没有输入php中的if子句[重复]

I've got a huge problem with my php-file. I want to redirect to another site through header(). But the if-clause doesn't get accepted and I can't think of any problem with it. I tried everything, but it won't work. Could you help me?

<?php

session_start();
include("php/connect.php"); //connection to database
$test = 0;

if($test == 0){
    header("Location: /nextsite.php");
}
?>

</div>

This is because the header is already sent to the client before your if clause is executed. I normally use a buffer before loading the page in php.

<?php
ob_start();
session_start();
include("php/connect.php"); //connection to database
$test = 0;

if ($test == 0) {
    header("Location: /nextsite.php");
}

ob_end_flush();
?>

Note that, the client can only view the page after the entire html has been downloaded. So it might be better to use ob_end_flush() after your if clause.