Function is not getting called on clicking the button-CodePudding

This code is in first.php


function fas(){
    echo "fuction";
    echo "Anything";
}

if(isset($_POST['btn'])){
    fas();
}
?>

Code in second.php

<?php 
include 'first.php'
?>

<!DOCTYPE html>
<head>
    <title>Document</title>
</head>
<body>
    <button type= "submit" name = "btn"> click this</button>
</body>
</html>

On clicking the button, function fas is not getting called. What's the issue?

CodePudding user response：

You could put the button in a form tag, then the button like this:

<form action="/" method="post">
  <button type="submit">Submit</button>
</form>

Or you could do it like this:

<button onclick="function_name()">Submit</button>

The second one is going to call the function directly, and not go to a separate link like a form would.