Calling a PHP function in javascript function

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A simple problem where a javascript function is being called by button through onclick..
And that js function calls a php function..

My actual motto is that a function should be called when a html button is clicked..so that the function should be able to block a div.

Quick reply will help me alotttt

What I have tried:

<?php
function f1()
{
 echo "f1 called";
}
function f2()
{
 echo "f2 called";
}
?>

<html>
<head><title>Trail</title></head>
<body background="yellow" onload="start()">
<div style="display:none" id="1">
<h1>SYSTEM</h1>
</div>
<div style="display:none" id="2">
<p>Welcome</p>
</div>
<div style="display:none" id="3">
<p>Ramaa</p>
</div>
<input type="button" value="welcome" onclick="one()">
<input type="button" value="welcome" onclick="two()">
<script>
function start()
{
 document.getElementById("1").style.display="block";
}
function one()
{
 document.getElementById("2").style.display="block";
 document.getElementById("3").style.display="none";
 <?php
  f1();
 ?>
}
function two()
{
 document.getElementById("2").style.display="none"
  document.getElementById("3").style.display="block";
 <?php
  f2();
 ?>
}
</script>
</html>

//problem

Before inserting php code it worked really great i.e, onload is working and onclicking buttons corresponding functions are called.But when I put php code in it..onload is not working and onclick is also not working.It will be very helpful if someone let me know the mistake in it.

Posted 4-Apr-17 17:56pm

Member 13106606

Updated 4-Apr-17 20:25pm

v3

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Peter_in_2780 5-Apr-17 0:29am

Think about it. PHP runs on the server, while the page is being built for transmission to the client.

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Mohibur Rashid · Answer 1 · 2017-04-04T20:25:00

a very simple test for you, hope it will get you going

index.php

<HTML>
  <HEAD>
    <SCRIPT SRC="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></SCRIPT>
    <SCRIPT>
      function call_function (value) {
        var a = document.forms[0].a.value;
        var b = document.forms[0].b.value;
        $.get({
            url: 'func.php?a=' + a + '&b=' + b+"&action="+value, 
            success: function(result){
                $('#here').html(result);
              }
        }
      );
      return false;
      }
    </SCRIPT>
  </HEAD>
  <BODY>
      <FORM onsubmit='return false'>
      <INPUT NAME=a> <br>
      <INPUT NAME=b> <br>
      <INPUT TYPE=SUBMIT VALUE=add NAME=action  onclick="call_function(this.value)">
       
       
       
       
       
      <INPUT TYPE=SUBMIT VALUE=multiply NAME=action onclick="call_function(this.value)">
      <FORM>
    <div id='here'>
    </div>
  </BODY>
</HTML>

func.php

<?php
  function add($a, $b) {
    return $a+$b;
  }
  function multiply($a, $b) {
    return $a*$b;
  }
  if($_GET['action'] == "add") {
    echo add($_GET['a'], $_GET['b']);
    
  } else if($_GET['action'] == "multiply") {
    echo multiply($_GET['a'], $_GET['b']);
  }