CODEWITHSUNDEEP
phpjavascriptvariables
user1467788
user1467788

Reputation: 5

pass variable from input box to php

Hi all i know this question has been posted but being a total noob i couldnt get what answers meant. Please help. I want to pass inputbox value dynamically to a php variable . i am using javascript here please suggest if there's another way without using form submission , _GET or _POST. i want it done dynamically without any submission. 

function showHint(str)
    {
    document.getElementById('TK').innerHTML = str;
    var str = str

    }

</script>


<html>
<head>Inputbox</head>
<title>TEST PAGE </TITLE>
<body>
<input type='text' id='TK' name='TK' onkeyup='showHint(this.value)'/>
<?php
$str = var  str ;  
echo "<a href = 'newpage.php?S=$str'/>" ; ?>
</body>
</html>

Upvotes: 0

Views: 2547

Answers (3)

Stephen
Stephen

Reputation: 5770

I would imagine the other answers you found probably would have said the following:

PHP executes before the user has a chance to see the page.

JS let you control what happens after.

Therefore, your problem is that you are trying to use PHP to do something it simply cannot.

Use those points to help guide your decisions when developing your applications. In this case, if you're trying to build a link based on what a user types in a box, your solution to the problem isn't PHP at all (the page is already loaded, you're too late!) -- your solution is JS.

Think about it like this:

/* 
  assumes you already have an <a> on the page.  if not, you'll 
  have to create a new <a> element dynamically.  (google "mdn createElement"
  for help)
*/
function showHint (str) {
    document.getElementById('TK').innerHTML = str;
    var link = document.getElementById('your-a-link');
    link.setAttribute('href', 'newpage.php?S=' + str);
}

Upvotes: 0

Zak
Zak

Reputation: 7523

<script type="text/javascript" >
function process(){
var field1 = 'whatever';
var field2 = 'more whatever';

$.post("go.php",{field:field1,bext_field:field2},function(result){
         alert(result); 


});

};
</script>

This will alert out whatever you ECHO from GO.PHP.

You will also need a handler like:

onClick="process();"

on a div, button, image, just about anything you want to "initiate" your post

Upvotes: 0

Gareth Parker
Gareth Parker

Reputation: 5062

No. You can't. PHP is NOT a dynamic language, and it does NOT run client side. PHP runs once, and only once, and that's when the page is loaded. It runs its script and it stops. What you can do is get javascript to do an AJAX call. AJAX is basically a way of passing information to another page and getting the data, all in JavaScript. Do some research on it, but in short, you can't make PHP run once it's already been run

Upvotes: 1

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