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Asked: 2026-06-17T07:55:24+00:00

I want to submit a form with php variables to input into javascript, the

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I want to submit a form with php variables to input into javascript, the problem is that the variables are only set after posting, which is too late for them to be echoed into the javascript. Of course, if I then submit again, the variables have been implemented into the javascript and it works as it should. However, I would prefer just to submit once.
Is there any way to validate the form before submission ? Here is an example of my dilemma:

<?php
      if(isset($_POST['submit'])){$name=$_POST['name'];}
?>

<html>
 <div id="message"></div>
    <form action="home.html" method="POST">
       <input type="text" name="name">
       <input type="submit" name="submit" value="conditions-met" 
              onclick=<?php if($name=="bob"){echo"start();";}?>>
    </form>
</html>

 <script type="text/javascript">

  function start(){
       document.getElementById('message').innerHTML = 'hello bob';
  return true;
}
 </script>
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1 Answer

  1. Editorial Team
    <html>
<div id="message"></div>
<form action="home.html" method="POST" onsubmit="return validate()">
<input type="text" name="name" id="name">
<input type="submit" name="submit" value="conditions-met" >
</form>
</html>

<script type="text/javascript">

function validate(){

name=document.getElementById('name').value;
if(name == "")
{
document.getElementById('message').innerHTML = 'Please Fill Name';
return false;
}
return true;
}
</script>
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