php 在 Laravel 中生成随机数
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Generate random number in Laravel
提问by kacyblack
Please am working on a Project on Laravel and I wanted to Generate a Random Number in this format: one character in any position order and the rest integers. Example: C87465398745635, 87474M745436475, 98487464655378J8 etc. and this is my Controller:
请在 Laravel 上开展一个项目，我想以这种格式生成一个随机数：任何位置顺序的一个字符和其余的整数。示例：C87465398745635、87474M745436475、98487464655378J8 等，这是我的控制器：
function generatePin( $number ) {
$pins = array();
for ($j=0; $j < $number; $j++) {
$string = str_random(15);
$pin = Pin::where('pin', '=', $string)->first();
if($pin){
$j--;
}else{
$pins[$j] = $string;
}
}
return $pins;
}
But it seems to be Generating something else like this: ZsbpEKw9lRHqGbv, i7LjvSiHgeGrNN8, pyJEcjhjd3zu9Su I have tried all I could but no success, Please any helping solution will be appreciated, Thanks
但它似乎正在生成其他类似的东西：ZsbpEKw9lRHqGbv、i7LjvSiHgeGrNN8、pyJEcjhjd3zu9Su 我已经尽我所能但没有成功，请任何帮助解决方案将不胜感激，谢谢
回答by Luís Cruz
If you want to generate the random string like you said, replace:
如果你想像你说的那样生成随机字符串，请替换：
$string = str_random(15);
with
和
// Available alpha caracters
$characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
// generate a pin based on 2 * 7 digits + a random character
$pin = mt_rand(1000000, 9999999)
. mt_rand(1000000, 9999999)
. $characters[rand(0, strlen($characters) - 1)];
// shuffle the result
$string = str_shuffle($pin);
Edit:
编辑：
Before, the code wasn't generating a random alpha character all the time. Thats because Laravel's str_randomgenerates a random alpha-numeric string, and sometimes that function returned a numeric value (see docs).
之前，代码并不是一直生成随机的字母字符。那是因为 Laravel 会str_random生成一个随机的字母数字字符串，有时该函数会返回一个数值（请参阅文档）。
回答by Vainglory07
Assuming that the $numberyou pass on generatePin is the length of pin:
假设$number你通过 generatePin 是 pin 的长度：
function generatePin( $number ) {
// Generate set of alpha characters
$alpha = array();
for ($u = 65; $u <= 90; $u++) {
// Uppercase Char
array_push($alpha, chr($u));
}
// Just in case you need lower case
// for ($l = 97; $l <= 122; $l++) {
// // Lowercase Char
// array_push($alpha, chr($l));
// }
// Get random alpha character
$rand_alpha_key = array_rand($alpha);
$rand_alpha = $alpha[$rand_alpha_key];
// Add the other missing integers
$rand = array($rand_alpha);
for ($c = 0; $c < $number - 1; $c++) {
array_push($rand, mt_rand(0, 9));
shuffle($rand);
}
return implode('', $rand);
}
