blocks|key|1502313|text|你不能用Javascript运行PHP代码。当用户收到页面时，服务器将评估并运行所有PHP代码，并将其取出。因此，举个例子，这是可行的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1502314|alert(+<?php+echo+"\"Hello\"";+?>+);|code-block|syntax|javascript|1502315|因为服务器会将其求值为：|1502316|alert("Hello");|1502317|但是，您不能使用它在PHP中执行任何操作。|1502318|这一点：|1502319|function+Inc()
{
<?php
$num+=+2;
echo+$num;
?>
}|1502320|将会被简单地评估为：|1502321|function+Inc()
{
++++2
}|1502322|如果您不想调用PHP脚本，则必须调用一个不同的页面，该页面从一组参数中返回一个值。|1502323|例如，这将会起作用：|1502324|script.php|1502325|$num+=+$_POST["num"];
echo+$num+*+2;|1502326|Javascript(jQuery)+(在另一个页面上)：|1502327|$.post('script.php',+{+num:+5+},+function(result)+{+
+++alert(result);+
});|1502328|这应该会警告10。|1502329|祝好运!|1502330|http://jsfiddle.net/puVPc/：只需在页面上增加一个数字，就可以像这样在jQuery中轻松完成：|offset|length|1502331|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/puVPc/^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|Q|0|0^^$0|@$1|2|3|4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|1P|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1R|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|1S|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1T|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1U|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|1V|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1W|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1X|8|@]|9|@]|A|$]]|$1|10|3|11|5|D|7|1Y|8|@]|9|@]|A|$E|F]]|$1|12|3|13|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|14|3|15|5|D|7|20|8|@]|9|@]|A|$E|F]]|$1|16|3|17|5|6|7|21|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|22|8|@]|9|@]|A|$]]|$1|1A|3|1B|5|6|7|23|8|@]|9|@$1C|24|1D|25|1|26]]|A|$]]|$1|1E|3|-4|5|6|7|27|8|@]|9|@]|A|$]]]|1F|$1G|$5|1H|1I|1J|A|$1K|1L]]]]

<p>You can't run PHP code with Javascript. When the user recieves the page, the server will have evaluated and run all PHP code, and taken it out. So for example, this will work:</p>

<pre><code>alert( &lt;?php echo "\"Hello\""; ?&gt; );
</code></pre>

<p>Because server will have evaluated it to this:</p>

<pre><code>alert("Hello");
</code></pre>

<p>However, you can't perform any operations in PHP with it.</p>

<p>This:</p>

<pre><code>function Inc()
{
&lt;?php
$num = 2;
echo $num;
?&gt;
}
</code></pre>

<p>Will simply have been evaluated to this:</p>

<pre><code>function Inc()
{
    2
}
</code></pre>

<p>If you wan't to call a PHP script, you'll have to call a different page which returns a value from a set of parameters.</p>

<p>This, for example, will work:</p>

<p>script.php</p>

<pre><code>$num = $_POST["num"];
echo $num * 2;
</code></pre>

<p>Javascript(jQuery) (on another page):</p>

<pre><code>$.post('script.php', { num: 5 }, function(result) { 
   alert(result); 
});
</code></pre>

<p>This should alert 10.</p>

<p>Good luck!</p>

<p>Edit: Just incrementing a number on the page can be done easily in jQuery like this: <a href="http://jsfiddle.net/puVPc/">http://jsfiddle.net/puVPc/</a></p>


blocks|key|3878880|text|在上面给定的代码中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3878881|将php值赋给javascript变量。|3878882|<html>
<?php
+$num+=+1;
+echo+$num;
?>
++<input+type+=+"button"+name+=+"lol"+value+=+"Click+to+increment"+onclick+=+"Inc()">
++<br>
++<script>
+++var+numeric+=+<?php+echo+$num;+?>";+//assigns+value+of+the+$num+to+javascript+var+++++++++++++numeric+
++function+Inc()
+++{
+++++numeric+=+eVal(numeric)+%2B+1;
+++++alert("Increamented+value:+"%2Bnumeric);
+++}
++</script>
</html>|code-block|syntax|javascript|3878883|PHP和javascript组合的一件事是你不能将javascript值赋给PHP值。你可以将PHP值赋给javascript变量。|3878884|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>In the above given code </p>

