PHP用户验证和标签推荐的简单使用
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2024-03-03 17:06:40
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
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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
bookmark_fns.php
<?php require_once('output_fns.php'); require_once('db_fns.php'); require_once('data_valid_fns.php'); require_once('url_fns.php'); require_once('user_auth_fns.php'); ?>
data_valid_fns.php
<?php // test that each variable has a value function filled_out($form_vars) { foreach ($form_vars as $key => $value) { if ((!isset($key)) || ($value == '')) { return false; } } return true; } // valid email function valid_email($address) { if (ereg('^[a-za-z0-9_\.\-]+@[a-za-z0-9\-]+\.[a-za-z0-9\-\.]+$', $address)) { return true; }else { return false; } } ?>
db_fns.php
<?php //conncet to db function db_connect() { $db = new mysqli('127.0.0.1', 'bm_user', 'password', 'bookmarks'); if (!$db) { throw new exception("could not connect to database server", 1); }else { return $db; } } ?>
user_auth_fns.php
<?php require_once('db_fns.php'); // register function register($username, $email, $password) { $conn = db_connect(); $results = $conn -> query("select * from user where username = '".$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, $from)) { return true; } else { throw new exception('could not send email.'); } } } ?>
url_fns.php
<?php require_once('db_fns.php'); // get user urls function get_user_urls($username) { $conn = db_connect(); $results = $conn -> query("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 $urls; } ?>
output_fns.php
<?php function do_html_header($title) { // print an html header ?> <html> <head> <title><?php echo $title;?></title> <style> body { font-family: arial, helvetica, sans-serif; font-size: 13px } li, td { font-family: arial, helvetica, sans-serif; font-size: 13px } hr { color: #3333cc; width=300; text-align=left} a { color: #000000 } </style> </head> <body> <img src="005.png" alt="phpbookmark logo" border="0" align="left" valign="bottom" height="55" width="57" /> <h1>phpbookmark</h1> <hr /> <?php if($title) { do_html_heading($title); } } function do_html_footer() { // print an html footer ?> </body> </html> <?php } function do_html_heading($heading) { // print heading ?> <h2><?php echo $heading;?></h2> <?php } function do_html_url($url, $name) { // output url as link and br ?> <br /><a href="<?php echo $url;?>"><?php echo $name;?></a><br /> <?php } function display_site_info() { // display some marketing info ?> <ul> <li>store your bookmarks online with us!</li> <li>see what other users use!</li> <li>share your favorite links with others!</li> </ul> <?php } function display_login_form() { ?> <p><a href="register_form.php">not a member?</a></p> <form method="post" action="member.php"> <table bgcolor="#cccccc"> <tr> <td colspan="2">members log in here:</td> <tr> <td>username:</td> <td><input type="text" name="username"/></td></tr> <tr> <td>password:</td> <td><input type="password" name="passwd"/></td></tr> <tr> <td colspan="2" align="center"> <input type="submit" value="log in"/></td></tr> <tr> <td colspan="2"><a href="forgot_form.php">forgot your password?</a></td> </tr> </table></form> <?php } function display_registration_form() { ?> <form method="post" action="register_new.php"> <table bgcolor="#cccccc"> <tr> <td>email address:</td> <td><input type="text" name="email" size="30" maxlength="100"/></td></tr> <tr> <td>preferred username <br />(max 16 chars):</td> <td valign="top"><input type="text" name="username" size="16" maxlength="16"/></td></tr> <tr> <td>password <br />(between 6 and 16 chars):</td> <td valign="top"><input type="password" name="passwd" size="16" maxlength="16"/></td></tr> <tr> <td>confirm password:</td> <td><input type="password" name="passwd2" size="16" maxlength="16"/></td></tr> <tr> <td colspan=2 align="center"> <input type="submit" value="register"></td></tr> </table></form> <?php } function display_user_urls($url_array) { // display the table of urls // set global variable, so we can test later if this is on the page global $bm_table; $bm_table = true; ?> <br /> <form name="bm_table" action="delete_bms.php" method="post"> <table width="300" cellpadding="2" cellspacing="0"> <?php $color = "#cccccc"; echo "<tr bgcolor=\"".$color."\"><td><strong>bookmark</strong></td>"; echo "<td><strong>delete?</strong></td></tr>"; if ((is_array($url_array)) && (count($url_array) > 0)) { foreach ($url_array as $url) { if ($color == "#cccccc") { $color = "#ffffff"; } else { $color = "#cccccc"; } //remember to call htmlspecialchars() when we are displaying user data echo "<tr bgcolor=\"".$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>"; } ?> </table> </form> <?php } function display_user_menu() { // display the menu options on this page ?