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PHP用户验证和标签推荐的简单使用
网络编程 2024/9/24 佚名
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本文给大家讲解一些最简单的验证知识。大家可以先看下效果图，如果大家感觉还不错，请参考实现代码。

效果图

PHP用户验证和标签推荐的简单使用

bookmark_fns.php

<"htmlcode">



<"htmlcode">



<"Could not connect to database server", 1);
}else {
return $db;
}
}
"htmlcode">



<"select * from user where username = '".$username."'");
if (!$results) {
throw new Exception("Could not execute query", 1);
}
if ($results -> num_rows > 0) {
throw new Exception("That username is taken - go back and choose another one.", 1);
} 
$results = $conn -> query("insert into user values ('".$username."', sha1('".$email."'), '".$password."')");
if (!$results) {
throw new Exception('Could not register you in database - please try again later.');
}
return true;
}
// Log in 
function login($username, $password) {
$conn = db_connect();
$results = $conn -> query("select * from user where username = '".$username."' and passwd = sha1('".$password."')");
if (!$results) {
throw new Exception('Could not log you in.');
}
if ($results -> num_rows > 0) {
return true;
}else {
throw new Exception('Could not log you in.');
}
}
// Check valid user 
function check_valid_user() {
if (isset($_SESSION['valid_user'])) {
echo "Logged in as ".$_SESSION['valid_user'].".<br />";
}else {
do_html_header('Problem:');
echo "You are not logged in.<br />";
do_html_url('login.php', 'Login');
do_html_foot();
exit;
}
}
// change password 
function change_password($username, $old_password, $new_password) {
login($username, $old_password);
$conn = db_connect();

$result = $conn -> query("update user set passwd = sha1('".$new_password."') where username = '".$username."'");
if (!$result) {
throw new Exception('Password could not be changed.');
} else {
return true; // changed successfully
}
}
function get_random_word($min_length, $max_length) {
// grab a random word from dictionary between the two lengths
// and return it
// generate a random word
$word = '';
// remember to change this path to suit your system
$dictionary = '/usr/dict/words'; // the ispell dictionary
$fp = @fopen($dictionary, 'r');
if(!$fp) {
return false;
}
$size = filesize($dictionary);
// go to a random location in dictionary
$rand_location = rand(0, $size);
fseek($fp, $rand_location);
// get the next whole word of the right length in the file
while ((strlen($word) < $min_length) || (strlen($word)>$max_length) || (strstr($word, "'"))) {
if (feof($fp)) {
fseek($fp, 0); // if at end, go to start
}
$word = fgets($fp, 80); // skip first word as it could be partial
$word = fgets($fp, 80); // the potential password
}
$word = trim($word); // trim the trailing \n from fgets
return $word;
}
function reset_password($username) {
// set password for username to a random value
// return the new password or false on failure
// get a random dictionary word b/w 6 and 13 chars in length
$new_password = get_random_word(6, 13);

if($new_password == false) {
throw new Exception('Could not generate new password.');
}
// add a number between 0 and 999 to it
// to make it a slightly better password
$rand_number = rand(0, 999);
$new_password .= $rand_number;
// set user's password to this in database or return false
$conn = db_connect();
$result = $conn->query("update user
set passwd = sha1('".$new_password."')
where username = '".$username."'");
if (!$result) {
throw new Exception('Could not change password.'); // not changed
} else {
return $new_password; // changed successfully
}
}
function notify_password($username, $password) {
// notify the user that their password has been changed
$conn = db_connect();
$result = $conn->query("select email from user
where username='".$username."'");
if (!$result) {
throw new Exception('Could not find email address.');
} else if ($result->num_rows == 0) {
throw new Exception('Could not find email address.');
// username not in db
} else {
$row = $result->fetch_object();
$email = $row->email;
$from = "From: support@phpbookmark \r\n";
$mesg = "Your PHPBookmark password has been changed to ".$password."\r\n"
."Please change it next time you log in.\r\n";
if (mail($email, 'PHPBookmark login information', $mesg, $from)) {
return true;
} else {
throw new Exception('Could not send email.');
}
}
}
"htmlcode">



