blocks|key|2532612|text|您需要从$_POST变量中收集这些值，并将它们传递给函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2532613|if+($_POST)+{
++$number_1+=+(int)+$_POST['number1'];
++$number_2+=+(int)+$_POST['number2'];
++echo+addNumbers($number_1,+$number_2);
}|code-block|syntax|javascript|2532614|但是，需要注意的是，您不应该信任用户输入，因此需要验证和清理您的输入。|2532615|entityMap^0|4|6|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

You need to gather the values from the <code>$_POST</code> variable and pass them into the function.

<pre><code>if ($_POST) {
 $number_1 = (int) $_POST['number1'];
 $number_2 = (int) $_POST['number2'];
 echo addNumbers($number_1, $number_2);
}
</code></pre>

Be advised, however, that you shouldn't trust user input and thus need to validate and sanitize your input.

blocks|key|50068|text|这些变量将位于$_POST变量中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|50069|要将其解析为函数，您需要执行以下操作：|50070|addNumbers($_POST['number1'],$_POST['number2']);|code-block|syntax|javascript|50071|一定要检查输入，用户可以在其中添加任何他们想要的内容。例如，使用is_numeric()函数|50072|$number1+=+is_numeric($_POST['number1'])+?+$_POST['number1']+:+0;|50073|另外，不要在函数内部回显，最好返回它：|50074|function+addNumbers($firstNumber,+$secondNumber)
{
++++return+$firstNumber+%2B+$secondNumber;
}

//+check+if+$_POST+is+set
if+(isset($_POST['number1'])+&&+isset($_POST['number2']))
{
++++$number1+=+is_numeric($_POST['number1'])+?+$_POST['number1']+:+0;
++++$number2+=+is_numeric($_POST['number2'])+?+$_POST['number2']+:+0;

++++echo+addNumbers($_POST['number1'],$_POST['number2']);
}|50075|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

The variables will be in the $_POST variable.

To parse it to the function you need to do this:

<pre><code>addNumbers($_POST['number1'],$_POST['number2']);
</code></pre>

Be sure you check the input, users can add whatever they want in it. For example use is_numeric() function

<pre><code>$number1 = is_numeric($_POST['number1']) ? $_POST['number1'] : 0;
</code></pre>

Also, don't echo inside a function, better return it:

<pre><code>function addNumbers($firstNumber, $secondNumber)
{
 return $firstNumber + $secondNumber;
}

// check if $_POST is set
if (isset($_POST['number1']) &amp;&amp; isset($_POST['number2']))
{
 $number1 = is_numeric($_POST['number1']) ? $_POST['number1'] : 0;
 $number2 = is_numeric($_POST['number2']) ? $_POST['number2'] : 0;

 echo addNumbers($_POST['number1'],$_POST['number2']);
}
</code></pre>

blocks|key|2742547|text|您拥有的“功能”是服务器端。服务器端代码在将数据返回到浏览器(通常显示为页面，但也可以是ajax+request)之前运行。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2742548|您拥有的表单是客户端。此表单由您的浏览器呈现，并不“连接”到您的服务器，但可以。|2742549|因此，要运行该函数，必须执行以下流程：|2742550|2742551|服务器输出带有表单的页面。无需进行服务器端处理即可加载该页并显示表单。|ordered-list-item|2742552|用户在表单中键入数据。|2742553|用户按下提交按钮后，将向您的服务器创建包含数据的HTTP+request。|2742554|处理请求的页(可以与第一个请求相同)从请求中提取数据，运行您的函数，然后将结果输出到HTML页。<代码>H221<代码>G222|2742555|2742556|下面是一个示例PHP脚本，它可以完成所有这些任务：|2742557|<?php

function+addNumbers($firstNumber,+$secondNumber)+{
++++return+$firstNumber+%2B+$secondNumber;
}

if+(isset($_POST['number1'])+&&+isset($_POST['number2']))+{
++++$result+=+addNumbers(intval($_POST['number1']),+intval($_POST['number2']));
}
?>
<html>
<body>

