21 lines
570 B
PHP
21 lines
570 B
PHP
<?php
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namespace Yzh\Utils;
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class MessString
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{
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const MIN_RAND_LENGTH = 8;
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const DEFAULT_RAND_LENGTH = 16;
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const MAX_RAND_LENGTH = 64;
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const ALL_STRING_CHARS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-+_';
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/**
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* @param $length
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* @return false|string
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*/
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public static function rand($length = 16)
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{
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return substr(str_shuffle(self::ALL_STRING_CHARS), 0, $length > self::MAX_RAND_LENGTH ? self::DEFAULT_RAND_LENGTH : ($length < self::MIN_RAND_LENGTH ? self::DEFAULT_RAND_LENGTH : $length));
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}
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}
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