我会尽量做到简明扼要，但非常感谢任何帮助。我的 PHP/MySQL 技能水平略高于最低水平，因此我使用 Dreamweaver CS6 来尝试启动和运行我的网站。我需要能够限制从数据库返回给创建条目的用户的数据，所以我想重新使用登录信息来跟踪输入数据的人。
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}
$theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
mysql_select_db($database_DLP_RPG, $DLP_RPG);
$query_UserLoginForm = "SELECT * FROM users";
$UserLoginForm = mysql_query($query_UserLoginForm, $DLP_RPG) or die(mysql_error());
$row_UserLoginForm = mysql_fetch_assoc($UserLoginForm);
$totalRows_UserLoginForm = mysql_num_rows($UserLoginForm);
?>
<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
session_start();
}
$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
$_SESSION['PrevUrl'] = $_GET['accesscheck'];
}
if (isset($_POST['UserLogin'])) {
$loginUsername=$_POST['UserLogin'];
$password=$_POST['UserPass'];
$MM_fldUserAuthorization = "";
$MM_redirectLoginSuccess = "main.php";
$MM_redirectLoginFailed = "UserRegistration.php";
$MM_redirecttoReferrer = false;
mysql_select_db($database_DLP_RPG, $DLP_RPG);
$LoginRS__query=sprintf("SELECT user_login, user_pass FROM users WHERE user_login=%s AND user_pass=%s",
GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text"));
$LoginRS = mysql_query($LoginRS__query, $DLP_RPG) or die(mysql_error());
$loginFoundUser = mysql_num_rows($LoginRS);
if ($loginFoundUser) {
$loginStrGroup = "";
if (PHP_VERSION >= 5.1) {session_regenerate_id(true);} else {session_regenerate_id();}
//declare two session variables and assign them
$_SESSION['MM_Username'] = $loginUsername;
$_SESSION['MM_UserGroup'] = $loginStrGroup;
if (isset($_SESSION['PrevUrl']) && false) {
$MM_redirectLoginSuccess = $_SESSION['PrevUrl'];
}
header("Location: " . $MM_redirectLoginSuccess );
}
else {
header("Location: ". $MM_redirectLoginFailed );
}
}
?>
<!doctype html>
<html>
<head>
</head>
<body>
<div class="container">
<div class="header"><a href="#"><img src="" alt="Insert Logo Here" name="Insert_logo" width="180" height="90" id="Insert_logo" style="background-color: #C6D580; display:block;" /></a>
<!-- end .header --></div>
<div class="sidebar1">
<ul class="nav">
<li><a href="character_list.php">My Characters</a></li>
<li><a href="#">Link two</a></li>
<li><a href="#">Link three</a></li>
<li><a href="#">Link four</a></li>
</ul>
<form action="<?php echo $loginFormAction; ?>" method="POST" name="UserLoginForm" id="UserLoginForm">
<table width="200" border="1">
<tr>
<td>Username:</td>
</tr>
<tr>
<td><label for="UserLogin"></label>
<input name="UserLogin" type="text" id="UserLogin" size="28"></td>
</tr>
<tr>
<td>Password:</td>
</tr>
<tr>
<td><span id="sprypassword1">
<label for="UserPass"></label>
<input name="UserPass" type="password" id="UserPass" size="28">
<span class="passwordRequiredMsg">A value is required.</span></span></td>
</tr>
<tr>
<td><input type="submit" name="UserLoginSubmit" id="UserLoginSubmit" value="Submit"></td>
</tr>
</table><input name="user_status" type="hidden" value="">
</form>
<p> </p>
<p><a href="UserRegistration.php">Register</a></p>
<!-- end .sidebar1 --></div>
<div class="content">
<h1>Please login to proceed</h1>
<p>This is a testing site only, no guarantees of security so watch yourself</p>
<!-- end .content --></div>
<div class="footer">
<p>This .footer contains the declaration position:relative; to give Internet Explorer 6 hasLayout for the .footer and cause it to clear correctly. If you're not required to support IE6, you may remove it.</p>
<!-- end .footer --></div>
<!-- end .container --></div>
</body>
</html>
<?php
mysql_free_result($UserLoginForm);
?>
所以上面就是登录信息了。数据库是 rpg_test，表是用户，我要查找的相关字段是 user_id 和 user_login。如您所料，user_id 是一个整数主键，user_login 是字母数字用户名。该页面使用它来登录其他页面，并且似乎保留了一个包含有效用户名的变量。
这是已经登录的用户页面之一的示例:
<?php require_once('Connections/DLP_RPG.php'); ?>
<?php
//initialize the session
if (!isset($_SESSION)) {
session_start();
}
// ** Logout the current user. **
$logoutAction = $_SERVER['PHP_SELF']."?doLogout=true";
if ((isset($_SERVER['QUERY_STRING'])) && ($_SERVER['QUERY_STRING'] != "")){
$logoutAction .="&". htmlentities($_SERVER['QUERY_STRING']);
}
if ((isset($_GET['doLogout'])) &&($_GET['doLogout']=="true")){
//to fully log out a visitor we need to clear the session varialbles
$_SESSION['MM_Username'] = NULL;
$_SESSION['MM_UserGroup'] = NULL;
$_SESSION['PrevUrl'] = NULL;
unset($_SESSION['MM_Username']);
unset($_SESSION['MM_UserGroup']);
unset($_SESSION['PrevUrl']);
$logoutGoTo = "index.php";
if ($logoutGoTo) {
header("Location: $logoutGoTo");
exit;
}
}
?>
<?php
if (!isset($_SESSION)) {
session_start();
}
$MM_authorizedUsers = "0";
$MM_donotCheckaccess = "true";
// *** Restrict Access To Page: Grant or deny access to this page
function isAuthorized($strUsers, $strGroups, $UserName, $UserGroup) {
// For security, start by assuming the visitor is NOT authorized.
$isValid = False;
// When a visitor has logged into this site, the Session variable MM_Username set equal to their username.
// Therefore, we know that a user is NOT logged in if that Session variable is blank.
if (!empty($UserName)) {
// Besides being logged in, you may restrict access to only certain users based on an ID established when they login.
// Parse the strings into arrays.
$arrUsers = Explode(",", $strUsers);
$arrGroups = Explode(",", $strGroups);
if (in_array($UserName, $arrUsers)) {
$isValid = true;
}
// Or, you may restrict access to only certain users based on their username.
if (in_array($UserGroup, $arrGroups)) {
$isValid = true;
}
if (($strUsers == "") && true) {
$isValid = true;
}
}
return $isValid;
}
$MM_restrictGoTo = "index.php";
if (!((isset($_SESSION['MM_Username'])) && (isAuthorized("",$MM_authorizedUsers, $_SESSION['MM_Username'], $_SESSION['MM_UserGroup'])))) {
$MM_qsChar = "?";
$MM_referrer = $_SERVER['PHP_SELF'];
if (strpos($MM_restrictGoTo, "?")) $MM_qsChar = "&";
if (isset($_SERVER['QUERY_STRING']) && strlen($_SERVER['QUERY_STRING']) > 0)
$MM_referrer .= "?" . $_SERVER['QUERY_STRING'];
$MM_restrictGoTo = $MM_restrictGoTo. $MM_qsChar . "accesscheck=" . urlencode($MM_referrer);
header("Location: ". $MM_restrictGoTo);
exit;
}
?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}
$theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
mysql_select_db($database_DLP_RPG, $DLP_RPG);
$query_UserLoginForm = "SELECT * FROM users";
$UserLoginForm = mysql_query($query_UserLoginForm, $DLP_RPG) or die(mysql_error());
$row_UserLoginForm = mysql_fetch_assoc($UserLoginForm);
$totalRows_UserLoginForm = mysql_num_rows($UserLoginForm);
mysql_select_db($database_DLP_RPG, $DLP_RPG);
$query_PlaySystem = "SELECT play_systems.play_system FROM play_systems";
$PlaySystem = mysql_query($query_PlaySystem, $DLP_RPG) or die(mysql_error());
$row_PlaySystem = mysql_fetch_assoc($PlaySystem);
$totalRows_PlaySystem = mysql_num_rows($PlaySystem);
mysql_select_db($database_DLP_RPG, $DLP_RPG);
$query_characters = "SELECT * FROM characters WHERE characters.character_owner";
$characters = mysql_query($query_characters, $DLP_RPG) or die(mysql_error());
$row_characters = mysql_fetch_assoc($characters);
$totalRows_characters = mysql_num_rows($characters);
?>
<!doctype html>
<html>
<head>
</head>
<body>
<div class="container">
<div class="header"><a href="#"><img src="" alt="Insert Logo Here" name="Insert_logo" width="180" height="90" id="Insert_logo" style="background-color: #C6D580; display:block;" /></a>
<!-- end .header --></div>
<div class="sidebar1">
<ul class="nav">
<li><a href="#">My Characters</a></li>
<li><a href="new_character1.php">New Character</a></li>
<li><a href="#">Link three</a></li>
<li><a href="#">Link four</a></li>
</ul>
<p><a href="<?php echo $logoutAction ?>">Logout</a></p><br> I should come up with a way to show this only if you're logged in<br>
<!-- end .sidebar1 --></div>
<div class="content">
<h1>List of characters</h1>
<p>This page should list all of your characters, and just your characters.</p>
<p>Edit and delete buttons should be included.</p>
<p> </p>
<table border="1">
<tr>
<td>Name:</td>
<td>Type:</td>
<td>System:</td>
<td>Owner:</td>
</tr>
<?php do { ?>
<tr>
<td><?php echo $row_characters['character_name1']; ?></td>
<td><?php echo $row_characters['character_occupation']; ?></td>
<td><?php echo $row_characters['play_system']; ?></td>
<td><?php echo $row_characters['character_owner']; ?></td>
</tr>
<?php } while ($row_characters = mysql_fetch_assoc($characters)); ?>
</table>
<!-- end .content --></div>
</body>
</html>
<?php
