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--- uphp:functions:call_user_func [2017/02/18 12:47]
jeff created
+++ uphp:functions:call_user_func [2017/04/06 14:54]
jeff
@@ Line 1: / Line 1: @@
-======call_user_function======
+======call_user_func======
-<badge>WMPRO, WMMINI FW > 1.0</badge> <badge>WMMEGA FW > 2.0</badge>
+<badge>WMPRO, WMMINI FW >= 1.0</badge> <badge>WMMEGA FW >= 2.0</badge>
 Call a user defined function with optional parameters
 ====Description====
-<well size="sm"><html><span style="font-size:125%;color:green;">mixed <span style="color:black;"></html>[[call_user_function]]<html> ( <span style="color:green;">string <span style="color:blue;">$function_name <span style="color:black;">[, <span style="color:green;">mixed <span style="color:blue;">$parameters <span style="color:black;">... ] )</html></well>
+<well size="sm">
+<html>
+<span style="font-size:125%;color:green">mixed
+<span style="color:black">
+</html>
+[[call_user_func]] (
+<html>
+<span style="color:green">string
+<span style="color:blue">$function_name
+<span style="color:black">[,
+<span style="color:green">mixed
+<span style="color:blue">$parameters
+<span style="color:black">... ] )
+</html>
+</well>
 Return result as defined by the user function
 ====Parameters====
-<html><span style="color:blue;"><b>function_name</b><span style="color:black;"></html>: String containing the name of the user function to call
-<html><span style="color:blue;"><b>parameters</b><span style="color:black;"></html>: Optional parameters to pass to the function
+<html><b><span style="color:blue">$function_name<span style="color:black"></b></html>:  <html><b><span style="color:green">String<span style="color:black"></b></html> containing the name of the user function to call
+<html><b><span style="color:blue">$parameters<span style="color:black"></b></html>:  Optional parameter(s) to pass to the function
 ====Return Value====
-The result of the function can be of any type depending on the way the function is defined
+Any type depending on the way the function is defined
 ====Example====
-<code php><?
-function my_add($x,$y) {
-  return $x+$y;
-}
-$result=call_user_func("my_add",1,3);
-print($result); // result is 4
-?></code>
-====Additional Information====
+<code php>
-If called from within a function, the [[uphp:statements:return]] statement immediately ends execution of the current function, and returns its argument as the value of the function call.
+<?
+  function my_add($x,$y) {
+    return $x+$y;
+  }
+  $result=call_user_func("my_add",1,3);
+  print($result); // result is 4
+?>
+</code>
 ====See Also====
+[[function_exists()]] - Check if a function exists (native or custom)
+[[uphp:statements:function]] - Define a function
 [[uphp:statements:return]] - Return program control to the calling module
-[[print()]] - Output data to the current output stream such as a web page or terminal
+====Additional Information====
+User defined functions can take many different forms, and it is not necessary to use [[call_user_func()]] to execute a function unless a direct return value is needed.
+If used within a function, the [[uphp:statements:return]] statement immediately ends execution of the function, and returns its argument as the value of the function call.

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