desrosj 3cf6276ed0 Code Modernization: Remove JSON extension workarounds for PHP < 5.6.
The PHP native JSON extension has been bundled and compiled with PHP by default since version 5.2.0. Because the minimum version of PHP required by WordPress is now 5.6.20 (see  and [45058]), JSON extension related polyfills and backwards compatibility code can now be removed.

This change removes code that supported JSON related functionality on older versions of PHP. This includes (but is not limited to) checks that `json_last_error()` exists, checking and setting the `JSON_UNESCAPED_SLASHES` and `JSON_PRETTY_PRINT` constants if not previously defined, and deprecating the `_wp_json_prepare_data()` function (which was 100% workaround code).

Follow up of [46205].

See .
Props jrf, Clorith, pento.
Built from https://develop.svn.wordpress.org/trunk@46206


git-svn-id: http://core.svn.wordpress.org/trunk@46018 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-09-20 20:08:57 +00:00
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