function genToken( $len = 32, $md5 = true ) {
mt_srand( (double)microtime()*1000000 );
$chars = array(
'Q', '@', '8', 'y', '%', '^', '5', 'Z', '(', 'G', '_', 'O', '`',
'S', '-', 'N', '<', 'D', '{', '}', '[', ']', 'h', ';', 'W', '.',
'/', '|', ':', '1', 'E', 'L', '4', '&', '6', '7', '#', '9', 'a',
'A', 'b', 'B', '~', 'C', 'd', '>', 'e', '2', 'f', 'P', 'g', ')',
'?', 'H', 'i', 'X', 'U', 'J', 'k', 'r', 'l', '3', 't', 'M', 'n',
'=', 'o', '+', 'p', 'F', 'q', '!', 'K', 'R', 's', 'c', 'm', 'T',
'v', 'j', 'u', 'V', 'w', ',', 'x', 'I', '$', 'Y', 'z', '*'
);
$numChars = count($chars) - 1; $token = '';
for ( $i=0; $i<$len; $i++ )
$token .= $chars[ mt_rand(0, $numChars) ];
if ( $md5 ) {
$chunks = ceil( strlen($token) / 32 ); $md5token = '';
for ( $i=1; $i<=$chunks; $i++ )
$md5token .= md5( substr($token, $i * 32 - 32, 32) );
$token = substr($md5token, 0, $len);
} return $token;
}
echo genToken();
function get_random($len=3){
//range 是将10到99列成一个数组
$numbers = range (10,99);
//shuffle 将数组顺序随即打乱
shuffle ($numbers);
//取值起始位置随机
$start = mt_rand(1,10);
//取从指定定位置开始的若干数
$result = array_slice($numbers,$start,$len);
$random = "";
for ($i=0;$i<$len;$i++){
$random = $random.$result[$i];
}
return $random;
}
//随机数
function get_random2($length = 4) {
$min = pow(10 , ($length - 1));
$max = pow(10, $length) - 1;
return mt_rand($min, $max);
}
echo "
";
echo get_random(3);
echo "
";
echo get_random2(6);
1、在 33 – 126 中生成一个随机整数,如 35,
2、将 35 转换成对应的ASCII码字符 #
3、重复以上 1、2 步骤 n 次,连接成 n 位的密码
function create_password($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);
1、预置一个的字符串 $chars ,包括 a – z,A – Z,0 – 9,以及一些特殊字符
2、在 $chars 字符串中随机取一个字符
3、重复第二步 n 次,可得长度为 n 的密码
function generate_password( $length = 8 ) {
// 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 $password;
}
echo generate_password();
function GetfourStr($len)
{
$chars_array = array(
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
"l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
"w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
"S", "T", "U", "V", "W", "X", "Y", "Z",
);
$charsLen = count($chars_array) - 1;
$outputstr = "";
for ($i=0; $i<$len; $i++)
{
$outputstr .= $chars_array[mt_rand(0, $charsLen)];
}
return $outputstr;
}
echo GetfourStr(4);
$rand_array = array();
function get_rand_n($rand_array) {
$num = 200;//数字自定义
$rand_number = mt_rand(1,10);//范围自定义
if(empty($rand_array)) {
$rand_array[] = $rand_number;
return get_rand_n($rand_array);
} else {
$count = 0;
foreach($rand_array as $item) {
$count += $item;
}
if($count < $num) {
if($count+$rand_number == $num) {
$rand_array[] = $rand_number;
return $rand_array;
} else if($count+$rand_number < $num) {
$rand_array[] = $rand_number;
return get_rand_n($rand_array); // 回掉再次计算
} else { // 如果得到的值大于了100
return get_rand_n($rand_array); // 重新获得随机数,知道为100的时候返回这个随机数数组
}
}
}
}
$rand_array = get_rand_n($rand_array);
var_dump($rand_array);