18 lines
495 B
PHP
18 lines
495 B
PHP
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<?php
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namespace app\common\yun\util;
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class StringUtil
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{
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public static function round($len = 6)
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{
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$str = 'a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9';
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$arr = explode(' ', $str);
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$rand_keys = array_rand($arr, $len);
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shuffle($rand_keys);
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$code = '';
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foreach ($rand_keys as $index=>$key){
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$code .= $arr[$key];
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}
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return $code;
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}
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}
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