Variable handling Funkcje
PHP Manual

serialize

(PHP 4, PHP 5)

serializeGenerates a storable representation of a value

Opis

string serialize ( mixed $value )

Generates a storable representation of a value

This is useful for storing or passing PHP values around without losing their type and structure.

To make the serialized string into a PHP value again, use unserialize().

Parametry

value

The value to be serialized. serialize() handles all types, except the resource-type. You can even serialize() arrays that contain references to itself. Circular references inside the array/object you are serializing will also be stored. Any other reference will be lost.

When serializing objects, PHP will attempt to call the member function __sleep 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 unserialize() the __wakeup member function is called.

Informacja: Object's private members have the class name prepended to the member name; protected members have a '*' prepended to the member name. These prepended values have null bytes on either side.

Zwracane wartości

Returns a string containing a byte-stream representation of value that can be stored anywhere.

Przykłady

Przykład #1 serialize() example

<?php
// $session_data contains a multi-dimensional array with session
// information for the current user.  We use serialize() to store
// it in a database at the end of the request.

$conn odbc_connect("webdb""php""chicken");
$stmt odbc_prepare($conn,
      
"UPDATE sessions SET data = ? WHERE id = ?");
$sqldata = array (serialize($session_data), $_SERVER['PHP_AUTH_USER']);
if (!
odbc_execute($stmt$sqldata)) {
    
$stmt odbc_prepare($conn,
     
"INSERT INTO sessions (id, data) VALUES(?, ?)");
    if (!
odbc_execute($stmt$sqldata)) {
        
/* Something went wrong.. */
    
}
}
?>

Rejestr zmian

Wersja Opis
4.0.7 The object serialization process was fixed.
4.0.0 When serializing an object, methods are not lost anymore. Please see the Serializing Objects for more information.

Notatki

Informacja: It is not possible to serialize PHP built-in objects.

Zobacz też:


Variable handling Funkcje
PHP Manual