<"select bm_URL 
from bookmark 
where username = '" . $username . "'");
if (!$results) {
return false;
}
$url_array = array();
for ($i = 1;$row = $results -> fetch_row();++$i) {
$url_array[$i] = $row[0];
}
return $url_array;
}
// Add url to db
function add_bm($new_url) {
echo "Attempting to add ".htmlspecialchars($new_url)."<br />";
$valid_user = $_SESSION['valid_user'];
$conn = db_connect();
$results = $conn -> query(" select * from bookmark 
where username = '".$valid_user."' 
and bm_URL = '".$new_url."'");
if ($results && ($results -> num_rows > 0)) {
throw new Exception("Bookmark already exists.", 1); 
}
$insert_result = $conn -> query("insert into bookmark values ('".$valid_user."', '".addslashes($new_url)."')");
if (!$insert_result) {
throw new Exception("Bookmark could not be inserted.", 1); 
}
return true;
}
// Delete url 
function delete_bm($user, $url) {
$conn = db_connect();
$results = $conn -> query(" delete from bookmark 
where username = '".$user."' 
and bm_URL = '".$url."'");
if (!$results) {
throw new Exception("Bookmark could not be deleted.", 1); 
}
return true; 
}
function recommend_urls($valid_user, $popularity = 1) {
$conn = db_connect();
// $query = "select bm_URL
// from bookmark
// where username in
// (select distinct(b2.username)
// from bookmark b1, bookmark b2
// where b1.username='".$valid_user."'
// and b1.username != b2.username
// and b1.bm_URL = b2.bm_URL)
// and bm_URL not in
// (select bm_URL
// from bookmark
// where username='".$valid_user."')
// group by bm_url
// having count(bm_url)>".$popularity;
$query = "select bm_URL
from bookmark
where username in
(select distinct(b2.username)
from bookmark b1, bookmark b2
where b1.username='".$valid_user."'
and b1.username != b2.username
and b1.bm_URL = b2.bm_URL)
and bm_URL not in
(select bm_URL
from bookmark
where username='".$valid_user."')
group by bm_url
having count(bm_url)>".$popularity;
if (!($result = $conn->query($query))) {
throw new Exception('Could not find any bookmarks to recommend.');
}
if ($result->num_rows==0) {
throw new Exception('Could not find any bookmarks to recommend.');
}
$urls = array();
// build an array of the relevant urls
for ($count=0; $row = $result->fetch_object(); $count++) {
$urls[$count] = $row->bm_URL;
}
return $urls;
}
"htmlcode">