<p>assign the php value to javascript variable.</p>

<pre><code>&lt;html&gt;
&lt;?php
 $num = 1;
 echo $num;
?&gt;
  &lt;input type = "button" name = "lol" value = "Click to increment" onclick = "Inc()"&gt;
  &lt;br&gt;
  &lt;script&gt;
   var numeric = &lt;?php echo $num; ?&gt;"; //assigns value of the $num to javascript var             numeric 
  function Inc()
   {
     numeric = eVal(numeric) + 1;
     alert("Increamented value: "+numeric);
   }
  &lt;/script&gt;
&lt;/html&gt;
</code></pre>

<p>One thing in combination of PHP and Javsacript is you can not assign javascript value to PHP value. You can assign PHP value to javascript variable.</p>


blocks|key|3878902|text|试试这个可能行得通..|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3878903|<html>
+++<?php+$num+=+1;+?>
+++<div+id="Count"><?php+echo+$num;+?></div>
+++<input+type+=+"button"+name+=+"lol"+value+=+"Click+to+increment"+onclick+=+"Inc()">
+++<br>
+++<script>
+++function+Inc()+{
+++++++i+=+parseInt(document.getElementById('Count').innerHTML);
+++++++document.getElementById('Count').innerHTML+=+i%2B1;
+++}
+++</script>
</html>|code-block|syntax|javascript|3878904|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>Try this may work..</p>

<pre><code>&lt;html&gt;
   &lt;?php $num = 1; ?&gt;
   &lt;div id="Count"&gt;&lt;?php echo $num; ?&gt;&lt;/div&gt;
   &lt;input type = "button" name = "lol" value = "Click to increment" onclick = "Inc()"&gt;
   &lt;br&gt;
   &lt;script&gt;
   function Inc() {
       i = parseInt(document.getElementById('Count').innerHTML);
       document.getElementById('Count').innerHTML = i+1;
   }
   &lt;/script&gt;
&lt;/html&gt;
</code></pre>


blocks|key|3878925|text|我认为您混淆了服务器代码和客户端代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3878926|JavaScript在接收到来自服务器的数据(如网页)后，在客户端运行。|3878927|PHP在发送数据之前在服务器上运行。|3878928|所以有两种方式可以通过php与JavaScript进行交互。|3878929|和上面一样，你可以用php生成javascript，就像用php生成HTML一样。|3878930|或者，您可以使用来自javascript的AJAX请求与服务器进行交互。服务器可以响应数据，javascript可以接收数据并对其执行某些操作。|3878931|我建议回到基础并研究HTTP在服务器-客户端关系中是如何工作的。然后研究了服务器端语言和客户端语言的概念。|3878932|然后学习ajax教程，您将开始理解这个概念。|3878933|祝你好运，谷歌是你的朋友。|3878934|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|10|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|11|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|S|$]]

<p>I think you're confusing server code with client code.</p>

<p>JavaScript runs on the client after it has received data from the server (like a webpage).</p>

<p>PHP runs on the server before it sends the data.</p>

<p>So there are two ways with interacting with JavaScript with php.</p>

<p>Like above, you can generate javascript with php in the same fashion you generate HTML with php.</p>

<p>Or you can use an AJAX request from javascript to interact with the server.  The server can respond with data and the javascript can receive that and do something with it.</p>

<p>I'd recommend going back to the basics and studying how HTTP works in the server-client relationship.  Then study the concept of server side languages and client side languages.</p>

