polyfill

A window.fetch JavaScript polyfill.

Standard Library

History.js gracefully supports the HTML5 History/State APIs (pushState, replaceState, onPopState) in all browsers. Including continued support for data, titles, replaceState. Supports jQuery, MooTools and Prototype. For HTML5 browsers this means that you can modify the URL directly, without needing to use hashes anymore. For HTML4 browsers it will revert back to using the old onhashchange functionality.

PHP 5.x support for random_bytes() and random_int()

Symfony polyfill for the Mbstring extension

Symfony polyfill for ctype functions

Symfony polyfill for intl's idn_to_ascii and idn_to_utf8 functions

PHP polyfills

Symfony polyfill for intl's ICU-related data and classes

Symfony polyfill backporting some PHP 7.3+ features to lower PHP versions

Symfony polyfill for intl's Normalizer class and related functions

Symfony polyfill for the Iconv extension

Symfony polyfill for intl's grapheme_* functions

Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions