我在为会话用户创建变量时遇到问题。我正在创建一个练习拳击网站，它将会话用户与具有相同属性的人匹配，即权重
<?php
session_start();
include "connection.php";
$id = $_GET["userID"];
$sql = "SELECT * FROM userdetails WHERE userID = '" . $id . "'";
$result = mysqli_query($con, $sql);
if (mysqli_num_rows($result) > 0) {
while ($row = mysqli_fetch_assoc($result)) {
echo"<div>" .
"<br>First name: " . $row["firstname"] .
"<br>Second name: " . $row["secondname"] .
"<br>Mobile: " . $row["mobile"] .
"<br>Height: " . $row["height"] . "CM" .
"<br>weight: " . $row["weight"] . "KG" .
"<br>Image:<br> <img src=getimage.php?
userID=" . $row["userID"] . "width=100, height=100" .
"<br> You are a match! click below to view events" .
"<br><a href=Events.php?userID=" . $row["userID"] . ">View
Events</a>" .
"</div>";
}
} else {
echo"0 results";
}
$weight = $row['weight'];
?>
此代码允许我收集并显示表格中个人的数据，$ weight = $ row ['weight']; line将个人的权重放入变量中。
我不确定如何将会话用户权重转换为变量，然后如何比较两者。我想我需要一份IF声明。类似的东西：
if ($weight == $sessionusersweight){
echo "you're a match";
}
else{
echo "you're not a match";
}
任何帮助将不胜感激
答案 0 :(得分：0)
我建议首先使用先打开：
<header>
<link href="https://fonts.googleapis.com/css?family=Black+Han+Sans" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Gugi" rel="stylesheet">
</header>
<body class="boDy">
<div class="myDiv">
<div class="bg"></div>
<h1 class="myfont2 text-center"> <span style="color:purple">T.E.Q</span>
<span style="color:green">MOLECULE</span> MEDIA</h1>
</div>
<nav id="nav-example" class="navbar navbar-inverse bg-dark affix sticky" data-target-offset="18">
<a class="navbar-brand myfont" href="#">TEQ Molecule</a>
<ul class="nav nav-pills">
<li class="nav-item">
<a class="nav-link" href="#Portfolio">Portfolio</a>
</li>
<li class="nav-item">
<a class="nav-link " href="#About">About</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu">
<a class="dropdown-item" href="#Contact">Contact</a>
</li>
</div>
</ul>
</nav>
<div class="bckground">
<div class="bb1"></div>
<br></br>
<br></br>
<br></br>
<div id="#scroller" data-spy="scroll" data-target="#nav-example" data-offset="10">
<div class="myfont2" id="About" style="left:20px">
<br></br>
<h3>ABOUT T.E.Q</h3>
</div>
<img class="smallerImage"style="margin-left:20px"src="http://farm1.staticflickr.com/860/40814758834_31a56037fb_b.jpg" alt="about TEQ">
<br></br>
<br></br>
<div class="divider"></div>
<br></br>
<div id="Portfolio" class="myfont2">
<br></br>
<h3>PORTFOLIO</h3>
</div>
<br></br>
<div class="row">
<div class="col-md-4">
<a href="#"> <img class="thumbnail imgCenter" src="http://farm1.staticflickr.com/842/41527921141_e5c1bdbd42_b.jpg" alt="graphic arts"></a>
<p class="text-center myfont"> GRAPHIC DESIGN</p>
</div>
<div class="col-md-4">
<a href="#"> <img class="thumbnail imgCenter" src="https://f9tech.com/wp-content/uploads/2018/02/dev-1.jpg" alt="web deveopment"></a>
<p class="text-center myfont"> WEB DEVELOPMENT</p>
</div>
<div class="col-md-4">
<a href="#"><img class="thumbnail imgCenter" align="center" src="https://scontent.fbgi2-1.fna.fbcdn.net/v/t1.0-9/25299007_1255958357881913_5312854462633629399_n.jpg?_nc_cat=0&oh=0c924733b42ea92b9916ab8576192094&oe=5B59AE75" alt="digital marketing"></a>
<p class="text-center myfont">DIGITAL MARKETING</p>
</div>
</div>
<br></br>
<div class="divider2"></div>
</div>
</div>
</body>
然后插入所需的所有代码，一旦完成，您需要的是将行的值赋给变量，这样您就可以执行此操作：
<?php
session_start()
?>
答案 1 :(得分：0)
因此，您的会话中有一位用户。如果是这样，那么您可以从$_SESSION变量中获取该用户。
要在会话中存储数据，您可以执行以下操作：
<?php
session_start();
$_SESSION['user'] = $row;
现在，您将$_SESSION变量中的行数据作为user索引。
要从$_SESSION变量中获取用户，您可以执行以下操作：
<?php
session_start();
$sessionUser = $_SESSION['user'];
此处，session_start()方法用于启动会话。这在同一文件中不需要两次。
然后您可以根据需要进行检查：
<?php
if($row["weight"] == $sessionUser['weight'])
echo "matched";
else
echo "not matched";
答案 2 :(得分：0)
我已经让你成为我认为你想要的东西（这不是太明显）的版本。
<?php
session_start();
include "connection.php";
$id = $_GET["userID"]; // SANITISE USER INPUT!!!
// change that to a prepared statement!! This is unsecure.
$sql = "SELECT * FROM userdetails WHERE userID = '" . $id . "'";
$result = mysqli_query($con, $sql);
if (mysqli_num_rows($result) == 1) {
$row = mysqli_fetch_assoc($result); // no need for a while there, we expect only one row
echo "<div>" .
"<br>First name: " . $row["firstname"] .
"<br>Second name: " . $row["secondname"] .
"<br>Mobile: " . $row["mobile"] .
"<br>Height: " . $row["height"] . "CM" .
"<br>weight: " . $row["weight"] . "KG" .
"<br>Image:<br> <img src=getimage.php?
userID=" . $row["userID"] . "width=100, height=100" .
"<br> You are a match! click below to view events" .
"<br><a href=Events.php?userID=" . $row["userID"] . ">View
Events</a>" .
"</div>";
// find users with the same weight;
$findSimularity = 'weight'; // having weight as a var keeps it more modular/reuseable
$stmt = mysqli_prepare($con, "SELECT * FROM userdetails WHERE `{$findSimularity}` = ?");
mysqli_stmt_bind_param($stmt,"d", $row[$findSimularity]); // I assumed type double for weight here.
//Could also be 'i' for int or 's' for a string/varchar. ?
mysqli_execute($stmt);
$result = mysqli_stmt_get_result($stmt);
echo "Similar Users:<br>";
while($similarUser = mysqli_fetch_assoc($result)) {
echo $similarUser['firstname'] . " has the same $findSimularity of ".$row[$findSimularity]."<br>";
}
} elseif (mysqli_num_rows($result) > 1) {
echo "I found more than one user with given ID. That should be an error.";
} else {
echo "0 results";
}
// best practice is to NOT have a final ?> in your files (to avoid some strange hard to find errors), so I removed it