PHP之string之str_shuffle()函数使用
str_shuffle
- (PHP 4 >= 4.3.0, PHP 5, PHP 7)
- str_shuffle — Randomly shuffles a string
- str_shuffle — 随机打乱一个字符串
Description
string str_shuffle ( string $str ) //str_shuffle() shuffles a string. One permutation of all possible is created. //str_shuffle() 函数打乱一个字符串,使用任何一种可能的排序方案。
Caution
- This function does not generate cryptographically secure values, and should not be used for cryptographic purposes. If you need a cryptographically secure value, consider using random_int(), random_bytes(), or openssl_random_pseudo_bytes() instead.
- 本函数并不会生成安全加密的值,不应用于加密用途。若需要安全加密的值,考虑使用openssl_random_pseudo_bytes()。
Parameters
str
- The input string.
- 输入字符串。
Return Values
- Returns the shuffled string.
- 返回打乱后的字符串。
Changelog
- 7.1.0 The internal randomization algorithm has been changed to use the » Mersenne Twister Random Number Generator instead of the libc rand function.
- 内置的随机算法从 libc rand 函数改成了» 梅森旋转演伪随机数发生算法。
Examples
<?php /** * Created by PhpStorm. * User: zhangrongxiang * Date: 2018/3/7 * Time: 下午10:04 */ $str = "abcde"; echo str_shuffle( $str ) . PHP_EOL; echo str_shuffle( $str ) . PHP_EOL; echo str_shuffle( $str ) . PHP_EOL; echo str_shuffle( $str ) . PHP_EOL; ///////////////////////////////////////////////////////////////////////////////// function scramble_word( $word ) { if ( strlen( $word ) < 2 ) { return $word; } else { return $word{0} . str_shuffle( substr( $word, 1, - 1 ) ) . $word{strlen( $word ) - 1}; } } //echo preg_replace('/(\w+)/e', 'scramble_word("\1")', 'A quick brown fox jumped over the lazy dog.'); echo scramble_word( "A quick brown fox jumped over the lazy dog." ) . PHP_EOL; /////////////////////////////////////////////////////////////////////////////// /**This function is affected by srand():*/ srand( 12345 ); echo str_shuffle( 'Randomize me' ) . PHP_EOL; // demmiezR aon echo str_shuffle( 'Randomize me' ) . PHP_EOL; //izadmeo Rmen srand( 12345 ); echo str_shuffle( 'Randomize me' ) . PHP_EOL; // demmiezR aon //////////////////////////////////////////////////////////////////////////// // not very true srand(time()); function unicode_shuffle( $string, $chars, $format = 'UTF-8' ) { $rands = []; for ( $i = 0; $i < $chars; $i ++ ) { $rands[ $i ] = rand( 0, mb_strlen( $string, $format ) ); } $s = null; foreach ( $rands as $r ) { $s .= mb_substr( $string, $r, 1, $format ); } return $s; } echo unicode_shuffle( "万物结对象", 3 ) . PHP_EOL;
See
All rights reserved
相关推荐
Lzs 2020-10-23
聚合室 2020-11-16
零 2020-09-18
Justhavefun 2020-10-22
jacktangj 2020-10-14
ChaITSimpleLove 2020-10-06
Andrea0 2020-09-18
周游列国之仕子 2020-09-15
afanti 2020-09-16
88234852 2020-09-15
YClimb 2020-09-15
风雨断肠人 2020-09-04
卖口粥湛蓝的天空 2020-09-15
stulen 2020-09-15
pythonxuexi 2020-09-06
abfdada 2020-08-26
梦的天空 2020-08-25