Summary of some methods for generating random passwords in PHP

Summary of some methods for generating random passwords in PHP_PHP Tutorial

WBOY

Release： 2016-07-13 17:16:28

Original

1235 people have browsed it

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;

}