php 在php中生成随机代码？
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generating a random code in php?
提问by getaway
i know this might seem silly, but i want to generate a random code of 8 characetrs, only numbers or letters using php. i needs this to generate a password for each user that signs up, thanks
我知道这可能看起来很傻，但我想使用 php 生成一个包含 8 个字符的随机代码，只有数字或字母。我需要这个来为每个注册的用户生成一个密码，谢谢
回答by eriksv88
I would rather use md5to generate passwords
我宁愿使用md5来生成密码
But you can use something like this if you want a custom:
但是如果你想要一个自定义，你可以使用这样的东西：
function createRandomPassword() {
$chars = "abcdefghijkmnopqrstuvwxyz023456789";
srand((double)microtime()*1000000);
$i = 0;
$pass = '' ;
while ($i <= 7) {
$num = rand() % 33;
$tmp = substr($chars, $num, 1);
$pass = $pass . $tmp;
$i++;
}
return $pass;
}
回答by Jeremy
What about something like this, for ease:
像这样的事情怎么样，为了方便：
$pass = substr(md5(uniqid(mt_rand(), true)) , 0, 8);
回答by jondavidjohn
<?php
$uniqid = uniqid();
$rand_start = rand(1,5);
$rand_8_char = substr($uniqid,$rand_start,8);
?>
回答by Abhi
A good or efficient method for doing this is:
这样做的一个好的或有效的方法是：
public function generateRandomString($length = 8) {
$characters = '0123456789abcdefghijklmnopqrs092u3tuvwxyzaskdhfhf9882323ABCDEFGHIJKLMNksadf9044OPQRSTUVWXYZ';
$charactersLength = strlen($characters);
$randomString = '';
for ($i = 0; $i < $length; $i++) {
$randomString .= $characters[rand(0, $charactersLength - 1)];
}
return $randomString;
}
By changing $length variable you can generate alphanumeric code according to your need.
通过更改 $length 变量，您可以根据需要生成字母数字代码。
回答by Sean Vieira
PHP has a randfunction (and also a mt_randfunction that the docs claim is faster.)
PHP 有一个rand函数（还有一个mt_rand文档声称更快的函数。）
So do something like this:
所以做这样的事情：
$i = 0;
$pwd = "";
while ( $i < 10) {
if (mt_rand() % 2 == 0) {
$pwd .= rand();
} else {
$pwd .= char(rand());
// http://php.net/manual/en/function.chr.php
}
$i += 1;
}
回答by mario
Use base64_encode(), feed it some rand()numbers, and cut off the first 8 characters, which are definitely letters or numbers. That's not a totally random combination due to the input being just integers. But it's good enough for default user-passwords. (Else use rand()via chr()before encoding.)
使用base64_encode()，给它输入一些rand()数字，并截掉前 8 个字符，这些字符肯定是字母或数字。由于输入只是整数，这不是完全随机的组合。但是对于默认用户密码来说已经足够了。（否则在编码之前使用rand()via chr()。）
回答by Mohamad Hamouday
This work like charm and you can choose the type of characters that will be generated like:
"Upper_Case", "Lower_Case", "Number", "Special_Character"
这就像魅力一样，您可以选择将生成的字符类型，例如：
“Upper_Case”、“Lower_Case”、“Number”、“Special_Character”
function Create_Random_Code($Length = 8, $IN_Params = [])
{
$IN_Params['Upper_Case'] = isset($IN_Params['Upper_Case']) ? $IN_Params['Upper_Case'] : true;
$IN_Params['Lower_Case'] = isset($IN_Params['Lower_Case']) ? $IN_Params['Lower_Case'] : true;
$IN_Params['Number'] = isset($IN_Params['Number']) ? $IN_Params['Number'] : true;
$IN_Params['Special_Character'] = isset($IN_Params['Special_Character']) ? $IN_Params['Special_Character'] : false;
$Chars = '';
if($IN_Params['Lower_Case'])
{
$Chars .= "abcdefghijklmnopqrstuvwxyz";
}
if($IN_Params['Upper_Case'])
{
$Chars .= "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
}
if($IN_Params['Number'])
{
$Chars .= "0123456789";
}
if($IN_Params['Special_Character'])
{
$Chars .= "!@#$%^&*()_-=+;:,.";
}
return substr(str_shuffle($Chars), 0, $Length);
}
To use it:
要使用它：
echo Create_Random_Code(6,[
'Upper_Case' => true,
'Lower_Case' => true,
'Number' => true,
'Special_Character' => false
]);
回答by Sajjad Hossain
You can use this,
你可以用这个，
function rand_code($len)
{
$min_lenght= 0;
$max_lenght = 100;
$bigL = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$smallL = "abcdefghijklmnopqrstuvwxyz";
$number = "0123456789";
$bigB = str_shuffle($bigL);
$smallS = str_shuffle($smallL);
$numberS = str_shuffle($number);
$subA = substr($bigB,0,5);
$subB = substr($bigB,6,5);
$subC = substr($bigB,10,5);
$subD = substr($smallS,0,5);
$subE = substr($smallS,6,5);
$subF = substr($smallS,10,5);
$subG = substr($numberS,0,5);
$subH = substr($numberS,6,5);
$subI = substr($numberS,10,5);
$RandCode1 = str_shuffle($subA.$subD.$subB.$subF.$subC.$subE);
$RandCode2 = str_shuffle($RandCode1);
$RandCode = $RandCode1.$RandCode2;
if ($len>$min_lenght && $len<$max_lenght)
{
$CodeEX = substr($RandCode,0,$len);
}
else
{
$CodeEX = $RandCode;
}
return $CodeEX;
}
Details Random code generator in PHP
详细信息PHP 中的随机代码生成器
