Summary of some methods for generating random passwords in PHP_PHP Tutorial
- WBOYOriginal
- 2016-07-13 17:16:281209browse
When you want to generate a random password, your first thought may be to use the uniquid() function, but if we use array_rand() and range(), we can achieve this function more perfectly.
Method 1,
| The code is as follows |
Copy code |
| 代码如下 |
复制代码 |
|
header("Content-type: text/html; charset=utf-8");
function randCode($length) {
$ranges = array(range('a', 'z'), range('A', 'Z'), range(1, 9));
$code = '';
for($i = 0; $i < $length; $i++){
$rkey = array_rand($ranges);
$vkey = array_rand($ranges[$rkey]);
$code .= $ranges[$rkey][$vkey];
}
return $code;
}
echo "www.bKjia.c0m";
echo randCode(5); // 输出如：3IxY8、E6HOv、1qHiy等等
?>
|
header("Content-type: text/html; charset=utf-8");
function randCode($length) {
$ranges = array(range('a', 'z'), range('A', 'Z'), range(1, 9));
$code = '';
for($i = 0; $i < $length; $i++){
$rkey = array_rand($ranges);
$vkey = array_rand($ranges[$rkey]);
$code .= $ranges[$rkey][$vkey];
}
| 代码如下 |
复制代码 |
|
function create_password($pw_length = 8)
{
$randpwd = '';
for ($i = 0; $i < $pw_length; $i++)
{
$randpwd .= chr(mt_rand(33, 126));
}
return $randpwd;
}
// 调用该函数，传递长度参数$pw_length = 6
echo create_password(6);
|
Return $code;<🎜>
}<🎜>
<🎜>echo "www.bKjia.c0m";<🎜>
echo randCode(5); // Output such as: 3IxY8, E6HOv, 1qHiy, etc.<🎜>
?>
|
Method 2,
1. Generate a random integer from 33 – 126, such as 35,
2. Convert 35 into the corresponding ASCII code character, such as 35 corresponding to #
3. Repeat the above steps 1 and 2 n times to connect into an n-digit password
This algorithm mainly uses two functions. The mt_rand (int $min, int $max) function is used to generate random integers, where $min – $max is the range of ASCII codes. Here it is 33-126, which can be used as needed. Adjustment range, for example, 97 – 122 bits in the ASCII code table correspond to the English letters a – z. For details, please refer to the ASCII code table; chr (int $ascii) function is used to convert the corresponding integer $ascii into the corresponding character.
| The code is as follows |
Copy code |
|
function create_password($pw_length = 8)
{
$randpwd = '';
for ($i = 0; $i < $pw_length; $i++)<🎜>
<🎜>{<🎜>
<🎜>$randpwd .= chr(mt_rand(33, 126));<🎜>
<🎜>}<🎜>
<🎜>return $randpwd;<🎜>
<🎜>}<🎜>
<🎜>// Call this function and pass the length parameter $pw_length = 6<🎜>
<🎜>echo create_password(6);<🎜>
|
Method three,
The code is as follows
| 代码如下 |
复制代码 |
|
//自动为用户随机生成用户名(长度6-13)
function create_password($pw_length = 4){
$randpwd = '';
for ($i = 0; $i < $pw_length; $i++){
$randpwd .= chr(mt_rand(33, 126));
}
return $randpwd;
}
function generate_username( $length = 6 ) {
// 密码字符集，可任意添加你需要的字符
$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|';
$password = '';
for ( $i = 0; $i < $length; $i++ )
{
// 这里提供两种字符获取方式
// 第一种是使用substr 截取$chars中的任意一位字符；
// 第二种是取字符数组$chars 的任意元素
// $password .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
$password .= $chars[ mt_rand(0, strlen($chars) - 1) ];
}
return $password;
}
// 调用该函数
$userId = 'user'.generate_username(6);
$pwd = create_password(9);
|
| Copy code |
|
|
//Automatically generate a random username for the user (length 6-13)
function create_password($pw_length = 4){
$randpwd = '';
for ($i = 0; $i < $pw_length; $i++){
$randpwd .= chr(mt_rand(33, 126));
}
return $randpwd;
}
function generate_username( $length = 6 ) {
// Password character set, you can add any characters you need $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|';
$password = '';
for ( $i = 0; $i < $length; $i++ )
{
// There are two ways to obtain characters here
// The first is to use substr to intercept any character in $chars;
// The second is the arbitrary element of the character array $ char
// $password .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
$password .= $chars[ mt_rand(0, strlen($chars) - 1) ];
}
return $password;
}
// Call this function
$userId = 'user'.generate_username(6);
$pwd = create_password(9);
http://www.bkjia.com/PHPjc/628618.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/628618.htmlTechArticleWhen you want to generate a random password, your first thought may be to use the uniquid() function. But if we use array_rand() and range(), we can achieve this more perfectly...
Statement：The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
