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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<?phprequire_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
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<?php// test that each variable has a valuefunction filled_out($form_vars) {foreach ($form_vars as $key => $value) {if ((!isset($key)) || ($value == '')) {return false;} } return true;}// valid emailfunction valid_email($address) {if (ereg('^[a-za-z0-9_\.\-]+@[a-za-z0-9\-]+\.[a-za-z0-9\-\.]+$', $address)) {return true;}else {return false;}}?> |
db_fns.php
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<?php//conncet to db function db_connect() {$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 $db;}}?> |
user_auth_fns.php
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<?phprequire_once('db_fns.php');// register function register($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, $rand_location);// get the next whole word of the right length in the filewhile ((strlen($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 fgetsreturn $word;}function reset_password($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 = $conn->query("update userset passwd = sha1('".$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 = $conn->query("select email from userwhere username='".$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, $from)) {return true;} else {throw new exception('could not send email.');}}}?> |
url_fns.php
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<?phprequire_once('db_fns.php');// get user urlsfunction get_user_urls($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 $url_array;}// add url to dbfunction add_bm($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;$query = "select bm_urlfrom bookmarkwhere username in(select distinct(b2.username)from bookmark b1, bookmark b2where b1.username='".$valid_user."'and b1.username != b2.usernameand b1.bm_url = b2.bm_url)and bm_url not in(select bm_urlfrom bookmarkwhere username='".$valid_user."')group by bm_urlhaving count(bm_url)>".$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 urlsfor ($count=0; $row = $result->fetch_object(); $count++) {$urls[$count] = $row->bm_url;}return $urls;}?> |
output_fns.php
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<?phpfunction do_html_header($title) {// print an html header?><html><head><title><?php echo $title;?></title><style>body { font-family: arial, helvetica, sans-serif; font-size: 13px }li, td { font-family: arial, helvetica, sans-serif; font-size: 13px }hr { color: #3333cc; width=300; text-align=left}a { color: #000000 }</style></head><body><img src="005.png" alt="phpbookmark logo" border="0"align="left" valign="bottom" height="55" width="57" /><h1>phpbookmark</h1><hr /><?phpif($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 pageglobal $bm_table;$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 dataecho "<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 pageglobal $bm_table;if ($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($url)."</a></td></tr>";}} else {echo "<tr><td>no recommendations for you today.</td></tr>";}?></table><?php}?>login.php<?phprequire_once('bookmark_fns.php');do_html_header('');display_site_info();display_login_form();do_html_footer();?>logout.php<?php |
require_once('bookmark_fns.php');
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// start sessionsession_start();$old_user = $_session['valid_user'];unset($_session['valid_user']);$result_dest = session_destroy();do_html_header('logging out');if (!empty($old_user)) {if ($result_dest) {echo 'logged out.<br />';do_html_url('login.php', 'login');}else {echo 'could not log you out.<br />';}}else {echo 'you are not logged in ,so have not been logged out.<br />';do_html_url('login.php', 'login');}do_html_footer();?> |
register_form.php
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<?phprequire_once('bookmark_fns.php');do_html_header('user registration');display_registration_form();do_html_footer();?>register_new.php<?phprequire_once('bookmark_fns.php');// vars$email = $_post['email'];$username = $_post['username'];$passwd = $_post['passwd'];$passwd2 = $_post['passwd2'];// start sessionsession_start();// valid data try {if (!filled_out($_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 $e -> getmessage();do_html_footer();exit();}?> |
forgot_form.php
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<?phprequire_once('bookmark_fns.php');do_html_header('reset password');display_forgot_form();do_html_footer();?>forgot_passwd.php<?phprequire_once('bookmark_fns.php');do_html_header('resetting password');$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 $e){echo "your password could not be reset - please try again later.";}do_html_url('login.php', 'login');do_html_footer();?>change_passwd_form.php<?phprequire_once('bookmark_fns.php');session_start();do_html_header('change password');check_valid_user();display_password_form();display_user_menu(); do_html_footer();?>change_passed.php<?phprequire_once('bookmark_fns.php');session_start();do_html_header('changing password');$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 $e -> getmessage();}display_user_menu(); do_html_footer();?>add_bm_form.php<?php// include function files for this applicationrequire_once('bookmark_fns.php');session_start();// start output htmldo_html_header('add bookmarks');check_valid_user();display_add_bm_form();display_user_menu();do_html_footer();?> |
add_bms.php
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<?phprequire_once('bookmark_fns.php');session_start();$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://'.$new_url;} // check url is validif (!@fopen($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 $e -> getmessage();}display_user_menu();do_html_footer();?> |
delete_bms.php
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<?phprequire_once('bookmark_fns.php');session_start();$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
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<?phprequire_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 $e -> getmessage();}display_user_menu();do_html_footer();?> |
member.php
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<?phprequire_once('bookmark_fns.php');session_start();@$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，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服务器之家网站的支持！
原文链接：http://www.jianshu.com/p/2b7ff04b589a
