirecting data on the channel.	1.8.0
REGEX()	`REGEX("regular expression" string)`	Check string against a regular expression.	1.2.0
REPLACE()	`REPLACE(varname,find-chars[,replace-char])`	Replace a set of characters in a given string with another character.	1.8.0
RTRIM()	`RTRIM(string)`	Trim trailing whitespace in a string	16.30.0, 18.16.0, 19.8.0, 20.1.0
SAYFILES()	`SAYFILES(value[,type])`	Returns the ampersand-delimited file names that would be played by the Say applications (e.g. SayAlpha, SayDigits).	16.21.0, 18.7.0
SCRAMBLE()	`SCRAMBLE([direction])`	Scrambles audio on a channel.	16.21.0, 18.7.0
SET()	`SET(varname[=value])`	SET assigns a value to a channel variable.	1.2.0
SHA1()	`SHA1(data)`	Computes a SHA1 digest.	1.4.0
SHARED()	`SHARED(varname[,channel])`	Gets or sets the shared variable specified.	1.6.0
SHELL()	`SHELL(command)`	Executes a command using the system shell and captures its output.	1.6.0
SHIFT()	`SHIFT(varname[,delimiter])`	Removes and returns the first item off of a variable containing delimited text	1.8.0
SIPPEER()	`SIPPEER(peername,item)`	Gets SIP peer information.	N/A
SIP_HEADER()	`SIP_HEADER(name,number)`	Gets the specified SIP header from an incoming INVITE message.	N/A
SIP_HEADERS()	`SIP_HEADERS(prefix)`	Gets the list of SIP header names from an incoming INVITE message.	N/A
SMDI_MSG()	`SMDI_MSG(message_id,component)`	Retrieve details about an SMDI message.	1.4.19
SMDI_MSG_RETRIEVE()	`SMDI_MSG_RETRIEVE(smdi port,search key[,timeout,options])`	Retrieve an SMDI message.	1.4.19
SORT()	`SORT(keyval[,keyvaln])`	Sorts a list of key/vals into a list of keys, based upon the vals.	1.2.0
SPEECH()	`SPEECH(argument)`	Gets information about speech recognition results.	1.6.1.0
SPEECH_ENGINE()	`SPEECH_ENGINE(name)`	Get or change a speech engine specific attribute.	1.6.1.0
SPEECH_GRAMMAR()	`SPEECH_GRAMMAR(result_number[/nbest_number])`	Gets the matched grammar of a result if available.	1.6.1.0
SPEECH_RESULTS_TYPE()	`SPEECH_RESULTS_TYPE()`	Sets the type of results that will be returned.	1.6.1.0
SPEECH_SCORE()	`SPEECH_SCORE(result_number[/nbest_number])`	Gets the confidence score of a result.	1.6.1.0
SPEECH_TEXT()	`SPEECH_TEXT(result_number[/nbest_number])`	Gets the recognized text of a result.	1.6.1.0
SPRINTF()	`SPRINTF(format,arg1[,arg2,argN])`	Format a variable according to a format string.	1.6.1.0
SQL_ESC()	`SQL_ESC(string)`	Escapes single ticks for use in SQL statements.	1.4.0
SQL_ESC_BACKSLASHES()	`SQL_ESC_BACKSLASHES(string)`	Escapes backslashes for use in SQL statements.	16.26.0, 18.12.0, 19.4.0
SRVQUERY()	`SRVQUERY(service)`	Initiate an SRV query.	1.8.0
SRVRESULT()	`SRVRESULT(id,resultnum[,field])`	Retrieve results from an SRVQUERY.	1.8.0
STACK_PEEK()	`STACK_PEEK(n,which[,suppress])`	View info about the location which called Gosub	1.8.11.0, 10.3.0
STAT()	`STAT(flag,filename)`	Does a check on the specified file.	1.4.0
STIR_SHAKEN()	`STIR_SHAKEN(index[,value])`	Gets the number of STIR/SHAKEN results or a specific STIR/SHAKEN value from a result on the channel.	16.15.0
STIR_SHAKEN_ATTESTATION()	`STIR_SHAKEN_ATTESTATION(field)`	Sets STIR/SHAKEN Attestation parameters on an outgoing channel.	20.17.0, 22.7.0, 23.1.0
STRBETWEEN()	`STRBETWEEN(varname,insert-string)`	Inserts a substring between each character in a string.	16.21.0, 18.7.0
STRFTIME()	`STRFTIME([epoch,timezone,format])`	Returns the current date/time in the specified format.	1.2.0
STRPTIME()	`STRPTIME(datetime,timezone,format)`	Returns the epoch of the arbitrary date/time string structured as described by the format.	1.4.0
STRREPLACE()	`STRREPLACE(varname,find-string[,replace-string,max-replacements])`	Replace instances of a substring within a string with another string.	10.0.0
SYSINFO()	`SYSINFO(parameter)`	Returns system information specified by parameter.	1.6.0
TALK_DETECT()	`TALK_DETECT(action)`	Raises notifications when Asterisk detects silence or talking on a channel.	12.4.0
TESTTIME()	`TESTTIME(date,time[,zone])`	Sets a time to be used with the channel to test logical conditions.	1.8.0
TIMEOUT()	`TIMEOUT(timeouttype)`	Gets or sets timeouts on the channel. Timeout values are in seconds.	1.2.0
TOLOWER()	`TOLOWER(string)`	Convert string to all lowercase letters.	1.6.0
TONE_DETECT()	`TONE_DETECT(freq[,duration_ms,options])`	Asynchronously detects a tone	16.21.0, 18.7.0
TOUPPER()	`TOUPPER(string)`	Convert string to all uppercase letters.	1.6.0
TRIM()	`TRIM(string)`	Trim leading and trailing whitespace in a string	16.30.0, 18.16.0, 19.8.0, 20.1.0
TRYLOCK()	`TRYLOCK(lockname)`	Attempt to obtain a named mutex.	1.6.0
TXTCIDNAME()	`TXTCIDNAME(number[,zone-suffix])`	TXTCIDNAME looks up a caller name via DNS.	1.2.0
UNLOCK()	`UNLOCK(lockname)`	Unlocks a named mutex.	1.6.0
UNSHIFT()	`UNSHIFT(varname[,delimiter])`	Inserts one or more values to the beginning of a variable containing delimited text	1.8.0
URIDECODE()	`URIDECODE(data)`	Decodes a URI-encoded string according to RFC 2396.	1.2.0
URIENCODE()	`URIENCODE(data)`	Encodes a string to URI-safe encoding according to RFC 2396.	1.2.0
UUID()	`UUID()`	Generates an UUID.	N/A
VALID_EXTEN()	`VALID_EXTEN(context,extension,priority)`	Determine whether an extension exists or not.	N/A
VARIABLE_EXISTS()	`VARIABLE_EXISTS(varname)`	Check if a dialplan variable exists or not.	18.21.0, 20.6.0, 21.1.0
VERSION()	`VERSION([info])`	Return the Version info for this Asterisk.	1.6.0
VMCOUNT()	`VMCOUNT(vmbox[,folder])`	Count the voicemails in a specified mailbox or mailboxes.	1.2.0
VM_INFO()	`VM_INFO(mailbox,attribute[,folder])`	Returns the selected attribute from a mailbox.	11.0.0
VOLUME()	`VOLUME(direction[,options])`	Set or get the TX or RX volume of a channel.	1.6.0