My personal list of libraries to solve daily business challenges.
composer parallel install plugin
https://github.com/hirak/prestissimo
Yasumi is an easy PHP Library for calculating national holidays
https://github.com/azuyalabs/yasumi
A simple PHP API extension for DateTime
https://github.com/briannesbitt/Carbon
A time range immutable value object
https://github.com/thephpleague/period
CSV data manipulation made easy in PHP
https://github.com/thephpleague/csv
A robust JSON decoder/encoder with support for schema validation
https://github.com/webmozart/json
Small PHP library to valid email addresses using a number of methods
https://github.com/nojacko/email-validator
File uploads with validation and storage strategies
https://github.com/brandonsavage/Upload
A robust cross-platform utility for normalizing, comparing and modifying file paths
https://github.com/webmozart/path-util
Abstraction for local and remote filesystems
https://github.com/thephpleague/flysystem
An image processing library for PHP
https://github.com/kosinix/grafika
Sort complex structures in PHP with ease
https://github.com/phpextra/sorter
PHP version of Google's phone number handling library
https://github.com/giggsey/libphonenumber-for-php
URI manipulation Library
https://github.com/thephpleague/uri
Library allowing thumbnail, snapshot or PDF generation from a url or a html page. https://github.com/KnpLabs/snappy
A sane interface for php's built in preg_* functions
https://github.com/spatie/regex
VerbalExpressions is a PHP library that helps to construct hard regular expressions.
https://github.com/VerbalExpressions/PHPVerbalExpressions
Simple Encryption in PHP
https://github.com/defuse/php-encryption
A php.ini scanner for best security practices
https://github.com/psecio/iniscan
Library to generate random passwords
https://github.com/hackzilla/password-generator
Mock built-in PHP functions (e.g. time() or rand()) in PHPUnit
https://github.com/php-mock/php-mock-phpunit
Faker is a PHP library that generates fake data for you
https://github.com/fzaninotto/Faker
Reports on slow-running tests in your PHPUnit test suite
https://github.com/johnkary/phpunit-speedtrap
vfsStream is a stream wrapper for a virtual file system
https://github.com/mikey179/vfsStream