php常用随机数生成方法_php教程_php教程

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php常用随机数生成方法

时间:2015-06-19 12:29来源:未知作者:最模板点击:次

?php function mt_rand_str( $l , $c = abcdefghijklmnopqrstuvwxyz1234567890 ) { for ( $s = , $cl = strlen ( $c ) - 1, $i = 0; $i $l ; $s .= $c [mt_rand(0, $cl )], ++ $i ) ; return $s ; } //随机生成各种长度的字符串 echo mt_rand_str

<?php

function mt_rand_str($l, $c = 'abcdefghijklmnopqrstuvwxyz1234567890')

{

for ($s = '', $cl = strlen($c) - 1, $i = 0; $i < $l; $s .= $c[mt_rand(0, $cl)], ++$i) ;

return $s;

}

//随机生成各种长度的字符串

echo mt_rand_str(8); // Something like mp2tmpsw

echo " ";

echo mt_rand_str(6, '0123456789ABCDEF'); // Something like B9CD0F

echo " ";

//可以生成邀请码之类的字符串

$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';

$shuffled = str_shuffle($str);

$need = substr($shuffled, 28);

echo $shuffled;

echo " ";

echo $need;

echo " ";

//生成当前日期字符串

$time_string = date("YmdHis");

echo $time_string;

echo " ";

//可以生成订单号

$yCode = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J');

$orderSn = $yCode[intval(date('Y')) - 2011] . strtoupper(dechex(date('m'))) . date('d') . substr(time(), -5) . substr(microtime(), 2, 5) . sprintf('%02d', rand(0, 99));

echo $orderSn;

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