[NEED HELP] PHP Form post, get, echo

[★Cooldude★]

PHP Code:

<?PHP
if(isset($_POST['go'])){
$text1 = $_POST['text1'];
$text2 = $_POST['text2'];
$text3 = $_POST['text3'];
$text4 = $_POST['text4'];
header("location: page.php?VAR1=$text1&VAR2=$text2&VAR3=$text3&VAR4=$text4");
}
?>
<form action='' METHOD='POST'>
Text1: <input type='text' name='text1'>
<br>
Text2: <input type='text' name='text2'>
<br>
Text3: <input type='text' name='text3'>
<br>
Text4: <input type='text' name='text4'>
<br>
<input type='submit' name='go' Value='go'>
</form>