PHP生成随机码的思路与方法实例探索

function get_rand_ascii($pw_length = 5){  $randpwd = '';  for ($i = 0; $i < $pw_length; $i++) {    $randpwd .= chr(mt_rand(33, 99));  }  return $randpwd;}

function getRandomString($length=5) {  //可任意添加需要的字符  $chars = array(    "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", "0", "1", "2",    "3", "4", "5", "6", "7", "8", "9"  );  $charsLen = count ( $chars ) - 1;  shuffle ( $chars ); // 将数组打乱  $output = "";  for($i = 0; $i < $length; $i ++) {    $output .= $chars [mt_rand ( 0, $charsLen )];  }  return $output;}

function get_pass( $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;}

public function getRand(){  $rand = rand(10000,100000);  $str = substr(base64_encode($rand), 0, 5);  return $str;}

$password = 'password1232456';//前端 获取的原始密码//数据库存放的 使用BCRYPT算法加密的密码//此处仅为测试，实际应用时应从数据表中查询获得//$db_pass = '$2y$10$2vJJC.rb/swAUnTfc9B94.l/ix75kiZHvOZFpu0Dd8uzp07YWlj4q';$db_pass = password_hash($password, PASSWORD_BCRYPT);if (password_verify($password , $db_pass)){  echo "密码匹配";}else{  echo "密码错误";}