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[//]: # (AUTO-GENERATED BY "PHP README Helper": base file -> docs/base.md) [](https://github.com/vshymanskyy/StandWithUkraine/blob/main/docs/README.md) [](https://github.com/voku/portable-utf8/actions) [](https://ci.appveyor.com/project/voku/portable-utf8/branch/master) [](https://app.fossa.io/projects/git%2Bgithub.com%2Fvoku%2Fportable-utf8?ref=badge_shield) [](https://codecov.io/github/voku/portable-utf8?branch=master) [](https://www.codacy.com/app/voku/portable-utf8) [](https://packagist.org/packages/voku/portable-utf8) [](https://packagist.org/packages/voku/portable-utf8) [](https://packagist.org/packages/voku/portable-utf8) [](https://www.paypal.me/moelleken) [](https://www.patreon.com/voku) # 🉑 Portable UTF-8 ## Description It is written in PHP (PHP 7+) and can work without "mbstring", "iconv" or any other extra encoding php-extension on your server. The benefit of Portable UTF-8 is that it is easy to use, easy to bundle. This library will also auto-detect your server environment and will use the installed php-extensions if they are available, so you will have the best possible performance. As a fallback we will use Symfony Polyfills, if needed. (https://github.com/symfony/polyfill) The project based on ... + Hamid Sarfraz's work - [portable-utf8](http://pageconfig.com/attachments/portable-utf8.php) + Nicolas Grekas's work - [tchwork/utf8](https://github.com/tchwork/utf8) + Behat's work - [Behat/Transliterator](https://github.com/Behat/Transliterator) + Sebastián Grignoli's work - [neitanod/forceutf8](https://github.com/neitanod/forceutf8) + Ivan Enderlin's work - [hoaproject/Ustring](https://github.com/hoaproject/Ustring) + and many cherry-picks from "GitHub"-gists and "Stack Overflow"-snippets ... ## Demo Here you can test some basic functions from this library and you can compare some results with the native php function results. + [encoder.suckup.de](https://encoder.suckup.de/) ## Index * [Alternative](#alternative) * [Install](#install-portable-utf-8-via-composer-require) * [Why Portable UTF-8?](#why-portable-utf-8) * [Requirements and Recommendations](#requirements-and-recommendations) * [Warning](#warning) * [Usage](#usage) * [Class methods](#class-methods) * [Unit Test](#unit-test) * [License and Copyright](#license-and-copyright) ## Alternative If you like a more Object Oriented Way to edit strings, then you can take a look at [voku/Stringy](https://github.com/voku/Stringy), it's a fork of "danielstjules/Stringy" but it used the "Portable UTF-8"-Class and some extra methods. ```php // Standard library strtoupper('fòôbàř'); // 'FòôBàř' strlen('fòôbàř'); // 10 // mbstring // WARNING: if you don't use a polyfill like "Portable UTF-8", you need to install the php-extension "mbstring" on your server mb_strtoupper('fòôbàř'); // 'FÒÔBÀŘ' mb_strlen('fòôbàř'); // '6' // Portable UTF-8 use voku\helper\UTF8; UTF8::strtoupper('fòôbàř'); // 'FÒÔBÀŘ' UTF8::strlen('fòôbàř'); // '6' // voku/Stringy use Stringy\Stringy as S; $stringy = S::create('fòôbàř'); $stringy->toUpperCase(); // 'FÒÔBÀŘ' $stringy->length(); // '6' ``` ## Install "Portable UTF-8" via "composer require" ```shell composer require voku/portable-utf8 ``` If your project do not need some of the Symfony polyfills please use the `replace` section of your `composer.json`. This removes any overhead from these polyfills as they are no longer part of your project. e.g.: ```json { "replace": { "symfony/polyfill-php72": "1.99", "symfony/polyfill-iconv": "1.99", "symfony/polyfill-intl-grapheme": "1.99", "symfony/polyfill-intl-normalizer": "1.99", "symfony/polyfill-mbstring": "1.99" } } ``` ## Why Portable UTF-8?[]() PHP 5 and earlier versions have no native Unicode support. To bridge the gap, there exist several extensions like "mbstring", "iconv" and "intl". The problem with "mbstring" and others is that most of the time you cannot ensure presence of a specific one on a server. If you rely on one of these, your application is no more portable. This problem gets even severe for open source applications that have to run on different servers with different configurations. Considering these, I decided to write a library: ## Requirements and Recommendations * No extensions are required to run this library. Portable UTF-8 only needs PCRE library that is available by default since PHP 4.2.0 and cannot be disabled since PHP 5.3.0. "\u" modifier support in PCRE for UTF-8 handling is not a must. * PHP 5.3 is the minimum requirement, and all later versions are fine with Portable UTF-8. * PHP 7.0 is the minimum requirement since version 4.0 of Portable UTF-8, otherwise composer will install an older version * PHP 8.0 support is also available and will adapt the behaviours of the native functions. * To speed up string handling, it is recommended that you have "mbstring" or "iconv" available on your server, as well as the latest version of PCRE library * Although Portable UTF-8 is easy to use; moving from native API to Portable UTF-8 may not be straight-forward for everyone. It is highly recommended that you do not update your scripts to include Portable UTF-8 or replace or change anything before you first know the reason and consequences. Most of the time, some native function may be all what you need. * There is also a shim for "mbstring", "iconv" and "intl", so you can use it also on shared webspace. ## Usage Example 1: UTF8::cleanup() ```php echo UTF8::cleanup('�Düsseldorf�'); // will output: // Düsseldorf ``` Example 2: UTF8::strlen() ```php $string = 'string <strong>with utf-8 chars åèä</strong> - doo-bee doo-bee dooh'; echo strlen($string) . "\n<br />"; echo UTF8::strlen($string) . "\n<br />"; // will output: // 70 // 67 $string_test1 = strip_tags($string); $string_test2 = UTF8::strip_tags($string); echo strlen($string_test1) . "\n<br />"; echo UTF8::strlen($string_test2) . "\n<br />"; // will output: // 53 // 50 ``` Example 3: UTF8::fix_utf8() ```php echo UTF8::fix_utf8('Düsseldorf'); echo UTF8::fix_utf8('ä'); // will output: // Düsseldorf // ä ``` # Portable UTF-8 | API The API from the "UTF8"-Class is written as small static methods that will match the default PHP-API. ## Class methods <p id="voku-php-readme-class-methods"></p><table><tr><td><a href="#accessstring-str-int-pos-string-encoding-string">access</a> </td><td><a href="#add_bom_to_stringstring-str-non-empty-string">add_bom_to_string</a> </td><td><a href="#array_change_key_casearray-array-int-case-string-encoding-string">array_change_key_case</a> </td><td><a href="#betweenstring-str-string-start-string-end-int-offset-string-encoding-string">between</a> </td></tr><tr><td><a href="#binary_to_strstring-bin-string">binary_to_str</a> </td><td><a href="#bom-non-empty-string">bom</a> </td><td><a href="#callbackcallablestring-string-ca