מדריך PHP
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הערה:
It' s possible to set a callback-function which will be called, if an undefined class should be instanciated during unserializing. (to prevent getting an incomplete object "__PHP_Incomplete_Class".) Use your php.ini, ini_set() or .htaccess-file to define 'unserialize_callback_func '.
Everytime an undefined class should be instanciated, it 'll be called.
דוגמה 1. unserialize_callback_func example
$serialized_object=' O:1 :"a":1 :{s:5 :"value";s:3 :"100" ;}'; ini_set('unserialize_callback_func' ,'mycallback'); / / set your callback_function function mycallback($classname) {/ / just include a file containing your classdefinition / / you get $classname to figure out which classdefinition is required}
הערה:
דוגמה 2. unserialize() example
/ / Here, we use unserialize() to load session data to the / / $session_data array from the string selected from a database. / / This example complements the one described with serialize(). $conn = odbc_connect ("webdb", "php", "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();}}
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