++++<?php+if+(isset($result))+{+?>
++++++++<h1>+Result:+<?php+echo+$result+?></h1>
++++<?php+}+?>
++++<form+action=""+method="post">
++++1-st+number:+<input+type="text"+name="number1"+/>
++++2-nd+number:+<input+type="text"+name="number2"+/>
++++<input+type="submit"/>

</body>
</html>|code-block|syntax|javascript|2742558|请注意：|2742559|PHP+|2742560|即使这个“页面”包含PHP和代码，您的浏览器永远不知道PHP代码是什么。它所看到的只是由此产生的HTML输出。<?php+...+?>内部的所有内容都是由服务器执行的(在本例中，echo创建了这次执行的唯一输出)，而<h1>Result:...标记之外的所有内容-特别是HTML代码-都输出到HTTP响应directly.|unordered-list-item|CODE|2742561|You'll中。注意，PHP代码位于PHP语句中。这意味着第一次传递时不会输出此行，因为没有$result.|2742562|Because表单action没有值，表单提交到浏览器已在的相同页面。|2742563|2742564|2742565|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Ajax_%2528programming%2529|1|http://en.wikipedia.org/wiki/HTTP#Request_methods^0|9|4|M|13|18|C|0|0|7|3|0|0|0|0|0|O|C|1|0|10|3|0|0|0|0|0|4|0|0|1J|C|2H|4|30|E|0|1A|7|0|9|6|0|0|0^^$0|@$1|2|3|4|5|6|7|1P|8|@$9|1Q|A|1R|B|C]|$9|1S|A|1T|B|C]]|D|@$9|1U|A|1V|1|1W]]|E|$]]|$1|F|3|G|5|6|7|1X|8|@$9|1Y|A|1Z|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|20|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|21|8|@]|D|@]|E|$]]|$1|K|3|L|5|M|7|22|8|@]|D|@]|E|$]]|$1|N|3|O|5|M|7|23|8|@]|D|@]|E|$]]|$1|P|3|Q|5|M|7|24|8|@]|D|@$9|25|A|26|1|27]]|E|$]]|$1|R|3|S|5|M|7|28|8|@$9|29|A|2A|B|C]]|D|@]|E|$]]|$1|T|3|-4|5|6|7|2B|8|@]|D|@]|E|$]]|$1|U|3|V|5|6|7|2C|8|@]|D|@]|E|$]]|$1|W|3|X|5|Y|7|2D|8|@]|D|@]|E|$Z|10]]|$1|11|3|12|5|6|7|2E|8|@$9|2F|A|2G|B|C]]|D|@]|E|$]]|$1|13|3|14|5|6|7|2H|8|@]|D|@]|E|$]]|$1|15|3|16|5|17|7|2I|8|@$9|2J|A|2K|B|18]|$9|2L|A|2M|B|18]|$9|2N|A|2O|B|18]]|D|@]|E|$]]|$1|19|3|1A|5|17|7|2P|8|@$9|2Q|A|2R|B|18]]|D|@]|E|$]]|$1|1B|3|1C|5|17|7|2S|8|@$9|2T|A|2U|B|18]]|D|@]|E|$]]|$1|1D|3|-4|5|6|7|2V|8|@]|D|@]|E|$]]|$1|1E|3|-4|5|6|7|2W|8|@]|D|@]|E|$]]|$1|1F|3|-4|5|6|7|2X|8|@]|D|@]|E|$]]]|1G|$1H|$5|1I|1J|1K|E|$1L|1M]]|1N|$5|1I|1J|1K|E|$1L|1O]]]]

