Das Asterisk Buch

Setzt eine Variable auf den angegebenen Wert.

Set(Variable=Wert)

Setzt die Variable auf den angegebenen Wert. Beginnt der Name der Variablen mit dem Zeichen _, wird eine einfache Vererbung angenommen (d. h., es wird auf Kanäle vererbt, die von diesem Channel erzeugt werden). Beginnt der Name mit __, wird eine Endlosvererbung angenommen (d. h., es wird auf alle Kind-Kanäle vererbt), siehe „Vererbung von Channel-Variablen“. Variablen sind normalerweise nur innerhalb eines Channels gültig und werden beim Auflegen gelöscht. Mit der Option g setzt man in Asterisk 1.2 eine Variable (nicht eine Funktion!) global; in 1.4 macht man das mithilfe der Funktion GLOBAL().

; die Variable TEST auf "123" setzen:
exten => 123,1,Set(TEST=123)
exten => 123,n,SayDigits(${TEST})

; die globale Variable TEST2 auf "456" setzen:
exten => 123,n,Set(TEST2=456,g)         ; Asterisk 1.2
exten => 123,n,Set(GLOBAL(TEST2)=456)   ; Asterisk 1.4

Asterisk-Versionen: 

————————| 1.2 |————————| 1.4 |————————| 1.6 |————————

Interner Hilfetext zu dieser Applikation in Asterisk 1.4: 

  -= Info about application 'Set' =-

[Synopsis]
Set channel variable(s) or function value(s)

[Description]
  Set(name1=value1|name2=value2|..[|options])
This function can be used to set the value of channel variables or dialplan
functions. It will accept up to 24 name/value pairs. When setting variables,
if the variable name is prefixed with _, the variable will be inherited into
channels created from the current channel. If the variable name is prefixed
with __, the variable will be inherited into channels created from the current
channel and all children channels.
  Options:
    g - Set variable globally instead of on the channel
        (applies only to variables, not functions)


The use of Set to set multiple variables at once and the g flag have both
been deprecated.  Please use multiple Set calls and the GLOBAL() dialplan
function instead.

Differenz des internen Hilfetexts von Asterisk 1.2 zu 1.4: 

--- in Asterisk 1.2
+++ in Asterisk 1.4
@@ -14,3 +14,8 @@
     Options:
       g - Set variable globally instead of on the channel
           (applies only to variables, not functions)
+
+
+  The use of Set to set multiple variables at once and the g flag have both
+  been deprecated.  Please use multiple Set calls and the GLOBAL() dialplan
+  function instead.

Differenz des internen Hilfetexts von Asterisk 1.4 zu 1.6: 

--- in Asterisk 1.4
+++ in Asterisk 1.6
@@ -1,21 +1,23 @@
     -= Info about application 'Set' =-

   [Synopsis]
-  Set channel variable(s) or function value(s)
+  Set channel variable or function value

   [Description]
-    Set(name1=value1|name2=value2|..[|options])
+    Set(name=value)
   This function can be used to set the value of channel variables or dialplan
-  functions. It will accept up to 24 name/value pairs. When setting variables,
-  if the variable name is prefixed with _, the variable will be inherited into
-  channels created from the current channel. If the variable name is prefixed
-  with __, the variable will be inherited into channels created from the current
-  channel and all children channels.
-    Options:
-      g - Set variable globally instead of on the channel
-          (applies only to variables, not functions)
-
-
-  The use of Set to set multiple variables at once and the g flag have both
-  been deprecated.  Please use multiple Set calls and the GLOBAL() dialplan
-  function instead.
+  functions. When setting variables, if the variable name is prefixed with _,
+  the variable will be inherited into channels created from the current
+  channel. If the variable name is prefixed with __, the variable will be
+  inherited into channels created from the current channel and all children
+  channels.
+  Compatibility note: If (and only if), in /etc/asterisk/asterisk.conf, you have a [compat]
+  category, and you have app_set = 1.6 under that, then the behavior of this
+  app changes, and does not strip surrounding quotes from the right hand side
+  as it did previously in 1.4. The app_set = 1.6 is only inserted if 'make samples'
+  is executed, or if users insert this by hand into the asterisk.conf file.
+  /nThe advantages of not stripping out quoting, and not caring about the
+  separator characters (comma and vertical bar) were sufficient to make these
+  changes in 1.6. Confusion about how many backslashes would be needed to properly
+  protect separators and quotes in various database access strings has been greatly
+  reduced by these changes.

Siehe auch. Abschnitt 73, „ImportVar()“, doc/README.variables (1.2) / doc/channelvariables.txt (1.4), Abschnitt 38, „GLOBAL()“