Code Examples -> unserialize -- Creates a PHP value from a stored representation

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PHP Code Examples

Title :	unserialize -- Creates a PHP value from a stored representation
Categories :	PHP, PHP Functions, Variables	documentation group PHP
Date :	Apr 24th 1999
Grade :	Be the 1st to grade this Code Example
Viewed :	2454
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Search :	More code by documentation group PHP
Action :	Grade This Code Example
Tools :	My Examples List

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Description

Description

</H2
><DIV
CLASS="funcsynopsis"
><A
NAME="AEN44407"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>mixed <B
CLASS="function"
>unserialize</B
></CODE
> (string str)</CODE
></P
><P
></P
></DIV
><P
> <B
CLASS="function"
>unserialize()</B
> takes a single serialized
variable (see <A
HREF="get_example.php3?Function=serialize"
><B
CLASS="function"
>serialize()</B
></A
>) and converts it
back into a PHP value. The converted value is returned, and can
be an <SPAN
CLASS="type"
>integer</SPAN
>, <SPAN
CLASS="type"
>double</SPAN
>,
<SPAN
CLASS="type"
>string</SPAN
>, <SPAN
CLASS="type"
>array</SPAN
> or <SPAN
CLASS="type"
>object</SPAN
>.
If an object was serialized, its methods are not preserved in the
returned value.
</P
><P
> <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN44422"
></A
><P
><B
>Example 1. <B
CLASS="function"
>Unserialize()</B
> example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
>// Here, we use unserialize() to load session data from a database
// into $session_data. This example complements the one described
// with <A
HREF="get_example.php3?Function=serialize"
><B
CLASS="function"
>serialize()</B
></A
>.

$conn = odbc_connect ("webdb", ", "chicken");
$stmt = odbc_prepare ($conn, "SELECT data FROM sessions WHERE id = ?");
$sqldata = array ($PHP_AUTH_USER);
if (!odbc_execute ($stmt, &$sqldata) || !odbc_fetch_into ($stmt, &$tmp)) {
// if the execute or fetch fails, initialize to empty array
$session_data = array();
} else {
// we should now have the serialized data in $tmp[0].
$session_data = unserialize ($tmp[0]);
if (!is_array ($session_data)) {
// something went wrong, initialize to empty array
$session_data = array();
}
}
</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
</P
></DIV
>

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