> <hr /> <a href="member.php">home</a> | <a href="add_bm_form.php">add bm</a> | <?php // only offer the delete option if bookmark table is on this page global $bm_table; if ($bm_table == true) { echo "<a href=\"#\" onclick=\"bm_table.submit();\">delete bm</a> | "; } else { echo "<span style=\"color: #cccccc\">delete bm</span> | "; } ?> <a href="change_passwd_form.php">change password</a> <br /> <a href="recommend.php">recommend urls to me</a> | <a href="logout.php">logout</a> <hr /> <?php } function display_add_bm_form() { // display the form for people to ener a new bookmark in ?> <form name="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> <?php } function display_password_form() { // display html change password form ?> <br /> <form action="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 /> <?php } function display_forgot_form() { // display html form to reset and email password ?> <br /> <form action="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 /> <?php } function display_recommended_urls($url_array) { // similar output to display_user_urls // instead of displaying the users bookmarks, display recomendation ?> <br /> <table width="300" cellpadding="2" cellspacing="0"> <?php $color = "#cccccc"; echo "<tr bgcolor=\"".$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>"; } ?> </table> <?php } ?> login.php <?php require_once('bookmark_fns.php'); do_html_header(''); display_site_info(); display_login_form(); do_html_footer(); ?> logout.php <?php
require_once('bookmark_fns.php');
// 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(); ?>
register_form.php
<?php require_once('bookmark_fns.php'); do_html_header('user registration'); display_registration_form(); do_html_footer(); ?> register_new.php <?php require_once('bookmark_fns.php'); // vars $email = $_post['email']; $username = $_post['username']; $passwd = $_post['passwd']; $passwd2 = $_post['passwd2']; // start session session_start(); // valid data try { if (!filled_out($_post)) { throw new exception("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(); } ?>
forgot_form.php
<?php require_once('bookmark_fns.php'); do_html_header('reset password'); display_forgot_form(); do_html_footer(); ?> forgot_passwd.php <?php require_once('bookmark_fns.php'); do_html_header('resetting password'); $username = $_post['username']; try { // get random password $password = reset_password($username); notify_password($username, $password); echo "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(); ?> change_passwd_form.php <?php require_once('bookmark_fns.php'); session_start(); do_html_header('change password'); check_valid_user(); display_password_form(); display_user_menu(); do_html_footer(); ?> change_passed.php <?php require_once('bookmark_fns.php'); session_start(); do_html_header('changing password'); $old_passwd = $_post['old_passwd']; $new_passwd = $_post['new_passwd']; $new_passwd2 = $_post['new_passwd2']; try { check_valid_user(); if (!filled_out($_post)) { throw new exception("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(); ?> add_bm_form.php <?php // include function files for this application require_once('bookmark_fns.php'); session_start(); // start output html do_html_header('add bookmarks'); check_valid_user(); display_add_bm_form(); display_user_menu(); do_html_footer(); ?>
add_bms.php
<?php require_once('bookmark_fns.php'); session_start(); $new_url = $_post['new_url']; do_html_header('adding bookmarks'); try { check_valid_user(); if (!filled_out($_post)) { throw new exception('form not completely filled out.'); } if (strstr($new_url, 'http://') === false) { $new_url = 'http://'.$new_url; } // check url is valid if (!@fopen($new_url, 'r')) { throw new exception('not a valid url.'); } add_bm($new_url); echo "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(); ?>
delete_bms.php
<?php require_once('bookmark_fns.php'); session_start(); $del_me = $_post['del_me']; $valid_user = $_session['valid_user']; do_html_header('deleting bookmarks'); check_valid_user(); if (!filled_out($_post)) { echo "<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(); ?>
recommend.php
<?php require_once('bookmark_fns.php'); session_start(); do_html_header('recommending urls'); try { check_valid_user(); $urls = recommend_urls($_session['valid_user'], 1); display_recommended_urls($urls); }catch(exception $e) { echo $e -> getmessage(); } display_user_menu(); do_html_footer(); ?>
member.php
<?php require_once('bookmark_fns.php'); session_start(); @$username = $_post['username']; @$passwd = $_post['passwd']; if ($username && $passwd) { try { // log in login($username, $passwd); $_session['valid_user'] = $username; }catch(exception $e) { do_html_header('problem: '); echo "you could not be logged in. you must be logged in to view this page."; do_html_url('login.php', 'login'); do_html_footer(); exit; } } do_html_header('home'); check_valid_user(); if ($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
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