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
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=\"".$url."\"/></td> </tr>"; } } else { echo "<tr><td>No bookmarks on record</td></tr>"; } "member.php">Home</a> | <a href="add_bm_form.php">Add BM</a> | <"<a href=\"#\" onClick=\"bm_table.submit();\">Delete BM</a> | "; } else { echo "<span style=\"color: #cccccc\">Delete BM</span> | "; } "change_passwd_form.php">Change password</a> <br /> <a href="recommend.php">Recommend URLs to me</a> | <a href="logout.php">Logout</a> <hr /> <"bm_table" action="add_bms.php" method="post"> <table width="250" cellpadding="2" cellspacing="0" bgcolor="#cccccc"> <tr><td>New BM:</td> <td><input type="text" name="new_url" value="http://" size="30" maxlength="255"/></td></tr> <tr><td colspan="2" align="center"> <input type="submit" value="Add bookmark"/></td></tr> </table> </form> <"change_passwd.php" method="post"> <table width="250" cellpadding="2" cellspacing="0" bgcolor="#cccccc"> <tr><td>Old password:</td> <td><input type="password" name="old_passwd" size="16" maxlength="16"/></td> </tr> <tr><td>New password:</td> <td><input type="password" name="new_passwd" size="16" maxlength="16"/></td> </tr> <tr><td>Repeat new password:</td> <td><input type="password" name="new_passwd2" size="16" maxlength="16"/></td> </tr> <tr><td colspan="2" align="center"> <input type="submit" value="Change password"/> </td></tr> </table> <br /> <"forgot_passwd.php" method="post"> <table width="250" cellpadding="2" cellspacing="0" bgcolor="#cccccc"> <tr><td>Enter your username</td> <td><input type="text" name="username" size="16" maxlength="16"/></td> </tr> <tr><td colspan=2 align="center"> <input type="submit" value="Change password"/> </td></tr> </table> <br /> <"300" cellpadding="2" cellspacing="0"> <"#cccccc"; echo "<tr bgcolor=\"".$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！
标签：php,验证和标签推荐
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3月20日消息，近期博主@数码闲聊站 透露，原定三月份发布的华为新旗舰P70系列延期发布，预计4月份上市。
而博主@定焦数码 爆料，华为的P70系列在定位上已经超过了Mate60，成为了重要的旗舰系列之一。它肩负着重返影像领域顶尖的使命。那么这次P70会带来哪些令人惊艳的创新呢？
根据目前爆料的消息来看，华为P70系列将推出三个版本，其中P70和P70 Pro采用了三角形的摄像头模组设计，而P70 Art则采用了与上一代P60 Art相似的不规则形状设计。这样的外观是否好看见仁见智，但辨识度绝对拉满。