I've been working on some very large forms lately and I've come to the conclusion that creating a database scheme around them wouldn't be the best option because: • My customers don't need to analyze all form submissions as a whole -- form information is simply used on a per-submission basis (like a job application, for example).. htaccess to define Everytime an undefined class should be instantiated, it'll be called.
Again, thanks for sharing your solution I believe it may be a way that I will go with my code and its certainly a clever use of the base64_encode()/decode() functions.. I haven’t yet tested the two but speed can definitely be a factor in which direction you would want to go.. Thank you for you help!
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I understand that in that case, preventing the data from containing characters suscettible to escaping such as quotes, would be of help, but it’s not a general case.. For instance: $variable = preg_replace(‘| ’|’, “_SINGLEQUOTE_”, $variable); $variable = preg_replace(‘| ’|’, “_DOUBLEQUOTE_”, $variable); $variable = preg_replace(‘| ’|’, “_SEMICOLON_”, $variable); $variable = preg_replace(‘| ’|’, “_COLON_”, $variable); $variable = serialize($variable); The downside to this solution is that it is a lot of work for a similar result and the unserialize function must utilize the same code but in reverse.
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I have a table with a load of rows of serialized arrays that I plan to request and pass it to JavaScript.. • Making updates to these forms would be very costly since it would take quite a bit of time to add and remove DB fields as well as update the HTML form.. Note: unserialize_callback_func directive It's possible to set a callback-function which will be called, if an undefined class should be instantiated during unserializing.. Sometimes code fragments found on the web will work as drop-in but are a poor substitute for understanding.. For that reason, I've been using the serialize() and unserialize() functions often.. To disable this feature just empty this setting Options Any options to be provided to unserialize(), as an associative array.. For example, mysql_real_escape_string() or prepared statements in the case of MySQL.. Also, with the preg_replace solution, you must use a string that will NOT be used in the variable at all or strange results will occur.. The problem is - is it possible to unserialize with JavaScript rather than PHP? Jun 26, 2018 - NodeJS Module for working with PHP serialized data.. Can use this string to recreate the original variable values Using serialize to save an object will save all variables in an object.. If you base64_encode() the serialized string then you will probably obviate escaping regardless of database it since the base64 code table uses only ASCII’s alpha, numeric, + and / characters.. But that doesn’t mean it’s a good solution I think base64_encode() not a good replacement for using your DB’s correct escape procedures for efficiency reasons.. Anyways, I ran into the following error when testing unserialize on some information that I had serialized: Notice: unserialize(): Error at offset 2 of 52 bytes in file.. Object Serialization Serializing objects - objects in sessions returns a string containing a byte-stream representation of any value that can be stored in PHP.. Tool to unserialize data taken from PHP It can parse 'serialize()' output, or even serialized sessions data.. $array_restored_from_db = unserialize(base64_decode($encoded_serialized_string)); It's a great fix to simple problem! You need to escape a serialized string in a manner appropriate for your DB, just as you do for any string.. Warning Do not pass untrusted user input to unserialize() regardless of the options value of allowed_classes.. Install from npm Serialize/unserialize is the FASTEST way to store structured data with PHP, adding json or base64 will result in an enormous loss of performance Daniel Lo Nigro That’s actually incorrect – JSON is faster than serialize/unserialize in recent PHP versions.. Unserialization can result in code being loaded and executed due to object instantiation and autoloading, and a malicious user may be able to exploit this.. Excellent solution This is definitely a good way to go I was thinking of using the preg_replace function to replace any single quotes, double quotes, semi_colons, or colons with a set of characters that is unlikely to be used in the string.. Use a safe, standard data interchange format such as JSON (via and ) if you need to pass serialized data to the user.. The methods in an object will not be saved, only the name of the class In order to be able to an object, the class of that object needs to be defined.. Make sure data is not modified by anyone but you Parameters str The serialized string.. That is, if you have an object of class A and serialize this, you'll get a string that refers to class A and contains all values of variables contained in it.. If the variable being unserialized is an object, after successfully reconstructing the object PHP will automatically attempt to call the member function (if it exists).. • I'd like to revert the information into an array format just like it came in easily.. If this option is defined and unserialize() encounters an object of a class that isn't to be accepted, then the object will be instantiated as __PHP_Incomplete_Class instead.. If you want to be able to unserialize this in another file, an object of class A, the definition of class A must be present in that file first.. If you need to unserialize externally-stored serialized data, consider using for data validation.. In reply to the earlier post about having to include object definitions *before* using unserialize.. Omitting this option is the same as defining it as TRUE: PHP will attempt to instantiate objects of any class.. This can be done for example by storing the class definition of class A in an include file and including this file or making use of the function.. Serializing an array keeps the information in an array format, so to speak, but in one long string.. I agree with Shimon in this, there is no reason why adding that layer of base64 encoding AFTER the serialization occurs, should resolve a problem with the unserialization, unless, and that’s not been specified in here, the serialized data was messed up by some escaping function, encoding conversion, etc, before or after being stored in a database or similar.
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