Upload image a nefunkční podmínka

<?php
if(isset($_FILES['files']))    {
    foreach($_FILES['files']['tmp_name'] as $key => $tmp_name){
        $file_name = preg_replace  ("~[^0-9a-zA-Z\.]~","" ,$key.$_FILES['files']['name'][$key]);
        $file_size =$_FILES['files']['size'][$key];
        $file_tmp =$_FILES['files']['tmp_name'][$key];
        $file_type=$_FILES['files']['type'][$key];
        $errors    =    array();
        if($file_size > 16777216){
            $errors[]    =    "<div id='error'><li>Soubor může mít maximálně <b>2 MB</b></li></div>";
        }
        if($file_type    !=    'image/png'    &&    $file_type    !=    'image/gif'    &&    $file_type    !=    'image/jpg'    &&    $file_type    !=    'image/jpeg')    {
            $errors[]    =    "<div id='error'><li>Jsou podporovány pouze soubory typu <b>jpg</b>, <b>jpeg</b>, <b>png</b>, <b>gif</b>!</li></div>";
        }
        $query    =    '...';
        
        $desired_dir= "logo/";
        if(count($errors)    >    0){
            foreach ($errors as $errorr);
            echo $errorr;
        }
        else    {
            if(is_dir($desired_dir)==false){
                mkdir("$desired_dir", 0777);
            }
            if(is_dir("$desired_dir/".$file_name)==false){
                move_uploaded_file($file_tmp,"logo/".$file_name);
            }else{                                  
                $new_dir="logo/".$file_name.time();
                rename($file_tmp,$new_dir) ;
            }
            mysqli_query($con, $query);
        }
    }
}
?>