The &quot;function&quot; you have is server-side. Server-side code runs before and only before data is returned to your browser (typically, displayed as a page, but also could be an <a href="http://en.wikipedia.org/wiki/Ajax_%28programming%29" rel="nofollow noreferrer">ajax request</a>).
The form you have is client-side. This form is rendered by your browser and is not &quot;connected&quot; to your server, but can <a href="http://en.wikipedia.org/wiki/Form_%28web%29" rel="nofollow noreferrer">submit data to the server for processing</a>.
Therefore, to run the function, the following flow has to happen:
<ol>
<li>Server outputs the page with the form. No server-side processing needs to happen.</li>
<li>Browser loads that page and displays the form.</li>
<li>User types data into the form.</li>
<li>User presses submit button, an <a href="http://en.wikipedia.org/wiki/HTTP#Request_methods" rel="nofollow noreferrer">HTTP request</a> is made to your server with the data.</li>
<li>The page handling the request (could be the same as the first request) takes the data from the request, runs your function, and outputs the result into an HTML page.</li>
</ol>
Here is a sample PHP script which does all of this:
<pre><code>&lt;?php

function addNumbers($firstNumber, $secondNumber) {
 return $firstNumber + $secondNumber;
}

if (isset($_POST['number1']) &amp;&amp; isset($_POST['number2'])) {
 $result = addNumbers(intval($_POST['number1']), intval($_POST['number2']));
}
?&gt;
&lt;html&gt;
&lt;body&gt;

 &lt;?php if (isset($result)) { ?&gt;
 &lt;h1&gt; Result: &lt;?php echo $result ?&gt;&lt;/h1&gt;
 &lt;?php } ?&gt;
 &lt;form action=&quot;&quot; method=&quot;post&quot;&gt;
 &lt;p&gt;1-st number: &lt;input type=&quot;text&quot; name=&quot;number1&quot; /&gt;&lt;/p&gt;
 &lt;p&gt;2-nd number: &lt;input type=&quot;text&quot; name=&quot;number2&quot; /&gt;&lt;/p&gt;
 &lt;p&gt;&lt;input type=&quot;submit&quot;/&gt;&lt;/p&gt;

&lt;/body&gt;
&lt;/html&gt;
</code></pre>
Please note:
<ul>
<li>Even though this &quot;page&quot; contains both PHP and HTML code, your browser never knows what the PHP code was. All it sees is the HTML output that resulted. Everything inside <code>&lt;?php ... ?&gt;</code> is executed by the server (and in this case, <code>echo</code> creates the only output from this execution), while everything outside the PHP tags — specifically, the HTML code — is output to the HTTP Response directly.</li>
<li>You'll notice that the <code>&lt;h1&gt;Result:...</code> HTML code is inside a PHP <code>if</code> statement. This means that this line will not be output on the first pass, because there is no <code>$result</code>.</li>
<li>Because the form <code>action</code> has no value, the form submits to the same page (URL) that the browser is already on.</li>
</ul>

blocks|key|2742576|text|中缺少下划线|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2742577|$_POST['number1']|code-block|syntax|javascript|2742578|就这样。|2742579|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You are missing the underscores in 

<pre><code>$_POST['number1']
</code></pre>

That's all.

blocks|key|51496|text|尝尝这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|51497|++<?php+
++++++++++++function+addNumbers($firstNumber,+$secondNumber)
++++++++++++{
++++++++++++if+(isset($_POST['number1'])+&&+isset($_POST['number2']))
++++++++++++{
++++++++++++++++$firstNumber+=+$_POST['number1'];
++++++++++++++++$secondNumber+=+$_POST['number2'];
++++++++++++++++$result+=+$firstNumber+%2B+$secondNumber;
++++++++++++++++++++echo+$result;
++++++++++++}

++++++++++++}
++++?>

++++++++++++<form+action="urphpfilename.php"+method="post">
++++++++++++1-st+number:+<input+type="text"+name="number1"+/>
++++++++++++2-nd+number:+<input+type="text"+name="number2"+/>
++++++++++++<?php+addNumbers($firstNumber,+$secondNumber);?>
++++++++++++<?php+echo+$result;+?>
++++++++++++<input+type="submit"/>|code-block|syntax|javascript|51498|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|$]]

Try This.

