Doctrine Inflector is a small library that can perform string manipulations with regard to uppercase/lowercase and singular/plural forms of words.
PHP version of Google's phone number handling library
Converts a string to a slug. Includes integrations for Symfony, Silex, Laravel, Zend Framework 2, Twig, Nette and Latte.
A PHP string manipulation library with multibyte support
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.
A library for generating random numbers and strings
A comprehensive library for generating differences between two strings in multiple formats (unified, side by side HTML etc). Based on the difflib implementation in Python