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

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

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>Cap. 11. Control Structures</TD
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><A
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><B
CLASS="function"
>require_once()</B
></A
></A
></H1
><P
>&#13;    The <A
HREF="function.require-once.html"
><B
CLASS="function"
>require_once()</B
></A
> statement includes and evaluates
    the specified file during the execution of the script.
    This is a behavior similar to the <A
HREF="function.require.html"
><B
CLASS="function"
>require()</B
></A
> statement,
    with the only difference being that if the code from a file has already
    been included, it will not be included again.  See the documentation for
    <A
HREF="function.require.html"
><B
CLASS="function"
>require()</B
></A
> for more information on how this statement 
    works.
   </P
><P
>&#13;    <A
HREF="function.require-once.html"
><B
CLASS="function"
>require_once()</B
></A
> should be used in cases where
    the same file might be included and evaluated more than once during a
    particular execution of a script, and you want to be sure that it is
    included exactly once to avoid problems with function redefinitions,
    variable value reassignments, etc.
   </P
><P
>&#13;     For examples on using <A
HREF="function.require-once.html"
><B
CLASS="function"
>require_once()</B
></A
> and
     <A
HREF="function.include-once.html"
><B
CLASS="function"
>include_once()</B
></A
>, look at the 
     <A
HREF="http://pear.php.net/"
TARGET="_top"
>PEAR</A
> code included in the 
     latest PHP source code distributions.
   </P
><P
>&#13;    <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Not&#227;: </B
>
      <A
HREF="function.require-once.html"
><B
CLASS="function"
>require_once()</B
></A
> was added in PHP 4.0.1pl2
     </P
></BLOCKQUOTE
></DIV
>
   </P
><P
>&#13;    <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Not&#227;: </B
>
      Be aware, that the behaviour of <A
HREF="function.require-once.html"
><B
CLASS="function"
>require_once()</B
></A
>
      and <A
HREF="function.include-once.html"
><B
CLASS="function"
>include_once()</B
></A
> may not be what you expect
      on a non case sensitive operating system (such as Windows).
      <TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN2909"
></A
><P
><B
>Exemplu 11-8. <A
HREF="function.require-once.html"
><B
CLASS="function"
>require_once()</B
></A
> is case insensitive on Windows</B
></P
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#007700">require_once(</font><font color="#DD0000">"a.php"</font><font color="#007700">); </font><font color="#FF8000">// this will include a.php<br /></font><font color="#007700">require_once(</font><font color="#DD0000">"A.php"</font><font color="#007700">); </font><font color="#FF8000">// this will include a.php again on Windows!<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
     </P
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>
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>Avertisment</B
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><P
>Windows
versions of <VAR
CLASS="literal"
>PHP</VAR
> prior to PHP 4.3 do not
support accessing remote files via this function, even if
<A
HREF="ref.filesystem.html#ini.allow-url-fopen"
>allow_url_fopen</A
> is enabled.
</P
></TD
></TR
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></DIV
><P
>&#13;    See also <A
HREF="function.require.html"
><B
CLASS="function"
>require()</B
></A
>,
    <A
HREF="function.include.html"
><B
CLASS="function"
>include()</B
></A
>, <A
HREF="function.include-once.html"
><B
CLASS="function"
>include_once()</B
></A
>,
    <A
HREF="function.get-required-files.html"
><B
CLASS="function"
>get_required_files()</B
></A
>,
    <A
HREF="function.get-included-files.html"
><B
CLASS="function"
>get_included_files()</B
></A
>, <A
HREF="function.readfile.html"
><B
CLASS="function"
>readfile()</B
></A
>, and 
    <A
HREF="function.virtual.html"
><B
CLASS="function"
>virtual()</B
></A
>.
   </P
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