<pre><code> &lt;?php 
 function addNumbers($firstNumber, $secondNumber)
 {
 if (isset($_POST['number1']) &amp;&amp; isset($_POST['number2']))
 {
 $firstNumber = $_POST['number1'];
 $secondNumber = $_POST['number2'];
 $result = $firstNumber + $secondNumber;
 echo $result;
 }

 }
 ?&gt;

 &lt;form action="urphpfilename.php" method="post"&gt;
 &lt;p&gt;1-st number: &lt;input type="text" name="number1" /&gt;&lt;/p&gt;
 &lt;p&gt;2-nd number: &lt;input type="text" name="number2" /&gt;&lt;/p&gt;
 &lt;?php addNumbers($firstNumber, $secondNumber);?&gt;
 &lt;p&gt;&lt;?php echo $result; ?&gt;&lt;/p&gt;
 &lt;p&gt;&lt;input type="submit"/&gt;&lt;/p&gt;
</code></pre>

blocks|key|50120|text|可能有点晚了，但你能在php文件的url中设置一个参数来发布示例吗：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|50121|在html中：|50122|...
<form+action="Controllers/set_data.php?post=login"+method="post"+>
...|code-block|syntax|javascript|50123|在php中：|50124|...
$post_select+=+$_GET['post'];

++switch+($post_select)+{
++++case+'setup':
++++++set_data_setup();
++++++break;
...|50125|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

maybe it's a little late
but could you set a parameter in the url of the php file to post example:
In the html :
<pre><code>...
&lt;form action=&quot;Controllers/set_data.php?post=login&quot; method=&quot;post&quot; &gt;
...

</code></pre>
In the php :
<pre><code>...
$post_select = $_GET['post'];

 switch ($post_select) {
 case 'setup':
 set_data_setup();
 break;
...
</code></pre>

blocks|key|2742626|text|你可以随时使用这个技巧。但请记住，如果引用是隐藏的，它就不起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2742627|header("Location:+"+.+$_SERVER["HTTP_REFERER"]);|code-block|syntax|javascript|2742628|只需在不再需要执行代码但仍在执行的地方添加到PHP页面即可。|2742629|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can always use this trick. But keep in mind that if the referrer is hidden it doesn't work.
<pre><code>header(&quot;Location: &quot; . $_SERVER[&quot;HTTP_REFERER&quot;]);
</code></pre>
Just add to your PHP page at the point where there is no more code to be executed, but is still executed.

I'm absolute beginner in web technologies. I know that my question is very simple, but I don't know how to do it.
For example I have a function: 

<pre><code>function addNumbers($firstNumber, $secondNumber)
{
 echo $firstNumber + $secondNumber;
}
</code></pre>

And I have a form:

<pre><code>&lt;form action="" method="post"&gt;
&lt;p&gt;1-st number: &lt;input type="text" name="number1" /&gt;&lt;/p&gt;
&lt;p&gt;2-nd number: &lt;input type="text" name="number2" /&gt;&lt;/p&gt;
&lt;p&gt;&lt;input type="submit"/&gt;&lt;/p&gt;
</code></pre>



How can I input variables on my text fields and call my function by button pressing with arguments that I've wrote into text fields?
For example I write 5 - first textfield, 10 - second textfield, then I click button and I get the result 15 on the same page.
EDITED
I've tried to do it so:

<pre><code>$num1 = $POST['number1'];
$num2 = $POST['number2'];
addNumbers($num1, $num2);
</code></pre>

But it doesn't work, the answer is 0 always.

How to run a PHP function from an HTML form?

服务器

我绝对是web技术的初学者。我知道我的问题很简单，但我不知道该怎么做。例如，我有一个函数：function addNumbers($firstNumber, $secondNumber){ echo $firstNumber + $secondNumber;}我有一张表格：<form action="" meth...

问如何从HTML表单运行PHP函数？
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