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Direktori : /home2/selectio/www/mm-tailor-billing/vendor/zendframework/zend-stdlib/src/ |
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<?php /** * Zend Framework (http://framework.zend.com/) * * @link http://github.com/zendframework/zf2 for the canonical source repository * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ namespace Zend\Stdlib; use Zend\Stdlib\StringWrapper\StringWrapperInterface; /** * Utility class for handling strings of different character encodings * using available PHP extensions. * * Declared abstract, as we have no need for instantiation. */ abstract class StringUtils { /** * Ordered list of registered string wrapper instances * * @var StringWrapperInterface[] */ protected static $wrapperRegistry = null; /** * A list of known single-byte character encodings (upper-case) * * @var string[] */ protected static $singleByteEncodings = [ 'ASCII', '7BIT', '8BIT', 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3', 'ISO-8859-4', 'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9', 'ISO-8859-10', 'ISO-8859-11', 'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16', 'CP-1251', 'CP-1252', // TODO ]; /** * Is PCRE compiled with Unicode support? * * @var bool **/ protected static $hasPcreUnicodeSupport = null; /** * Get registered wrapper classes * * @return string[] */ public static function getRegisteredWrappers() { if (static::$wrapperRegistry === null) { static::$wrapperRegistry = []; if (extension_loaded('intl')) { static::$wrapperRegistry[] = 'Zend\Stdlib\StringWrapper\Intl'; } if (extension_loaded('mbstring')) { static::$wrapperRegistry[] = 'Zend\Stdlib\StringWrapper\MbString'; } if (extension_loaded('iconv')) { static::$wrapperRegistry[] = 'Zend\Stdlib\StringWrapper\Iconv'; } static::$wrapperRegistry[] = 'Zend\Stdlib\StringWrapper\Native'; } return static::$wrapperRegistry; } /** * Register a string wrapper class * * @param string $wrapper * @return void */ public static function registerWrapper($wrapper) { $wrapper = (string) $wrapper; if (! in_array($wrapper, static::$wrapperRegistry, true)) { static::$wrapperRegistry[] = $wrapper; } } /** * Unregister a string wrapper class * * @param string $wrapper * @return void */ public static function unregisterWrapper($wrapper) { $index = array_search((string) $wrapper, static::$wrapperRegistry, true); if ($index !== false) { unset(static::$wrapperRegistry[$index]); } } /** * Reset all registered wrappers so the default wrappers will be used * * @return void */ public static function resetRegisteredWrappers() { static::$wrapperRegistry = null; } /** * Get the first string wrapper supporting the given character encoding * and supports to convert into the given convert encoding. * * @param string $encoding Character encoding to support * @param string|null $convertEncoding OPTIONAL character encoding to convert in * @return StringWrapperInterface * @throws Exception\RuntimeException If no wrapper supports given character encodings */ public static function getWrapper($encoding = 'UTF-8', $convertEncoding = null) { foreach (static::getRegisteredWrappers() as $wrapperClass) { if ($wrapperClass::isSupported($encoding, $convertEncoding)) { $wrapper = new $wrapperClass($encoding, $convertEncoding); $wrapper->setEncoding($encoding, $convertEncoding); return $wrapper; } } throw new Exception\RuntimeException( 'No wrapper found supporting "' . $encoding . '"' . (($convertEncoding !== null) ? ' and "' . $convertEncoding . '"' : '') ); } /** * Get a list of all known single-byte character encodings * * @return string[] */ public static function getSingleByteEncodings() { return static::$singleByteEncodings; } /** * Check if a given encoding is a known single-byte character encoding * * @param string $encoding * @return bool */ public static function isSingleByteEncoding($encoding) { return in_array(strtoupper($encoding), static::$singleByteEncodings); } /** * Check if a given string is valid UTF-8 encoded * * @param string $str * @return bool */ public static function isValidUtf8($str) { return is_string($str) && ($str === '' || preg_match('/^./su', $str) == 1); } /** * Is PCRE compiled with Unicode support? * * @return bool */ public static function hasPcreUnicodeSupport() { if (static::$hasPcreUnicodeSupport === null) { ErrorHandler::start(); static::$hasPcreUnicodeSupport = defined('PREG_BAD_UTF8_OFFSET_ERROR') && preg_match('/\pL/u', 'a') == 1; ErrorHandler::stop(); } return static::$hasPcreUnicodeSupport; } }