blocks|key|2367985|text|您必须记住准备查询并将参数绑定到它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2367986|使用$id变量准备具有适当ID的查询。|offset|length|style|CODE|2367987|在将ID传递给查询之前，请确保对会话进行身份验证，否则攻击者可以操纵此数据以获取任何他们想要的数据。|2367988|//+Its+helpful+to+create+elements+within+the+code+to+bind+onto.+:id+is+ours.
$query+=+"UPDATE+nameOfTable+SET+datetime+=+NOW()+WHERE+id+=+:id+";

$d+=+$conn->prepare($query);

//+Run+the+query+&+bind+id+to+:id
$d->execute(['id'+=>+$id]);+|code-block|syntax|javascript|2367989|entityMap^0|0|2|3|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|V|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

<p>You must remember to prepare the query and bind the parameters onto it.</p>
<p>Use the <code>$id</code> variable to prepare the query with the appropriate ID.</p>
<p>Make sure you authenticate the session before passing the ID to the query, otherwise an attacker can manipulate this data to pull anyone's data they wish.</p>
<pre><code>// Its helpful to create elements within the code to bind onto. :id is ours.
$query = &quot;UPDATE nameOfTable SET datetime = NOW() WHERE id = :id &quot;;

$d = $conn-&gt;prepare($query);

// Run the query &amp; bind id to :id
$d-&gt;execute(['id' =&gt; $id]); 
</code></pre>


blocks|key|3604580|text|你试着更新|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3604581|++++$query+=+"UPDATE+nameOfTable+SET+datetime+=+NOW()+WHERE+id+=+:id+";

++++$d+=+$conn->prepare($query);

++++$d->execute(['id'+=>+$id+]);+++++|code-block|syntax|javascript|3604582|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>You try update</p>
<pre><code>    $query = &quot;UPDATE nameOfTable SET datetime = NOW() WHERE id = :id &quot;;

    $d = $conn-&gt;prepare($query);

    $d-&gt;execute(['id' =&gt; $id ]);     
</code></pre>


blocks|key|257074|text|使用$conn->lastInsertId()获取当它们进入时分配的ID。将其保存在会话变量中，并在它们超时时使用它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|257075|<?php

require_once+'./dba.php';

$status+=+"";

if(isset($_POST['time_in']))+{
++++$query+=+"INSERT+INTO+nameOfTable+(datetime)+VALUES+(NOW())";
++++$d+=+$conn->prepare($query);
++++$d->execute();+++++
++++$_SESSION['clock_id']+=+$conn->lastInsertId();
}+elseif(isset($_POST['time_out']))+{
++++if+(!isset($_SESSION['clock_id']))+{
++++++$status+=+"You+need+to+clock+in+first!";
++++}+else+{
++++++$query+=+"UPDATE+nameOfTable+SET+datetime+=+NOW()+WHERE+id+=+:id+";
++++++$d+=+$conn->prepare($query);
++++++$d->execute(['id'+=>+$_SESSION['clock_id']]);+++
++++}
}+else+{
++++$status+=+"Can't+time+in!";
}|code-block|syntax|javascript|257076|entityMap^0|2|L|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

<p>Use <code>$conn-&gt;lastInsertId()</code> to get the ID that was assigned when they clocked in. Save that in a session variable and use it when they clock out.</p>
<pre><code>&lt;?php

require_once './dba.php';

$status = &quot;&quot;;

if(isset($_POST['time_in'])) {
    $query = &quot;INSERT INTO nameOfTable (datetime) VALUES (NOW())&quot;;
    $d = $conn-&gt;prepare($query);
    $d-&gt;execute();     
    $_SESSION['clock_id'] = $conn-&gt;lastInsertId();
} elseif(isset($_POST['time_out'])) {
    if (!isset($_SESSION['clock_id'])) {
      $status = &quot;You need to clock in first!&quot;;
    } else {
      $query = &quot;UPDATE nameOfTable SET datetime = NOW() WHERE id = :id &quot;;
      $d = $conn-&gt;prepare($query);
      $d-&gt;execute(['id' =&gt; $_SESSION['clock_id']]);   
    }
} else {
    $status = &quot;Can't time in!&quot;;
}
</code></pre>


<p>I am working on a project that takes students attendance in class and I want to update the database data through PHP whilst running a SQL function of UPDATE, but I want to be able to update it base on the id of the data.</p>
<p>This is the code that I am working with at the moment.</p>
<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;?php

require_once './dba.php';

$status = "";

if(isset($_POST['time_in'])) {

    $query = "INSERT INTO nameOfTable (datetime) VALUES (NOW())";

    $d = $conn-&gt;prepare($query);

    $d-&gt;execute();     

} elseif(isset($_POST['time_out'])) {
    $query = "UPDATE nameOfTable SET datetime = NOW() WHERE id = ? ";

    $d = $conn-&gt;prepare($query);

    $d-&gt;execute();     
} else {
    $status = "Can't time in!";
}</code></pre>
</div>
</div>
</p>


php - Updating data in database base on id?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

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我正在做一个让学生上课的项目，我想通过PHP更新数据库数据，同时运行一个SQL函数UPDATE，但是我希望能够根据数据的id来更新它。这是我目前正在使用的代码。​<?phprequire_once './dba.php';$status = "";if(isset($_POST['time_in'])) {    $q...

问php -基于id更新数据库中的数据？
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