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Ajax php json decode example10/29/2022 ![]() ![]() So, as a PHP developer you are prepared to decode the POST or GET data strings of an Ajax request properly before transferring such string data to the database! However, what one sometimes may forget is the following: This may in particular lead to classical "Umlaut"-problems for German, French and other languages. If your own classes and methods do not provide data encoded with the expected character set at your PHP/MySQL interface, you may get garbage inside the database. In such situations the following statement would hold : Related settings of the MySQL system (SET NAMES) affect the PHP mysql, mysqli and pdo_mysql interfaces for the control program. You may find situations where the data transfer from the server side PHP-programs into a MySQL database is pre-configured by a (foreign) class controlling the PHP/MySQL interface for a western character set iso-8859-1 instead of utf-8. A simple example where a lack of communication may lead to trouble is the following: And what you have to or should do with the Ajax data may depend on settings others have already performed in classes which are beyond your control. E.g., your classes may be included into programs of others. Instead, you may be forced to combine your PHP classes and methods with programs others have developed. In this article I shall assume that the Ajax response is expected as a JSON object, which we prepare by using the function json_encode() on the PHP side.ĭue to provider restrictions or customer requirements you may not always find such an ideal „utf-8 only“ situation where you can control all components. The same would be true for the Ajax response. If and when all components and interfaces [web pages, Ajax-programs, the web server, files, PHP programs, PHP/MySQL interfaces, MySQL …) are set up for a UTF-8 character encoding you probably will not experience any problems regarding the transfer of POST data to a PHP server by Ajax and further on into a MySQL database via a suitable PHP/MySQL interface. This answer can have a complicated structure and may contain a combination of data from different sources – e.g. As you use Ajax you expect some asynchronous response sent from the PHP sever back at the client. Very often you want to transfer data from a browser client via Ajax to a PHP server and save them after some manipulation into a MariaDB or MySQL database. Ajax and PHP programs run in a more or less complex environment. ![]()
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