<p>Then take a tutorial with ajax, and you will start getting the concept.</p>

<p>Good luck, google is your friend.</p>


blocks|key|1502366|text|尽管有一些评论，但在某些情况下，确实有必要在Javascript中访问PHP函数(例如AJAX案例)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1502367|在这些情况下，您可以使用mwsX库在Javascript中使用您的PHP函数。|1502368|mwsX库：https://github.com/loureirorg/mwsx|offset|length|1502369|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/loureirorg/mwsx^0|0|0|6|Y|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

<p>despite some comments, at some cases it's really necessary to access PHP functions at Javascript (e.g. the AJAX cases). </p>

<p>At these cases you can use the mwsX library to use your PHP functions at Javascript.</p>

<p>mwsX library:
<a href="https://github.com/loureirorg/mwsx" rel="nofollow">https://github.com/loureirorg/mwsx</a></p>


blocks|key|1768325|text|有一种方法可以在客户端javascript中运行php+(这里不讨论服务器端的js+)。不知道这是不是一个非常好的主意，但你可以。正如一些人指出的那样，你必须记住，php是在服务器上计算的，然后作为静态内容返回给浏览器，然后浏览器将运行带有来自服务器的添加数据的javascript。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1768326|您必须告诉服务器将js文件评估为php文件，如果您运行的是apache服务器，则可以使用如下的htaccess-file来执行此操作：|1768327|<FilesMatch+"\.js$">
SetHandler+application/x-httpd-php
Header+set+Content-type+"application/javascript"
</FilesMatch>|code-block|syntax|javascript|1768328|更多信息请点击此处：|1768329|Parse+js/css+as+a+PHP+file+using+htaccess|offset|length|1768330|http://css-tricks.com/snippets/htaccess/use-php-inside-javascript/|1768331|Edit:在http页面请求时，这个技巧可以让php编译器解析带有js扩展名的文件。将执行js文件中的所有php部分，并将添加了服务器数据的js文件交给浏览器。|1768332|但是，OP使用的是html格式的文件(可能带有php扩展名)，没有js文件，因此在这种特定情况下，没有必要使用我的建议。|1768333|建议的js解决方案是可行的。如果变量需要存储在服务器上，可以使用ajax将其发送到服务器。|1768334|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/10722375/parse-js-css-as-a-php-file-using-htaccess|1^0|0|0|0|0|0|15|0|0|0|1U|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|16|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|17|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|18|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|19|8|@]|9|@$M|1A|N|1B|1|1C]]|A|$]]|$1|O|3|P|5|6|7|1D|8|@]|9|@$M|1E|N|1F|1|1G]]|A|$]]|$1|Q|3|R|5|6|7|1H|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1I|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1J|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|Z|10|11|A|$12|P]]]]

<p>There is a way to run php in client-side javascript (not talking about server-side js here). Don't know if this is a very good idea, but you can. As some people pointed out you have to keep in mind the php is evaluated on the server and then returned as static stuff to the browser who will then run the javascript with the added data from the server.</p>

<p>You have to tell the server to evaluate the js files as php files, if you are running an apache server you can do this with a htaccess-file like this:</p>

<pre><code>&lt;FilesMatch "\.js$"&gt;
SetHandler application/x-httpd-php
Header set Content-type "application/javascript"
&lt;/FilesMatch&gt;
</code></pre>

<p>More info here:</p>

<p><a href="https://stackoverflow.com/questions/10722375/parse-js-css-as-a-php-file-using-htaccess">Parse js/css as a PHP file using htaccess</a></p>

<p><a href="http://css-tricks.com/snippets/htaccess/use-php-inside-javascript/" rel="nofollow noreferrer">http://css-tricks.com/snippets/htaccess/use-php-inside-javascript/</a></p>

<p>Edit: On http page request this trick makes files with js extension be parsed by the php compiler. All php parts in the js file will get executed and the js file with added server data will be handed to the browser.</p>

<p>However, the OP uses an html formated file (probably with php extension), no js file, so in this specific case there's no need for my suggestion.</p>

