... I send out a list of most interesting libraries and apps in the "PHP" section to about 1100 subscribers.
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Doctrine Inflector is a small library that can perform string manipulations with regard to uppercase/lowercase and singular/plural forms of words.
This component provides binary-safe string functions, using the mbstring extension when available.
Lightweight utilities for string & array manipulation, image handling, safe JSON encoding/decoding, validation, slug or strong password generating etc.
Converts a string to a slug. Includes integrations for Symfony, Silex, Laravel, Zend Framework 2, Twig, Nette and Latte.
PHP version of Google's phone number handling library
A PHP string manipulation library with multibyte support
A language detection library for PHP. Detects the language from a given text string.