blocks|key|1896753|text|你不能调用PHP函数，比如点击HTML中的按钮。因为HTML在客户端，而PHP运行在服务器端。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1896754|您要么需要使用一些Ajax，要么像下面的代码片段中那样做。|1896755|<?php
++++if+($_GET)+{
++++++++if+(isset($_GET['insert']))+{
++++++++++++insert();
++++++++}+elseif+(isset($_GET['select']))+{
++++++++++++select();
++++++++}
++++}

++++function+select()
++++{
+++++++echo+"The+select+function+is+called.";
++++}

++++function+insert()
++++{
+++++++echo+"The+insert+function+is+called.";
++++}
?>|code-block|syntax|javascript|1896756|您必须发布表单数据，然后检查是否单击了适当的按钮。|1896757|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>You cannot call PHP functions like clicking on a button from HTML. Because HTML is on the client side while PHP runs server side.</p>

<p>Either you need to use some Ajax or do it like as in the code snippet below.</p>

<pre><code>&lt;?php
    if ($_GET) {
        if (isset($_GET['insert'])) {
            insert();
        } elseif (isset($_GET['select'])) {
            select();
        }
    }

    function select()
    {
       echo "The select function is called.";
    }

    function insert()
    {
       echo "The insert function is called.";
    }
?&gt;
</code></pre>

<p>You have to post your form data and then check for appropriate button that is clicked.</p>


blocks|key|1896846|text|HTML中的onclick属性调用JavaScript函数，而不是PHP函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1896847|entityMap^0|6|7|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<p>The <code>onclick</code> attribute in HTML calls JavaScript functions, not PHP functions. </p>


blocks|key|1683264|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1683265|if($_POST['select']+and+$_SERVER['REQUEST_METHOD']+==+"POST"){
++++select();
}
if($_POST['insert']+and+$_SERVER['REQUEST_METHOD']+==+"POST"){
++++insert();
}|code-block|syntax|javascript|1683266|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:</p>

<pre><code>if($_POST['select'] and $_SERVER['REQUEST_METHOD'] == "POST"){
    select();
}
if($_POST['insert'] and $_SERVER['REQUEST_METHOD'] == "POST"){
    insert();
}
</code></pre>


blocks|key|1683351|text|下面是一个你可以使用的例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1683352|<html>
++++<body>
++++++++<form+action="btnclick.php"+method="get">
++++++++++++<input+type="submit"+name="on"+value="on">
++++++++++++<input+type="submit"+name="off"+value="off">
++++++++</form>
++++</body>
</html>
<?php
++++if(isset($_GET['on']))+{
++++++++onFunc();
++++}
++++if(isset($_GET['off']))+{
++++++++offFunc();
++++}

++++function+onFunc(){
++++++++echo+"Button+on+Clicked";
++++}
++++function+offFunc(){
++++++++echo+"Button+off+clicked";
++++}
?>|code-block|syntax|javascript|1683353|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>Here is an example which you could use:</p>

<pre><code>&lt;html&gt;
    &lt;body&gt;
        &lt;form action="btnclick.php" method="get"&gt;
            &lt;input type="submit" name="on" value="on"&gt;
            &lt;input type="submit" name="off" value="off"&gt;
        &lt;/form&gt;
    &lt;/body&gt;
&lt;/html&gt;
&lt;?php
    if(isset($_GET['on'])) {
        onFunc();
    }
    if(isset($_GET['off'])) {
        offFunc();
    }

    function onFunc(){
        echo "Button on Clicked";
    }
    function offFunc(){
        echo "Button off clicked";
    }
?&gt;
</code></pre>


blocks|key|1897041|text|在表单操作调用自身的地方使用递归调用。然后以相同的形式添加PHP代码来捕获它。在foo.php中，表单将在post上调用foo.php|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1897042|<html>
++++<body>
++++++++<form+action="foo.php"+method="post">|code-block|syntax|javascript|1897043|表单提交后，它将自己命名为(foo.php)，您可以通过PHP预定义变量$_SERVER捕获它，如下面的代码所示|1897044|<?php
++++if+($_SERVER['REQUEST_METHOD']+==+'POST')+{
++++++++echo+"caught+post";
++++}
?>
++++++++</form>
++++</body>
</html>|1897045|entityMap^0|14|7|1H|4|1O|7|0|0|E|7|10|8|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|P|$]]

<p>Use a recursive call where the form action calls itself.  Then add PHP code in the same form to catch it.  In <code>foo.php</code> your form will call <code>foo.php</code> on <code>post</code></p>

<pre><code>&lt;html&gt;
    &lt;body&gt;
        &lt;form action="foo.php" method="post"&gt;
</code></pre>

<p>Once the form has been submitted it will call itself (<code>foo.php</code>) and you can catch it via the PHP predefined variable <code>$_SERVER</code> as shown in the code below </p>

<pre><code>&lt;?php
    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        echo "caught post";
    }
?&gt;
        &lt;/form&gt;
    &lt;/body&gt;
&lt;/html&gt;
</code></pre>


blocks|key|1897214|text|要在输入中显示$message：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1897215|<?php
++++if(isset($_POST['insert'])){
++++++++$message=+"The+insert+function+is+called.";
++++}
++++if(isset($_POST['select'])){
++++++++$message="The+select+function+is+called.";
++++}
?>