mysql_free_result($UserLoginForm);
mysql_free_result($PlaySystem);
mysql_free_result($characters);
?>
我想要做的是在显示字符的 html 表中有“所有者”字段，将只显示创建它们的人所拥有的字符。理想情况下，我会将 user_id 字段限制为等于登录跟踪用于访问页面的任何内容。我猜它是某种持久变量，我希望在更新表时可以调用它并将其作为数据插入。
有这样的变数吗？我一直看到 $UserName 和其他东西，但也许我在兜圈子。任何帮助将不胜感激。
编辑:根据我在网站上找到的内容，我需要使用 session 变量。
我对其中一个页面执行了 print_r($SESSION)，它给出了:
Array ( [PrevUrl] =>/rpg/character_list.php [MM_Username] => joecook [MM_UserGroup] => )
MM-Username 的登录名适合我的 user_login 字段，但下表显示该表使用的字段是 user_id。我以 user_id=2 登录，我只想查看与我相关的条目。
<table border="1">
<tr>
<td>Name:</td>
<td>Type:</td>
<td>System:</td>
<td>Owner:</td>
</tr>
<tr>
<td>Fuzz Duck</td>
<td>1</td>
<td>Palladium Megaverse</td>
<td>1</td>
</tr>
<tr>
<td>another heresy test for owner</td>
<td>17</td>
<td>Heresy Game Engine</td>
<td>2</td>
</tr>
<tr>
<td>Another Heresy test</td>
<td>17</td>
<td>Heresy Game Engine</td>
<td>2</td>
</tr>
</table>
如果有帮助，这是用数据填充上表的以前的表单:
<div class="content">
<h1>Starting a new character</h1>
<p>The first thing to do when starting a new character is to select the play system from a drop down list</p>
<form action="<?php echo $editFormAction; ?>" method="POST" name="PlaySystemForm" id="PlaySystemForm">
<table width="500" border="1">
<tr>
<th width="129" scope="row">System:</th>
<td width="355"><label for="play_system2"></label>
<select name="play_system" id="play_system2">
<?php
do {
?>
<option value="<?php echo $row_PlaySystem['play_system']?>"><?php echo $row_PlaySystem['play_system']?></option>
<?php
} while ($row_PlaySystem = mysql_fetch_assoc($PlaySystem));
$rows = mysql_num_rows($PlaySystem);
if($rows > 0) {
mysql_data_seek($PlaySystem, 0);
$row_PlaySystem = mysql_fetch_assoc($PlaySystem);
}
?>
</select></td>
</tr>
<tr>
<th scope="row">Name:</th>
<td><span id="sprytextfield1">
<label for="character_name"></label>
<input name="character_name" type="text" id="character_name" size="25" maxlength="128">
<span class="textfieldRequiredMsg">A value is required.</span><span class="textfieldMinCharsMsg">Minimum number of characters not met.</span><span class="textfieldMaxCharsMsg">Exceeded maximum number of characters.</span></span></td>
</tr>
<tr>
<th scope="row">Type:</th>
<td><label for="character_type1"></label>
<select name="character_type1" id="character_type1">
<?php
do {
?>
<option value="<?php echo $row_character_type['character_type1_id']?>"<?php if (!(strcmp($row_character_type['character_type1_id'], $row_PlaySystem['play_system']))) {echo "selected=\"selected\"";} ?>><?php echo $row_character_type['character_type1']?></option>
<?php
} while ($row_character_type = mysql_fetch_assoc($character_type));
$rows = mysql_num_rows($character_type);
if($rows > 0) {
mysql_data_seek($character_type, 0);
$row_character_type = mysql_fetch_assoc($character_type);
}
?>
</select></td>
</tr>
</table>
<input name="CharacterOwner" type="hidden" id="CharacterOwner" value="<?php echo $row_UserLoginForm['user_id']; ?>">
<p>
<input type="submit" name="NewCharacterSubmit" id="NewCharacterSubmit" value="Create character">
</p>
<input type="hidden" name="MM_insert" value="PlaySystemForm">
</form>
最佳答案
您需要在查询中添加一个条件，即。
WHERE characters.character_owner = users.user_id
由于您只存储了 user_login/($_SESSION['MM_Username']) 而不是 user_id，您需要使用子查询获取 user_id。尝试改变 -
$query_characters = "SELECT * FROM characters WHERE characters.character_owner";
到
$query_characters = "SELECT * FROM characters WHERE characters.character_owner =
(SELECT user_id FROM users WHERE user_login = '{$_SESSION['MM_Username']}')";
用户登录
关于php - 尝试使用 MySQL 字段作为数据的限制，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30430953/
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