ID: 18480
Updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
Status: Open
Bug Type: Documentation problem
Operating System: all
PHP Version: 4.2.1
New Comment:
I really don't understand why this point would have confused you. The
only variables you can access inside a function are the variables local
to that specific function. If you want to access a variable defined
outside of the function (ie. a global) you have to specify you want to
access that global variable. There is no way for a function to access
another function's locally scoped variables.
Previous Comments:
------------------------------------------------------------------------
[2002-07-22 19:00:11] [EMAIL PROTECTED]
For me, the fact that it was needed to create a global variable in one
function to access to in another was not clear. Specially because it's
not the case for vars that are outside any function. I don't think it's
something evident.
My patch probably doesn't explain it well, I'll try to make one more
clear tomorrow (yup, it's damn too late here).
------------------------------------------------------------------------
[2002-07-22 18:54:14] [EMAIL PROTECTED]
That's not a different use though. You are simply creating a global
variable in one function and accessing it in another. I don't think
this patch clarifies anything. Perhaps the fact that you can create
global variables inside a function is not documented well enough, but a
much simpler documentation fix can take care of that.
------------------------------------------------------------------------
[2002-07-22 18:47:58] [EMAIL PROTECTED]
One of the uses of "global $var;" seems not to be documented. Here's a
tiny patch to fix that.
--beginning--
Index: en/language/variables.xml
===================================================================
RCS file: /repository/phpdoc/en/language/variables.xml,v
retrieving revision 1.52
diff -u -u -r1.52 variables.xml
--- en/language/variables.xml 3 Jul 2002 22:51:23 -0000 1.52
+++ en/language/variables.xml 22 Jul 2002 22:34:16 -0000
@@ -380,6 +380,47 @@
</simpara>
<simpara>
+ Please note that if you want to access in your function to a
variable
+ which is in another function, all that through a global variable,
+ you'll need to declare it as a variable in the two functions.
+ An example, always with our function Sum():
+ </simpara>
+
+ <informalexample>
+ <programlisting role="php">
+<![CDATA[
+<?php
+
+function KeepVariables()
+{
+ global $a, $b;
+
+ $a = 1;
+ $b = 2;
+}
+
+function Sum()
+{
+ global $a, $b;
+
+ $b = $a + $b;
+}
+
+KeepVariables();
+Sum();
+echo $b;
+?>
+]]>
+ </programlisting>
+ </informalexample>
+
+ <simpara>
+ If we hadn't declared <varname>$a</varname> and
<varname>$b</vargame>
+ as globals in the KeepVariables() function, the script would have
+ displayed nothing.
+ </simpara>
+
+ <simpara>
A second way to access variables from the global scope is to use
the special PHP-defined <varname>$GLOBALS</varname> array. The
previous example can be rewritten as:
--end--
If it can be useful, I can also write a french version of it, since I'm
french.
HTH.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=18480&edit=1
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