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References with complex arrays (bug #17959)

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@164371 c90b9560-bf6c-de11-be94-00142212c4b1
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Jakub Vrana 2004-07-26 20:53:56 +00:00
parent 3a35f32f02
commit ab4fd0ca34
1 changed files with 27 additions and 1 deletions
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28
language/references.xml
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.30 $ -->
<!-- $Revision: 1.31 $ -->
<chapter id="language.references">
<title>References Explained</title>
@ -117,6 +117,32 @@ echo "var2 is set to '$var2'\n"; // var2 is set to 'Example variable'
to <literal>$var</literal> only changes the local variable's reference.
</para>
</warning>
<warning>
<para>
Complex arrays are sometimes rather copied than referenced. Thus following
example will not work as expected.
<example>
<title>References with complex arrays</title>
<programlisting role="php">
<![CDATA[
<?php
$top = array(
'A' => array(),
'B' => array(
'B_b' => array(),
),
);
$top['A']['parent'] = &$top;
$top['B']['parent'] = &$top;
$top['B']['B_b']['data'] = 'test';
print_r($top['A']['parent']['B']['B_b']); // array()
?>
]]>
</programlisting>
</example>
</para>
</warning>
<para>
The second thing references do is to pass variables
by-reference. This is done by making a local variable in a function and