![]() A sleep method will return an array of the values from the object that you want to persist. Note for object you should use magic _sleep and _wakeup methods. ![]() Use serialize to save the state of an object in database (lets take the User class as an example) Next unserialize the data to load the previous state back to the object (methods are not serializer you need to include object class to be able to use it).$_POST = unserialize(base64_decode($_GET)) īasically, when you serialize arrays or objects you simply turn it to a valid string format so that you can easily store them outside of the php script. Just don't abuse serialize because the next guy who comes along will have a maintenance or migration nightmare.Ī good example of serialize() and unserialize() could be like this: $posts = base64_encode(serialize($_POST)) A good place to use it may be a cache file that contains the result of a data intensive operation, for instance. That's not to say serialize() is useless. It also has the added disadvantage of making it messy to search your database based on one of the fields that you've serialized. It makes really difficult to maintain code, code with portability issues, and data that is it more difficult to migrate to other RDMS systems, new schema, etc. ![]() You should always be able to query and modify data in the database without using a third party intermediary tool to manipulate data to be inserted. If you want your application to be portable to other languages, like let's say you find that you want to use Java for some portion of your app that it makes sense to use Java in, serialization will become a pain in the buttocks. Doing this makes data in your database non-portable, difficult to read, and can complicate queries. Serialize can be used that way, but that's missing the point of a relational database and the datatypes inherent in your database engine. ![]() Please! please! please! DO NOT serialize data and place it into your database. Note: Set allowed_classes to false in unserialize for security reasons. In case of PHP/Javascript, JSON is actually the better serialization format: Īgain if you want to get the original array back just use PHP unserialize() function $original_array=unserialize($serialized_array, ) But how do you pass this array to Javascript? Array ( => elem 1 => elem 2 => elem 3 ) You can pass the boolean values true and false easily to Javascript. You can pass the number 1 very easily to Javascript. You can pass the string "foo" very easily to Javascript. PHP and Javascript can only communicate via strings. Take for example this common problem: How do I pass a PHP array to Javascript? There are many other formats though, like JSON or XML. The standard PHP function serialize is just a format to express such a thing, it serializes a data structure into a string representation that's unique to PHP and can be reversed into a PHP object using unserialize. That just means to put the structure into a "lower common denominator" that can be handled by things other than PHP, like databases, text files, sockets. If you want to persist such a complex data structure beyond a single run of a script, you need to serialize it. The maximum depth of properties to preserve when serializing/deserializing.A PHP array or object or other complex data structure cannot be transported or stored or otherwise used outside of a running PHP script.
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