<p>The suggested js solutions are the way to go. If the variable needs to get stored on the server, use ajax to send it there.</p>


blocks|key|1768342|text|您可以在php中使用脚本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1768343|<?php

++++++++$num+=+1;
++++++++echo+$num;

++++echo+'<input+type="button"
+++++++++++name="lol"+
+++++++++++value="Click+to+increment"
+++++++++++onclick="Inc()"+/>
++++<br>
++++<script>
++++++++function+Inc()
++++++++{';
++++++++++++$num+=+2;
++++++++++++echo+$num;

++++++++echo+'}
++++</script>';
?>|code-block|syntax|javascript|1768344|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 use script in php..</p>

<pre><code>&lt;?php

        $num = 1;
        echo $num;

    echo '&lt;input type="button"
           name="lol" 
           value="Click to increment"
           onclick="Inc()" /&gt;
    &lt;br&gt;
    &lt;script&gt;
        function Inc()
        {';
            $num = 2;
            echo $num;

        echo '}
    &lt;/script&gt;';
?&gt;
</code></pre>


blocks|key|1502378|text|简单地说，您的问题听起来是错误的，因为JavaScript变量需要回显。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1502379|​|1502380|<?php
++++++++$num+=+1;
++++++++echo+$num;
++++++++echo+"<input+type='button'+value='Click'+onclick='readmore()'+/>";
+++		echo+"<script>+function+readmore()+{+document.write('";
++++++++$num+=+2;
++++++++echo+$num;
++++++++echo+"');+}+</script>";
?>|code-block|syntax|javascript|1502381|1502382|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$G|H]]|$1|I|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|K|$]]

<p>Simply, your question sounded wrong because the JavaScript variables need to be echoed.</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;?php
        $num = 1;
        echo $num;
        echo "&lt;input type='button' value='Click' onclick='readmore()' /&gt;";
   		echo "&lt;script&gt; function readmore() { document.write('";
        $num = 2;
        echo $num;
        echo "'); } &lt;/script&gt;";
?&gt;</code></pre>
</div>
</div>
</p>


blocks|key|5296076|text|只需返回它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5296077|<html>
++++<?php
++++++++$num+=+1;
++++++++echo+$num;
++++?>
++++<input+type="button"
+++++++name="lol"+
+++++++value="Click+to+increment"
+++++++onclick="Inc()"+/>
++++<br>
++++<script>
++++++++function+Inc()
++++++++{
++++++++++++Return+<?php
++++++++++++$num+=+2;
++++++++++++echo+$num;
++++++++++++?>;
++++++++}
++++</script>
</html>|code-block|syntax|javascript|5296078|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>Simply return it:</p>

<pre><code>&lt;html&gt;
    &lt;?php
        $num = 1;
        echo $num;
    ?&gt;
    &lt;input type="button"
       name="lol" 
       value="Click to increment"
       onclick="Inc()" /&gt;
    &lt;br&gt;
    &lt;script&gt;
        function Inc()
        {
            Return &lt;?php
            $num = 2;
            echo $num;
            ?&gt;;
        }
    &lt;/script&gt;
&lt;/html&gt;
</code></pre>


<pre><code>&lt;html&gt;
    &lt;?php
        $num = 1;
        echo $num;
    ?&gt;
    &lt;input type="button"
           name="lol" 
           value="Click to increment"
           onclick="Inc()" /&gt;
    &lt;br&gt;
    &lt;script&gt;
        function Inc()
        {
        &lt;?php
            $num = 2;
            echo $num;
        ?&gt;
        }
    &lt;/script&gt;
&lt;/html&gt;
</code></pre>

<p>This is what i have so far, not working though, i think i need to use ajax or something but i have no idea what to do.</p>

<p>Thanks</p>


How can you use php in a javascript function

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。

页面排版不美观，阅读体验差。

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<html>    <?php        $num = 1;        echo $num;    ?>    <input type="button"           name="lol"            value="Click to increment"           onclick="I...

问如何在javascript函数中使用php？
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问如何在javascript函数中使用php？EN