How can I load a library in Codeigniter via autoload composer?
This is in fact unrelated to CodeIgniter.
You need to tell composer that you have your own PHP classes that aren't among autoloaded files.
In your composer.json add one of these:
{ // ... "autoload": { "psr-4": { "MyNamespace\\": "src/library/MyNamespace" }, "files": ["src/some/custom/filepath.php"] }}Then run in console update to update autoload.php with your new config:
$ composer updateNow every time you use a class from MyNamespace such as MyNamespace\MyClass it'll look for file src/library/MyNamespace/MyClass.php.
Also, file src/some/custom/filepath.php is always included automatically so you don't need to include it manually. (I don't know what's your usecase).
See for more info: https://getcomposer.org/doc/04-schema.md#autoload
Do you have added it in autoload.php
$autoload['libraries'] = array('pager');