WordPress 5.3 Will Require PHP To Install JSON Extensions

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Since PHP 5.2.0 (2006), by default, PHP native JSON extensions possess been bundled and compiled with PHP. However, there are many PHP installations that perform not really consist of JSON. To make sure a consistent experience of JSON related functions in all supported variations of PHP, the WordPress primary aggregation has generally included a big amount of workarounds, functions, and Polyfill.
In 2011 (WordPress 3.2), WordPress officials tried to remove JSON related compatibility code. However, it is found that a considerable amount of PHP distributions still lack JSON extensions by default, and just erased code can end up being retrieved to make certain compatibility.
In 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wordpress] 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szotar.sztaki.hu]) 5.2, the minimal supported edition of PHP was increased from 5.2.6 to 5.6.20. In the eight years since the last attempt to motivate the use of PHP indigenous JSON extensions, the quantity of distributions that have disabled this extension has been significantly reduced.
Consequently, to operate WordPress 5.3 and afterwards, you must install the JSON extension for PHP.
To prevent compatibility issues, sites that do not really have PHP native JSON extensions enabled will see an mistake message when trying to upgrade to WordPress 5.3. The update will end up being cancelled and the site will remain on the current version (see [46455]). This is certainly to prevent potential compatibility problems on servers running custom made PHP configurations.
Right here is a summary of the changes.
Not really recommended
The following functions and classes will remain in the code base, but will trigger an deprecated warning when used (see [46205]):
Providers? JSON and providers? JSON? Mistake classes and all methods
Wp-includes/class-json.php file
_WP? JSON? Prepare? Data() (private) function
Removed
The following functions and classes have been completely removed from the code base (see [46208] changeset):
Json_encode() function
JSON? Decode() function
_JSON? Decode? Object? Helper() function
JSON? Last? Error? Msg() function
Jsonserializable interface
$WP? JSON global variable
JSON? Pretty? Print constant
JSON? Error? None constant
Invariable
The WP? JSON? Encode() function will remain and is not really designed to end up being discarded at this time. This function includes additional integrity investigations on JSON encoded data and continues to be the favored way to encode data as JSON.

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