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php-manual-en-4.3.0-2mdk.noarch.rpm

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>Handling of global variables</H1
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>&#13;    While handling of global variables had the focus on to be easy in
    PHP 3 and early versions of PHP 4, the focus has changed to be more
    secure. While in PHP 3 the following example worked fine, in PHP 4 it
    has to be unset($GLOBALS["id"]);. This is only one issue of global
    variable handling. You should always have used $GLOBALS, with
    newer versions of PHP 4 you are forced to do so in most cases.
    Read more on this subject in the <A
HREF="language.references.spot.html#references.global"
>&#13;    <TT
CLASS="literal"
>global</TT
> references section</A
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>Example B-1. Migration of global variables</B
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>&#60;?php
$id = 1;
function test()
{
    global $id;
    unset($id);
}
test();
echo($id); // This will print out 1 in PHP 4
?&#62;</PRE
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