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<?php
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namespace common\helpers;
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/**
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* Class StringHelper
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* @package common\helpers
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8
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*/
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9
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class StringHelper extends \yii\helpers\StringHelper
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{
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/**
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* Первая буква - заглавная
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*
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* @param $string
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* @param string $e
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* @return string
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*/
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public static function ucfirst($string, $e = 'utf-8')
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{
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if (function_exists('mb_strtoupper') && function_exists('mb_substr') && !empty($string)) {
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$string = mb_strtolower($string, $e);
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$upper = mb_strtoupper($string, $e);
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preg_match('#(.)#us', $upper, $matches);
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$string = $matches[1] . mb_substr($string, 1, mb_strlen($string, $e), $e);
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} else {
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$string = ucfirst($string);
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}
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return $string;
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}
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/**
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* Форматирует и конвертирует кол-во байт, возвращает строку
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*
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* Например: 9.54 MB
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*
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* @param $bytes
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* @param int $precision
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* @return string
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*/
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public static function formatBytes($bytes, $precision = 2)
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{
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$units = ['B', 'KB', 'MB', 'GB', 'TB'];
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$bytes = max($bytes, 0);
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$pow = floor(($bytes ? log($bytes) : 0) / log(1024));
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$pow = min($pow, count($units) - 1);
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$bytes /= pow(1024, $pow);
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return round($bytes, $precision) . ' ' . $units[$pow];
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}
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/**
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* Генерация случайной строки
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*
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* @param int $length
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* @param bool $allowUppercase
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* @return string
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*/
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public static function generateRandomString($length = 8, $allowUppercase = true)
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{
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$validCharacters = 'abcdefghijklmnopqrstuxyvwz1234567890';
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if ($allowUppercase) {
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$validCharacters .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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}
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$validCharNumber = strlen($validCharacters);
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$result = '';
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for ($i = 0; $i < $length; $i++) {
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$index = mt_rand(0, $validCharNumber - 1);
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$result .= $validCharacters[$index];
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}
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return $result;
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}
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}
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Dominus77 /
yii2-advanced-start
