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<?php

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namespace Nextend\Framework\Misc;

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use Nextend\Framework\Misc\StringPhp\MultiByte;

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use Nextend\Framework\Misc\StringPhp\SingleByte;

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use Nextend\Framework\Misc\StringPhp\StringInterface;

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use Nextend\Framework\Pattern\SingletonTrait;

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class Str {

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use SingletonTrait;

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/**

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* @var StringInterface

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private static $engine;

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protected function init() {

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if (function_exists('mb_strpos')) {

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self::$engine = new MultiByte();

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} else {

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self::$engine = new SingleByte();

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}

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}

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public static function strpos($haystack, $needle, $offset = 0) {

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return self::$engine->strpos($haystack, $needle, $offset);

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}

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public static function substr($string, $start, $length = null) {

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return self::$engine->substr($string, $start, $length);

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}

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public static function strlen($string) {

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return self::$engine->strlen($string);

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}

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}

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Str::getInstance();

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