how to get value from a form before submit - php

Question

i want to get the values from a form before its action redirect it.
for example in this form, i want to grab the "text_one" and send it to database before it be redirected to google. I also want "text_one" in google too.what should i do?
<form method="post" action="google.com">
<input type="text" name="text_one">
<input type="submit">
</form>

Answer 1

try this ...
<form method="post" onsubmit="return getdata()" action="google.com">
<input type="text" name="text_one" id="text_one">
<input type="submit">
</form>
<script>
function getdata(){
var txtOne = document.getElementById('text_one').value;
// Do Something
}
</script>

Answer 2

You can change the action to "yourscript.php" and do s.th. like:
<?php //yourscript.php
//save $_POST['text_one'] to Database
header('Location: http://google.com');
?>
Or you can call the "yourscript.php" with ajax to do it in the background.

Answer 3

Try this :
echo (isset($_POST['text_one']) ? $_POST['text_one'] : '');
or Use Ajax Ajax is the answer of your question

Answer 4

For a pure PHP solution, you can work with the idea presented by #v.eigler. In order to create a POST request to a Google server (or what ever server you want), you just need to use some library to make the HTTP request, I strongly recommend you to take a look at the Guzzle library.
Using this should be easy enough, you just need to redirect the form handling to a script that you own, do your own processing and then create an HTTP post to the real destination.

Answer 5

I do it with little complexity.
I change your form action handler.
<form method="post" action="yourscript.php">
<input type="text" name="text_one">
<input type="submit">
</form>
Now, Its time to handle it server side. I have put comments for explanation.
<!-- yourscript.php -->
<?php
echo $_POST['text_one'];
// also do required server side operation.
?>
<!-- note: Action part is google.com -->
<form id="myform" method="post" action="google.com">
<!-- Note: value of input already set.-->
<input type="text" value=<?php echo $_POST['text_one'];" ?> name="text_one">
<input type="submit">
</form>
<script language="JavaScript">
// submit your form as soon as page loaded.
document.myform.submit();
</script>