Multiple $_FILES['passport']['type']'s error

[itbeings]

#If upload button is clicked
if(isset($_POST['s_reg'])){
$reg = $_REQUEST['s_reg'];

#Get file extension and size
$msize = $_REQUEST['max_size']; //Max allowed file size
$size = $_FILES['passport']['size']; //Actual file size
$type = $_FILES['passport']['type'];

#Check File type

if($type != 'image/pjpeg' || $type != 'image/gif' || $type != 'image/x-png'){
    $_SESSION['upload'] = "<span class='error'>This image format is not supported!</span>";
}else{

#Check file size
if($size <= $msize){

#if conditions are met, upload file
$file = basename($_FILES['passport']['name']);
$rename_file = $reg.$file; //Rename file with prefix of student registration number
$uploaddir = $passport_dir; //Declared in userconfig.inc.php
$uploadfile = $uploaddir.$rename_file;

if (move_uploaded_file($_FILES['passport']['tmp_name'], $uploadfile)){
   $_SESSION['upload'] = "<span class='response'>Passport uploaded successfully</span>";
   #Update user passport URL
   $p_name_after = $rename_file; //Passport name after upload
        $up_q = "UPDATE students SET passport_url = '".$passport_dir_a.$p_name_after."'
                    WHERE s_reg = '".$reg."'";
        $up_result = $db_q($up_q, $conn);
?>
<script language="javascript" type="text/javascript">
function reloadIt(){
opener.location.reload();
self.close();
}
setTimeout('reloadIt()',3000);
/*setTimeout("opener.location.reload(true)",3000)
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<?php
   
} else {
   $_SESSION['upload'] = "<span class='error'>Passport upload has failed!</span>";
}

}else{
    $_SESSION['upload'] = "<span class='error'>Passport size is too large!</span>";
}
}
}

From the above code I am getting no good result from
if($type != 'image/pjpeg' || $type != 'image/gif' || $type != 'image/x-png'){

all kind of file is not supported with the above if but with
if($type != 'image/pjpeg'){
only .jpeg extension is supported.

what could be the problem?

[bokeh]

if($type != 'image/pjpeg' || $type != 'image/gif' || $type != 'image/x-png'){ 

That code is illogical. You probably wanted something like:

if(!($type == 'image/pjpeg' || $type == 'image/gif' || $type == 'image/x-png')){ 

[itbeings]

No it's correct
if($type != 'image/pjpeg' || $type != 'image/gif' || $type != 'image/x-png'){
$_SESSION['upload'] = "<span class='error'>This image format is not supported!</span>";

if it's not that type return and assign the $_SESSION['upload']

[itbeings]

I gat the solution somewhere else.
Thanks.