<?php
/**
* @see https://github.com/laminas/laminas-stdlib for the canonical source repository
* @copyright https://github.com/laminas/laminas-stdlib/blob/master/COPYRIGHT.md
* @license https://github.com/laminas/laminas-stdlib/blob/master/LICENSE.md New BSD License
*/
namespace Laminas\Stdlib\StringWrapper;
use Laminas\Stdlib\Exception;
class Intl extends AbstractStringWrapper
{
/**
* List of supported character sets (upper case)
*
* @var string[]
*/
protected static $encodings = ['UTF-8'];
/**
* Get a list of supported character encodings
*
* @return string[]
*/
public static function getSupportedEncodings()
{
return static::$encodings;
}
/**
* Constructor
*
* @throws Exception\ExtensionNotLoadedException
*/
public function __construct()
{
if (! extension_loaded('intl')) {
throw new Exception\ExtensionNotLoadedException(
'PHP extension "intl" is required for this wrapper'
);
}
}
/**
* Returns the length of the given string
*
* @param string $str
* @return int|false
*/
public function strlen($str)
{
return grapheme_strlen($str);
}
/**
* Returns the portion of string specified by the start and length parameters
*
* @param string $str
* @param int $offset
* @param int|null $length
* @return string|false
*/
public function substr($str, $offset = 0, $length = null)
{
// Due fix of PHP #62759 The third argument returns an empty string if is 0 or null.
if ($length !== null) {
return grapheme_substr($str, $offset, $length);
}
return grapheme_substr($str, $offset);
}
/**
* Find the position of the first occurrence of a substring in a string
*
* @param string $haystack
* @param string $needle
* @param int $offset
* @return int|false
*/
public function strpos($haystack, $needle, $offset = 0)
{
return grapheme_strpos($haystack, $needle, $offset);
}
}