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"fix" for #11719. clearifyed references and copies on objects.

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@64870 c90b9560-bf6c-de11-be94-00142212c4b1
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Jan Lehnardt 2001-12-12 21:15:37 +00:00
parent 3747b34a1b
commit 03dfca077e
1 changed files with 9 additions and 7 deletions
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16
language/references.xml
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.20 $ -->
<!-- $Revision: 1.21 $ -->
<chapter id="language.references">
<title>References Explained</title>
@ -55,12 +55,14 @@ $foo =& find_var ($bar);
</para>
<note>
<para>
Unless you use the syntax above, the result of
<literal>$bar = new fooclass()</literal> will not be the same
variable as <literal>$this</literal> in the constructor, meaning
that if you have used reference to <literal>$this</literal> in
the constructor, you should use reference assignment, or you get
two different objects.
Not using the <literal>&</literal> operator causes a copy of
the object. If you use <literal>$this</literal> in the class
it will operate on the current instance of the class. The
assignment without <literal>& </literal>will copy the instance
(i.e. the object) and <literal>$this</literal> will operate on
the copy, which is not always favoured. Mostly you want to have
a single instance to work with, due to performace and memory
consumption issues.
</para>
</note>
<para>