<form++method="post">
++++<input+type="text"+name="txt"+value="<?php+if(isset($message)){+echo+$message;}?>"+>
++++<input+type="submit"+name="insert"+value="insert">
++++<input+type="submit"+name="select"+value="select"+>
</form>|code-block|syntax|javascript|1897216|要将functioncalling.php用作外部文件，必须以某种方式将其包含在文档中。|1897217|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|$]]

<p>To show $message in your input:</p>

<pre><code>&lt;?php
    if(isset($_POST['insert'])){
        $message= "The insert function is called.";
    }
    if(isset($_POST['select'])){
        $message="The select function is called.";
    }
?&gt;


&lt;form  method="post"&gt;
    &lt;input type="text" name="txt" value="&lt;?php if(isset($message)){ echo $message;}?&gt;" &gt;
    &lt;input type="submit" name="insert" value="insert"&gt;
    &lt;input type="submit" name="select" value="select" &gt;
&lt;/form&gt;
</code></pre>

<p>To use functioncalling.php as an external file you have to include it somehow in your HTML document.</p>


blocks|key|1683688|text|您可以在JavaScript或jQuery+Ajax中像这样编写并调用该文件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1683689|​|1683690|$('#btn').click(function(){
++$.ajax({
++++url:'test.php?call=true',
++++type:'GET',
++++success:function(data){
++++body.append(data);
++++}
++});
})|code-block|syntax|javascript|1683691|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.1/jquery.min.js"></script>
<form++method='get'+>

++<input+type="button"+id="btn"+value="click">
</form>

<?php
++++if(isset($_GET['call'])){

++++++++function+anyfunction(){
++++++++++++echo+"added";

++++++++++++//+Your+funtion+code
++++++++}
++++}
?>|1683692|1683693|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|K|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

<p>You can write like this in JavaScript or jQuery Ajax and call the file</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-js lang-js prettyprint-override"><code>$('#btn').click(function(){
  $.ajax({
    url:'test.php?call=true',
    type:'GET',
    success:function(data){
    body.append(data);
    }
  });
})</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.1/jquery.min.js"&gt;&lt;/script&gt;
&lt;form  method='get' &gt;

  &lt;input type="button" id="btn" value="click"&gt;
&lt;/form&gt;

&lt;?php
    if(isset($_GET['call'])){

        function anyfunction(){
            echo "added";

            // Your funtion code
        }
    }
?&gt;</code></pre>
</div>
</div>
</p>


blocks|key|1683793|text|我被困在这里，我用一个隐藏的字段解决了它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1683794|<form+method="post"+action="test.php">
++++<input+type="hidden"+name="ID"+value"">
</form>|code-block|syntax|javascript|1683795|在value中，您可以添加任何您想添加的内容。|offset|length|style|CODE|1683796|在test.php中，您可以通过$_Post[ID]检索值。|1683797|entityMap^0|0|0|1|5|0|G|A|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@$I|W|J|X|K|L]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

<p>I was stuck in this and I solved it with a hidden field:</p>

<pre><code>&lt;form method="post" action="test.php"&gt;
    &lt;input type="hidden" name="ID" value""&gt;
&lt;/form&gt;
</code></pre>

<p>In <code>value</code> you can add whatever you want to add.</p>

<p>In test.php you can retrieve the value through <code>$_Post[ID]</code>.</p>


blocks|key|1683847|text|你可以简单地做到这一点。在php中，您可以通过使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1683848|if(isset($_Post['button_tag_name']){
echo+"Button+Clicked";
}|code-block|syntax|javascript|1683849|因此，您应该修改代码，如下所示：|1683850|<?php

if(isset($_Post['select']){
+echo+"select+button+clicked+and+select+method+should+be+executed";
}
if(isset($_Post['insert']){
+echo+"insert+button+clicked+and+insert+method+should+be+executed";
}
+++++++++++
++++++++?>

<!DOCTYPE+html+PUBLIC+"-//W3C//DTD+XHTML+1.0+Transitional//EN"+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
++++<body>
++++++++<form+action="functioncalling.php">
++++++++++++<input+type="text"+name="txt"+/>
++++++++++++<input+type="submit"+name="insert"+value="insert"+onclick="insert()"+/>
++++++++++++<input+type="submit"+name="select"+value="select"+onclick="select()"+/>
++++++++</form>

<script>
//This+will+be+processed+on+the+client+side
function+insert(){
++window.alert("You+click+insert+button");
}

function+select(){
++window.alert("You+click+insert+button");
}
</script>
</body>
</html>|1683851|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>You can simply do this. In php, you can determine button click by use of</p>
<pre><code>if(isset($_Post['button_tag_name']){
echo &quot;Button Clicked&quot;;
}
</code></pre>
<p>Therefore you should modify you code as follows:</p>
<pre><code>
&lt;?php

if(isset($_Post['select']){
 echo &quot;select button clicked and select method should be executed&quot;;
}
if(isset($_Post['insert']){
 echo &quot;insert button clicked and insert method should be executed&quot;;
}
           
