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php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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>serialize</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN230374"
></A
><P
>    (PHP 3 &#62;= 3.0.5, PHP 4, PHP 5)</P
>serialize&nbsp;--&nbsp;
     Generates a storable representation of a value
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN230377"
></A
><H2
>Description</H2
>string <B
CLASS="methodname"
>serialize</B
> ( mixed value )<BR
></BR
><P
>&#13;     <B
CLASS="function"
>serialize()</B
> returns a string containing a
     byte-stream representation of <CODE
CLASS="parameter"
>value</CODE
> that
     can be stored anywhere.
    </P
><P
>&#13;     This is useful for storing or passing PHP values around without
     losing their type and structure.
    </P
><P
>&#13;    To make the serialized string into a PHP value again, use
    <A
HREF="function.unserialize.html"
><B
CLASS="function"
>unserialize()</B
></A
>.  <B
CLASS="function"
>serialize()</B
>
    handles all types, except the <A
HREF="language.types.resource.html"
><B
CLASS="type"
>resource</B
></A
>-type.
    You can even <B
CLASS="function"
>serialize()</B
> arrays that contain
    references to itself. Circular references inside the array/object you 
    are <B
CLASS="function"
>serialize()</B
>ing will also be stored. Any other 
    reference will be lost.
   </P
><P
>&#13;   When serializing objects, PHP will attempt to call the member function
   <B
CLASS="function"
>__sleep()</B
> prior to serialization. This is to allow the
   object to do any last minute clean-up, etc. prior to being serialized.
   Likewise, when the object is restored using <A
HREF="function.unserialize.html"
><B
CLASS="function"
>unserialize()</B
></A
>
   the <B
CLASS="function"
>__wakeup()</B
> member function is called.
   </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
     This didn't work correctly until 4.0.7.
    </P
></BLOCKQUOTE
></DIV
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
     In PHP 3, object properties will be serialized, but methods are
     lost.  That limitation was removed in PHP 4 as both properties
     and methods are now restored.  Please see the <A
HREF="language.oop.serialization.html"
>Serializing Objects</A
>
     section of <A
HREF="language.oop.html"
>Classes and
     Objects</A
> for more information.
    </P
><P
>&#13;     It is not possible to serialize PHP built-in objects.
    </P
></BLOCKQUOTE
></DIV
><P
>&#13;     <TABLE
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><DIV
CLASS="example"
><A
NAME="AEN230407"
></A
><P
><B
>Exemplo 1. <B
CLASS="function"
>serialize()</B
> example</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">// $session_data contains a multi-dimensional array with session<br />// information for the current user.&nbsp;&nbsp;We use serialize() to store<br />// it in a database at the end of the request.<br /><br /></font><font color="#0000BB">$conn </font><font color="#007700">= </font><font color="#0000BB">odbc_connect</font><font color="#007700">(</font><font color="#DD0000">"webdb"</font><font color="#007700">, </font><font color="#DD0000">"php"</font><font color="#007700">, </font><font color="#DD0000">"chicken"</font><font color="#007700">);<br /></font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">odbc_prepare</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">"UPDATE sessions SET data = ? WHERE id = ?"</font><font color="#007700">);<br /></font><font color="#0000BB">$sqldata </font><font color="#007700">= array (</font><font color="#0000BB">serialize</font><font color="#007700">(</font><font color="#0000BB">$session_data</font><font color="#007700">), </font><font color="#0000BB">$PHP_AUTH_USER</font><font color="#007700">);<br />if (!</font><font color="#0000BB">odbc_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, &amp;</font><font color="#0000BB">$sqldata</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">odbc_prepare</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">"INSERT INTO sessions (id, data) VALUES(?, ?)"</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;if (!</font><font color="#0000BB">odbc_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, &amp;</font><font color="#0000BB">$sqldata</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* Something went wrong.. */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#007700">}<br />}<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
    </P
><P
>&#13;    See Also: <A
HREF="function.unserialize.html"
><B
CLASS="function"
>unserialize()</B
></A
>.
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