<"005.png" alt="PHPbookmark logo" border="0"
align="left" valign="bottom" height="55" width="57" />
<h1>PHPbookmark</h1>
<hr />
<"<"><"register_form.php">Not a member"post" action="member.php">
<table bgcolor="#cccccc">
<tr>
<td colspan="2">Members log in here:</td>
<tr>
<td>Username:</td>
<td><input type="text" name="username"/></td></tr>
<tr>
<td>Password:</td>
<td><input type="password" name="passwd"/></td></tr>
<tr>
<td colspan="2" align="center">
<input type="submit" value="Log in"/></td></tr>
<tr>
<td colspan="2"><a href="forgot_form.php">Forgot your password"post" action="register_new.php">
<table bgcolor="#cccccc">
<tr>
<td>Email address:</td>
<td><input type="text" name="email" size="30" maxlength="100"/></td></tr>
<tr>
<td>Preferred username <br />(max 16 chars):</td>
<td valign="top"><input type="text" name="username"
size="16" maxlength="16"/></td></tr>
<tr>
<td>Password <br />(between 6 and 16 chars):</td>
<td valign="top"><input type="password" name="passwd"
size="16" maxlength="16"/></td></tr>
<tr>
<td>Confirm password:</td>
<td><input type="password" name="passwd2" size="16" maxlength="16"/></td></tr>
<tr>
<td colspan=2 align="center">
<input type="submit" value="Register"></td></tr>
</table></form>
<"bm_table" action="delete_bms.php" method="post">
<table width="300" cellpadding="2" cellspacing="0">
<"#cccccc";
echo "<tr bgcolor=\"".$color."\"><td><strong>Bookmark</strong></td>";
echo "<td><strong>Delete";
if ((is_array($url_array)) && (count($url_array) > 0)) {
foreach ($url_array as $url) {
if ($color == "#cccccc") {
$color = "#ffffff";
} else {
$color = "#cccccc";
}
//remember to call htmlspecialchars() when we are displaying user data
echo "<tr bgcolor=\"".$color."\"><td><a href=\"".$url."\">".htmlspecialchars($url)."</a></td>
<td><input type=\"checkbox\" name=\"del_me[]\"
value=\"".$url."\"/></td>
</tr>";
}
} else {
echo "<tr><td>No bookmarks on record</td></tr>";
}
"member.php">Home</a> &nbsp;|&nbsp;
<a href="add_bm_form.php">Add BM</a> &nbsp;|&nbsp;
<"<a href=\"#\" onClick=\"bm_table.submit();\">Delete BM</a> &nbsp;|&nbsp;";
} else {
echo "<span style=\"color: #cccccc\">Delete BM</span> &nbsp;|&nbsp;";
}
"change_passwd_form.php">Change password</a>
<br />
<a href="recommend.php">Recommend URLs to me</a> &nbsp;|&nbsp;
<a href="logout.php">Logout</a>
<hr />
<"bm_table" action="add_bms.php" method="post">
<table width="250" cellpadding="2" cellspacing="0" bgcolor="#cccccc">
<tr><td>New BM:</td>
<td><input type="text" name="new_url" value="http://"
size="30" maxlength="255"/></td></tr>
<tr><td colspan="2" align="center">
<input type="submit" value="Add bookmark"/></td></tr>
</table>
</form>
<"change_passwd.php" method="post">
<table width="250" cellpadding="2" cellspacing="0" bgcolor="#cccccc">
<tr><td>Old password:</td>
<td><input type="password" name="old_passwd"
size="16" maxlength="16"/></td>
</tr>
<tr><td>New password:</td>
<td><input type="password" name="new_passwd"
size="16" maxlength="16"/></td>
</tr>
<tr><td>Repeat new password:</td>
<td><input type="password" name="new_passwd2"
size="16" maxlength="16"/></td>
</tr>
<tr><td colspan="2" align="center">
<input type="submit" value="Change password"/>
</td></tr>
</table>
<br />
<"forgot_passwd.php" method="post">
<table width="250" cellpadding="2" cellspacing="0" bgcolor="#cccccc">
<tr><td>Enter your username</td>
<td><input type="text" name="username" size="16" maxlength="16"/></td>
</tr>
<tr><td colspan=2 align="center">
<input type="submit" value="Change password"/>
</td></tr>
</table>
<br />
<"300" cellpadding="2" cellspacing="0">
<"#cccccc";
echo "<tr bgcolor=\"".$color."\">
<td><strong>Recommendations</strong></td></tr>";
if ((is_array($url_array)) && (count($url_array)>0)) {
foreach ($url_array as $url) {
if ($color == "#cccccc") {
$color = "#ffffff";
} else {
$color = "#cccccc";
}
echo "<tr bgcolor=\"".$color."\">
<td><a href=\"".$url."\">".htmlspecialchars($url)."</a></td></tr>";
}
} else {
echo "<tr><td>No recommendations for you today.</td></tr>";
}
"htmlcode">



// start session
session_start();
$old_user = $_SESSION['valid_user'];
unset($_SESSION['valid_user']);
$result_dest = session_destroy();
do_html_header('Logging out');
if (!empty($old_user)) {
if ($result_dest) {
echo 'Logged out.<br />';
do_html_url('login.php', 'Login');
}else {
echo 'Could not log you out.<br />';
}
}else {
echo 'You are not logged in ,so have not been logged out.<br />';
do_html_url('login.php', 'Login');
}
do_html_footer();
"htmlcode">



