About the pecl and Pear Extensions Library

What the hell are these two things? What's the difference?
Are the two extensions written by PHP?
What kind of extensions do we use like Mysql,pdo,curl?

A bit more questions, look at the master patiently answer, thank you

Reply to discussion (solution)

PHP is an open source project, the biggest supporter is Zend Company
What you call an official is Zend's PHP development group.

PHP is open source, so it attracts a lot of software enthusiasts to develop various projects.

PECL is a PHP extension library developed by enthusiasts in C/s + +, but is loosely co-operative and not part of the official PHP sequence, and all maintenance and upgrades are only relevant to developers
Pear is a series of functional code written in PHP, because people do not share the habit of thinking, so there are few users in the country

PHP is an open source project, the biggest supporter is Zend Company
What you call an official is Zend's PHP development group.

PHP is open source, so it attracts a lot of software enthusiasts to develop various projects.

PECL is a PHP extension library developed by enthusiasts in C/s + +, but is loosely co-operative and not part of the official PHP sequence, and all maintenance and upgrades are only relevant to developers
Pear is a series of functional codes written in PHP by the good guys.
Since pear is a class library written by PHP, why install it? Is it okay to include the class file directly with require? It's like using a class that we write ourselves.

I really feel the moderator is omnipotent!

Since pear is a class library written by PHP, why install it?
Good question! Pear after more than 10 years of development, the accumulation of the G-Calculated code, you will not be able to download back to put on your machine
So PHP provides a setup script to install the most recent and stable parts of your machine as you need it.

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