        ?&gt;

&lt;!DOCTYPE html PUBLIC &quot;-//W3C//DTD XHTML 1.0 Transitional//EN&quot; &quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd&quot;&gt;
&lt;html&gt;
    &lt;body&gt;
        &lt;form action=&quot;functioncalling.php&quot;&gt;
            &lt;input type=&quot;text&quot; name=&quot;txt&quot; /&gt;
            &lt;input type=&quot;submit&quot; name=&quot;insert&quot; value=&quot;insert&quot; onclick=&quot;insert()&quot; /&gt;
            &lt;input type=&quot;submit&quot; name=&quot;select&quot; value=&quot;select&quot; onclick=&quot;select()&quot; /&gt;
        &lt;/form&gt;

&lt;script&gt;
//This will be processed on the client side
function insert(){
  window.alert(&quot;You click insert button&quot;);
}

function select(){
  window.alert(&quot;You click insert button&quot;);
}
&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;


        
</code></pre>


blocks|key|1684103|text|使用HTML按钮调用PHP函数:创建一个包含HTML按钮的HTML表单文档。单击该按钮时，将调用POST方法。POST方法描述如何将数据发送到服务器。单击该按钮后，将调用array_key_exists()函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1684104|<?php
++++if(array_key_exists('button1',+$_POST))+{+
++++++++button1();+
++++}+
++++else+if(array_key_exists('button2',+$_POST))+{+
++++++++button2();+
++++}+
++++function+button1()+{+
++++++++echo+"This+is+Button1+that+is+selected";+
++++}+
++++function+button2()+{+
++++++++echo+"This+is+Button2+that+is+selected";+
++++}+
?>+

<form+method="post">+
++++<input+type="submit"+name="button1"+class="button"+value="Button1"+/>+
++++<input+type="submit"+name="button2"+class="button"+value="Button2"+/>+
</form>+|code-block|syntax|javascript|1684105|来源：geeksforgeeks.org|1684106|entityMap|0|LINK|mutability|MUTABLE|url|https://www.geeksforgeeks.org/how-to-call-php-function-on-the-click-of-a-button/^0|2D|I|0|0|3|H|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

<p>Calling a PHP function using the HTML button: Create an HTML form document which contains the HTML button. When the button is clicked the method POST is called. The POST method describes how to send data to the server. After clicking the button, the <code>array_key_exists()</code> function called.</p>
<pre><code>&lt;?php
    if(array_key_exists('button1', $_POST)) { 
        button1(); 
    } 
    else if(array_key_exists('button2', $_POST)) { 
        button2(); 
    } 
    function button1() { 
        echo &quot;This is Button1 that is selected&quot;; 
    } 
    function button2() { 
        echo &quot;This is Button2 that is selected&quot;; 
    } 
?&gt; 

&lt;form method=&quot;post&quot;&gt; 
    &lt;input type=&quot;submit&quot; name=&quot;button1&quot; class=&quot;button&quot; value=&quot;Button1&quot; /&gt; 
    &lt;input type=&quot;submit&quot; name=&quot;button2&quot; class=&quot;button&quot; value=&quot;Button2&quot; /&gt; 
&lt;/form&gt; 
</code></pre>
<p>source: <a href="https://www.geeksforgeeks.org/how-to-call-php-function-on-the-click-of-a-button/" rel="nofollow noreferrer">geeksforgeeks.org</a></p>


<p>I have created a page called <code>functioncalling.php</code> that contains two buttons, <em>Submit</em> and <em>Insert</em>.</p>
<p>I want to test which function is executed when a button gets clicked. I want the output to appear on the same page. So, I created two functions, one for each button.</p>
<pre class="lang-php prettyprint-override"><code>&lt;form action=&quot;functioncalling.php&quot;&gt;
    &lt;input type=&quot;text&quot; name=&quot;txt&quot; /&gt;
    &lt;input type=&quot;submit&quot; name=&quot;insert&quot; value=&quot;insert&quot; onclick=&quot;insert()&quot; /&gt;
    &lt;input type=&quot;submit&quot; name=&quot;select&quot; value=&quot;select&quot; onclick=&quot;select()&quot; /&gt;
&lt;/form&gt;

&lt;?php
    function select(){
        echo &quot;The select function is called.&quot;;
    }
    function insert(){
        echo &quot;The insert function is called.&quot;;
    }
?&gt;
</code></pre>
<p>The problem here is that I don't get any output after any of the buttons are clicked.</p>
<p>Where exactly am I going wrong?</p>


How to call a PHP function on the click of a button

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jQuery

我创建了一个名为functioncalling.php的页面，其中包含两个按钮: Submit和Insert。我想测试当一个按钮被点击时，哪个函数会被执行。我希望输出出现在同一页上。因此，我创建了两个函数，每个按钮一个。<form action="functioncalling.php">    <input type...

问如何在单击按钮时调用PHP函数
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问如何在单击按钮时调用PHP函数
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