After moving to PHP 5.6+ FreshRSS#2527
it should not be necessary to have the JSON.php fallback anymore, which
was mainly there due to an obscure licensing issue 6 years ago in Debian
https://wiki.debian.org/qa.debian.org/jsonevil , which broke Ubuntu
13.10 FreshRSS#306

After moving to PHP 5.6+ #2527
it should not be necessary to have the JSON.php fallback anymore, which
was mainly there due to an obscure licensing issue 6 years ago in Debian
https://wiki.debian.org/qa.debian.org/jsonevil , which broke Ubuntu
13.10 #306

Take advantage of FreshRSS#2527
https://www.php.net/manual/en/migration56.new-features.php

* PDO refactor

* Automatic prefix when using the syntax `_tableName`
* Uniformity: MySQL is now PDO::ATTR_EMULATE_PREPARES = false just like SQLite and PostgreSQL, with consequences such as only one statement per query
* Use PDO methods exec(), query(), prepare() + execute() in a more efficient way
* Remove auto-update SQL code for versions older than FreshRSS 1.5 (3 years old)
* The name of the default category is set in PHP instead of in the DB (simplies SQL and allows changing the name according to the FreshRSS language)
* Rename `->bd` to `->pdo` (less of a frenshism, and more informative)
* Fix some requests, which were not compatible with MySQL prepared statements

* Whitespace

* Fix syntax for PostgreSQL sequences

+ MySQL install

* Minor formatting

* Fix lastInsertId for PostgreSQL

* Use PHP 5.6+ const

Take advantage of #2527
https://www.php.net/manual/en/migration56.new-features.php

* A bit of forgotten PHP 5.6 simplification for cURL

* Forgotten $s

* Mini fix custom user config

https://github.com/FreshRSS/FreshRSS/pull/2490/files#r326290346

* More work on install.php but not finished

* install.php working

* More cleaning of PDO in install

* Even more simplification

Take advantage of PDO->exec() to run multiple statements

* Disallow changing the name of the default category

#2522 (comment)

https://github.com/simplepie/simplepie/compare/1.5.3..a72e1dfafe7870affdae3edf0d9a494e4fa31bc6
Follow up of the update to 1.5.3
FreshRSS#2702
Requires PHP 5.6+
FreshRSS#2527 (comment)

https://github.com/simplepie/simplepie/compare/1.5.3..a72e1dfafe7870affdae3edf0d9a494e4fa31bc6
Follow up of the update to 1.5.3
#2702
Requires PHP 5.6+
#2527 (comment)