我试图在php中生成一个随机密码。
但是我得到的都是'a'返回类型是数组类型，我希望它是字符串。对如何修改代码有什么想法吗?
谢谢。
function randomPassword() {
$alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789";
for ($i = 0; $i < 8; $i++) {
$n = rand(0, count($alphabet)-1);
$pass[$i] = $alphabet[$n];
}
return $pass;
}
当前回答
该函数将根据参数中的规则生成密码
function random_password( $length = 8, $characters = true, $numbers = true, $case_sensitive = true, $hash = true ) {
$password = '';
if($characters)
{
$charLength = $length;
if($numbers) $charLength-=2;
if($case_sensitive) $charLength-=2;
if($hash) $charLength-=2;
$chars = "abcdefghijklmnopqrstuvwxyz";
$password.= substr( str_shuffle( $chars ), 0, $charLength );
}
if($numbers)
{
$numbersLength = $length;
if($characters) $numbersLength-=2;
if($case_sensitive) $numbersLength-=2;
if($hash) $numbersLength-=2;
$chars = "0123456789";
$password.= substr( str_shuffle( $chars ), 0, $numbersLength );
}
if($case_sensitive)
{
$UpperCaseLength = $length;
if($characters) $UpperCaseLength-=2;
if($numbers) $UpperCaseLength-=2;
if($hash) $UpperCaseLength-=2;
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$password.= substr( str_shuffle( $chars ), 0, $UpperCaseLength );
}
if($hash)
{
$hashLength = $length;
if($characters) $hashLength-=2;
if($numbers) $hashLength-=2;
if($case_sensitive) $hashLength-=2;
$chars = "!@#$%^&*()_-=+;:,.?";
$password.= substr( str_shuffle( $chars ), 0, $hashLength );
}
$password = str_shuffle( $password );
return $password;
}
其他回答
2行的小代码。
演示:http://codepad.org/5rHMHwnH
function rand_string( $length ) {
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
return substr(str_shuffle($chars),0,$length);
}
echo rand_string(8);
使用rand_string，您可以定义将创建多少字符。
该函数将根据参数中的规则生成密码
function random_password( $length = 8, $characters = true, $numbers = true, $case_sensitive = true, $hash = true ) {
$password = '';
if($characters)
{
$charLength = $length;
if($numbers) $charLength-=2;
if($case_sensitive) $charLength-=2;
if($hash) $charLength-=2;
$chars = "abcdefghijklmnopqrstuvwxyz";
$password.= substr( str_shuffle( $chars ), 0, $charLength );
}
if($numbers)
{
$numbersLength = $length;
if($characters) $numbersLength-=2;
if($case_sensitive) $numbersLength-=2;
if($hash) $numbersLength-=2;
$chars = "0123456789";
$password.= substr( str_shuffle( $chars ), 0, $numbersLength );
}
if($case_sensitive)
{
$UpperCaseLength = $length;
if($characters) $UpperCaseLength-=2;
if($numbers) $UpperCaseLength-=2;
if($hash) $UpperCaseLength-=2;
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$password.= substr( str_shuffle( $chars ), 0, $UpperCaseLength );
}
if($hash)
{
$hashLength = $length;
if($characters) $hashLength-=2;
if($numbers) $hashLength-=2;
if($case_sensitive) $hashLength-=2;
$chars = "!@#$%^&*()_-=+;:,.?";
$password.= substr( str_shuffle( $chars ), 0, $hashLength );
}
$password = str_shuffle( $password );
return $password;
}
如果你在PHP7上，你可以使用random_int()函数:
function generate_password($length = 20){
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.
'0123456789`-=~!@#$%^&*()_+,./<>?;:[]{}\|';
$str = '';
$max = strlen($chars) - 1;
for ($i=0; $i < $length; $i++)
$str .= $chars[random_int(0, $max)];
return $str;
}
旧答案如下:
function generate_password($length = 20){
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.
'0123456789`-=~!@#$%^&*()_+,./<>?;:[]{}\|';
$str = '';
$max = strlen($chars) - 1;
for ($i=0; $i < $length; $i++)
$str .= $chars[mt_rand(0, $max)];
return $str;
}
//define a function. It is only 3 lines!
function generateRandomPassword($length = 5){
$chars = "0123456789bcdfghjkmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ";
return substr(str_shuffle($chars),0,$length);
}
//usage
echo generateRandomPassword(5); //random password legth: 5
echo generateRandomPassword(6); //random password legth: 6
echo generateRandomPassword(7); //random password legth: 7
Generates a strong password of length 8 containing at least one lower case letter, one uppercase letter, one digit, and one special character. You can change the length in the code too. function checkForCharacterCondition($string) { return (bool) preg_match('/(?=.*([A-Z]))(?=.*([a-z]))(?=.*([0-9]))(?=.*([~`\!@#\$%\^&\*\(\)_\{\}\[\]]))/', $string); } $j = 1; function generate_pass() { global $j; $allowedCharacters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ~`!@#$%^&*()_{}[]'; $pass = ''; $length = 8; $max = mb_strlen($allowedCharacters, '8bit') - 1; for ($i = 0; $i < $length; ++$i) { $pass .= $allowedCharacters[random_int(0, $max)]; } if (checkForCharacterCondition($pass)){ return '<br><strong>Selected password: </strong>'.$pass; }else{ echo 'Iteration '.$j.': <strong>'.$pass.'</strong> Rejected<br>'; $j++; return generate_pass(); } } echo generate_pass();
