Sophie: php-manual-ro-0:20051028-1 noarch

php-manual-ro-20051028-1.noarch.rpm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML
><HEAD
><TITLE
>What References Are Not</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
REL="HOME"
TITLE="Manual PHP"
HREF="index.html"><LINK
REL="UP"
TITLE="References Explained"
HREF="language.references.html"><LINK
REL="PREVIOUS"
TITLE="What References Do"
HREF="language.references.whatdo.html"><LINK
REL="NEXT"
TITLE="Passing by Reference"
HREF="language.references.pass.html"><META
HTTP-EQUIV="Content-type"
CONTENT="text/html; charset=ISO-8859-2"></HEAD
><BODY
CLASS="sect1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>Manual PHP</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="language.references.whatdo.html"
ACCESSKEY="P"
>Înapoi</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Cap. 15. References Explained</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="language.references.pass.html"
ACCESSKEY="N"
>Înainte</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="sect1"
><H1
CLASS="sect1"
><A
NAME="language.references.arent"
>What References Are Not</A
></H1
><P
>&#13;    As said before, references aren't pointers. That means, the
    following construct won't do what you expect:
    <DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN3612"
></A
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#007700">function </font><font color="#0000BB">foo </font><font color="#007700">(&amp;</font><font color="#0000BB">$var</font><font color="#007700">)<br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$var </font><font color="#007700">=&amp; </font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#DD0000">"baz"</font><font color="#007700">];<br />}<br /></font><font color="#0000BB">foo</font><font color="#007700">(</font><font color="#0000BB">$bar</font><font color="#007700">); <br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
></P
></DIV
>
   </P
><P
>&#13;    What happens is that <VAR
CLASS="varname"
>$var</VAR
> in
    <VAR
CLASS="varname"
>foo</VAR
> will be bound with
    <VAR
CLASS="varname"
>$bar</VAR
> in caller, but then it will be
    re-bound with <VAR
CLASS="varname"
>$GLOBALS["baz"]</VAR
>. There's no way
    to bind <VAR
CLASS="varname"
>$bar</VAR
> in the calling scope to something else
    using the reference mechanism, since <VAR
CLASS="varname"
>$bar</VAR
> is not
    available in the function <VAR
CLASS="varname"
>foo</VAR
> (it is represented by
    <VAR
CLASS="varname"
>$var</VAR
>, but <VAR
CLASS="varname"
>$var</VAR
> has only
    variable contents and not name-to-value binding in the calling
    symbol table).
   </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="language.references.whatdo.html"
ACCESSKEY="P"
>Înapoi</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Acas&#227;</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="language.references.pass.html"
ACCESSKEY="N"
>Înainte</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>What References Do</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="language.references.html"
ACCESSKEY="U"
>Sus</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Passing by Reference</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>