Uploaden werkt niet(extensie verkeerd)

<?php
if(isset($_POST['upload'])){
$map = "http://www.gangsta-world.net/images/user"; // map zonder slash
$filenaam = $_FILES['file']['name'];
$filesize = $_FILES['file']['size'];
$filetype = $_FILES['file']['type'];
$filetemp = $_FILES['file']['tmp_name'];
$ext = array('jpg','gif','png','jpeg','bmp');
$exte = explode('.', $filenaam);
$extension = $exte[count($exte) - 1];
if(!in_array($extension, $ext)){
echo "This is an invalid extension.";
}
elseif($filesize > (300 * 300)){
echo "The file is too big.";
}
else{
move_uploaded_file($filetemp, $map."/".$filenaam);
$query = "UPDATE `users` SET `image_1` = 'http://www.gangsta-world.net/images/user/".$filenaam."' WHERE `id` = '".$user['id']."'";
mysql_query($query) or die(mysql_Error());

echo "The picture has been uploaded.";
}

}
?>

<?php
if(isset($_POST['upload'])){
$map = "http://www.gangsta-world.net/images/user"; // map zonder slash
$filenaam = $_FILES['file']['name'];
$filesize = $_FILES['file']['size'];
$filetype = $_FILES['file']['type'];
$filetemp = $_FILES['file']['tmp_name'];
$ext = array('jpg','gif','png','jpeg','bmp');
$exte = explode('.', $filenaam);
$extension = $exte[count($exte) - 1];
if(!in_array($extension, $ext)){
echo "This is an invalid extension.";
}
elseif($filesize > (300 * 300)){
echo "The file is too big.";
}
else{
move_uploaded_file($filetemp, $map."/".$filenaam);
$query = "UPDATE `users` SET `image_1` = 'http://www.gangsta-world.net/images/user/".$filenaam."' WHERE `id` = '".$user['id']."'";
mysql_query($query) or die(mysql_Error());
 
echo "The picture has been uploaded.";
}
 
}
?>

<?php

$exte = explode('.', $filenaam);
$count = count($exte);
$count = $count-1;
$extension = $exte[$count];

?>

<?php
 
$exte = explode('.', $filenaam);
$count = count($exte);
$count = $count-1;
$extension = $exte[$count];
 
?>

<?php

$exte = explode('.', $filenaam);
$extension = $exte[count($exte) - 1];

?>

<?php
 
$exte = explode('.', $filenaam);
$extension = $exte[count($exte) - 1];
 
?>