Extensie/MIME check

<?php

### Set extensions and mime-types (lowercase)
$extensions = array('jpeg', 'jpg', 'gif', 'png');
$mimetypes = array('image/jpeg', 'image/jpg', 'image/gif', 'image/png');

### Function
function filecheck($file)
{
    ### Set extension and mime-type in function
    global $extensions;
    global $mimetypes;

    ### Get pathinfo
    $pathinfo = pathinfo($file['name']);

    ### Make extension lowercase
    $extension = strtolower($pathinfo['extension']);

    ### Make mime-type lowercase
    $mimetype = strtolower($file['type']);

    ### Check entension and mime-type
    if (in_array($extension, $extensions) AND in_array($mimetype, $mimetypes))
    {
        ### Return TRUE
        return true;
    }
    else
    {
        ### Return FALSE
        return false;
    }
}
?>