<"You have not filled the form out correctly - please go back and try again.", 1);
}
if (!valid_email($email)) { 
throw new Exception("That is not a valid email address - please go back and try again.", 1);
}
if ($passwd != $passwd2) { 
throw new Exception("The passwords you entered do not match - please go back and try again.", 1);
}
if ((strlen($passwd) < 6) || (strlen($passwd) > 16)) { 
throw new Exception("Your password must be between 6 and 16 characters - please go back and try again.", 1);
}
register($username, $passwd, $email);
$_SESSION['valid_user'] = $username;
do_html_header('Rigistration successful');
do_html_url('member.php', 'Go to members page');
do_html_footer();
} catch (Exception $e) {
do_html_header('Problem: ');
echo $e -> getMessage();
do_html_footer();
exit();
}
"htmlcode">



<"Your new password has been emailed to you.<br />";
}catch(Exception $e){
echo "Your password could not be reset - please try again later.";
}
do_html_url('login.php', 'Login');
do_html_footer();
"You have not filled the form out correctly - please go back and try again.", 1);
}
if ($new_passwd != $new_passwd2) { 
throw new Exception("The passwords you entered do not match - please go back and try again.", 1);
}
if ((strlen($new_passwd) < 6) || (strlen($new_passwd) > 16)) { 
throw new Exception("Your password must be between 6 and 16 characters - please go back and try again.", 1);
}
change_password($_SESSION['valid_user'], $old_passwd, $new_passwd2);
echo 'Password changed.';
}catch(Exception $e) {
echo $e -> getMessage();
}
display_user_menu(); 
do_html_footer();
"htmlcode">



<"Bookmark added";
if ($mks = get_user_urls($_SESSION['valid_user'])) {
display_user_urls($mks);
}
}catch(Exception $e) {
echo $e -> getMessage();
}
display_user_menu();
do_html_footer();
"htmlcode">



<"<p>You have not chosen any bookmarks to delete.<br />
Please try again.</p>";
display_user_menu();
do_html_footer();
exit;
}else {
if (count($del_me) > 0) {
foreach ($del_me as $url) {
if (delete_bm($valid_user, $url)) {
echo "Deleted ".htmlspecialchars($url)."<br />";
}else {
echo "Could not deleted ".htmlspecialchars($url)."<br />";
}
}
}else {
echo "No bookmarks selected for deletion.";
}
}
if ($mks = get_user_urls($_SESSION['valid_user'])) {
display_user_urls($mks);
}
display_user_menu();
do_html_footer();
"htmlcode">



<"htmlcode">



<"You could not be logged in. You must be logged in to view this page.";
do_html_url('login.php', 'Login');
do_html_footer();
exit;
}
}
do_html_header('Home');
check_valid_user();
if ($url_array = get_user_urls($_SESSION['valid_user'])) {
display_user_urls($url_array);
}
display_user_menu();
do_html_footer();
?>





以上所述是小编给大家介绍的PHP用户验证和标签推荐的简单使用，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！


                                

                                

                                     

                                

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一句话新闻
一口气升级7个大模型SaaS应用，百度智能云：突出一个“开箱即用” - 2024/9/24

这一波大模型产业落地浪潮里，不少企业其实处在 “干瞪眼“的状态。

一种情况是，很多大模型产品看得见却摸不着，在台上一个个遥遥领先——今天Sora技精四座，明天英伟达的机器人又赢得满堂彩，可是到了台下一问：啥时候能用上啊？答曰：遥遥无期。

另一种情况是，企业想用上大模型，却又难免瞻前顾后——既要考虑场景融合，又得兼顾安全性，还要考虑打通现有系统，再加上各种部署成本和繁琐的采购流程……最后只能拂袖：罢了，再等等吧。

                            
                        

                    

                

            

            
稳了！魔兽国服回归的3条重磅消息！官宣时间再确认！
昨天有一位朋友在大神群里分享，自己亚服账号被封号之后居然弹出了国服的封号信息对话框。
这里面让他访问的是一个国服的战网网址，com.cn和后面的zh都非常明白地表明这就是国服战网。
而他在复制这个网址并且进行登录之后，确实是网易的网址，也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情，因为以前都没有出现这样的情况，现在突然提示跳转到国服战网的网址，是不是说明了简体中文客户端已经开始进行更新了呢？

            

                

                    

                        

                            
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