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/vendor/zendframework/zend-stdlib/src/StringWrapper/ -> Intl.php (source)

   1  <?php
   2  /**
   3   * Zend Framework (http://framework.zend.com/)
   4   *
   5   * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6   * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
   7   * @license   http://framework.zend.com/license/new-bsd New BSD License
   8   */
   9  
  10  namespace Zend\Stdlib\StringWrapper;
  11  
  12  use Zend\Stdlib\Exception;
  13  
  14  class Intl extends AbstractStringWrapper
  15  {
  16      /**
  17       * List of supported character sets (upper case)
  18       *
  19       * @var string[]
  20       */
  21      protected static $encodings = array('UTF-8');
  22  
  23      /**
  24       * Get a list of supported character encodings
  25       *
  26       * @return string[]
  27       */
  28      public static function getSupportedEncodings()
  29      {
  30          return static::$encodings;
  31      }
  32  
  33      /**
  34       * Constructor
  35       *
  36       * @throws Exception\ExtensionNotLoadedException
  37       */
  38      public function __construct()
  39      {
  40          if (!extension_loaded('intl')) {
  41              throw new Exception\ExtensionNotLoadedException(
  42                  'PHP extension "intl" is required for this wrapper'
  43              );
  44          }
  45      }
  46  
  47      /**
  48       * Returns the length of the given string
  49       *
  50       * @param string $str
  51       * @return int|false
  52       */
  53      public function strlen($str)
  54      {
  55          return grapheme_strlen($str);
  56      }
  57  
  58      /**
  59       * Returns the portion of string specified by the start and length parameters
  60       *
  61       * @param string   $str
  62       * @param int      $offset
  63       * @param int|null $length
  64       * @return string|false
  65       */
  66      public function substr($str, $offset = 0, $length = null)
  67      {
  68          // Due fix of PHP #62759 The third argument returns an empty string if is 0 or null.
  69          if ($length !== null) {
  70              return grapheme_substr($str, $offset, $length);
  71          }
  72  
  73          return grapheme_substr($str, $offset);
  74      }
  75  
  76      /**
  77       * Find the position of the first occurrence of a substring in a string
  78       *
  79       * @param string $haystack
  80       * @param string $needle
  81       * @param int    $offset
  82       * @return int|false
  83       */
  84      public function strpos($haystack, $needle, $offset = 0)
  85      {
  86          return grapheme_strpos($haystack, $needle, $offset);
  87      }
  88  }


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