Upload by FTP with PHP, not sending the image

Question

Based on the code below I am trying to send an image through the FTP protocol, but the file is not being sent, something tells me it is in the file path, I inform the absolute path.

<?php

$arquivo = $_FILES["fileToUpload"]["name"];
$servidor = 'servidor';
$target_dir = "destino";
$con_id = ftp_connect($servidor) or die( 'Não conectou em: '.$servidor );
ftp_login( $con_id, 'usuario', 'senha' );

    if ($arquivo != "" && $_FILES != NULL){
            $uploadOk = 1;
        //echo $image_name;die;
        $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
        $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
        // Check if file already exists
        if (file_exists($target_file)) {
            echo "Sorry, file already exists.";die;
            $uploadOk = 0;
        }
        // Check file size
        if ($_FILES["fileToUpload"]["size"] > 500000) {
            echo "Sorry, your file is too large.";die;
            $uploadOk = 0;
        }
        // Allow certain file formats
        if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
        && $imageFileType != "gif" ) {
            echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";die;
            $uploadOk = 0;
        }
        // Check if $uploadOk is set to 0 by an error
        if ($uploadOk == 0) {
            echo "Sorry, your file was not uploaded.";die;
        // if everything is ok, try to upload file
        } else {
            ftp_put( $con_id, $target_dir.$arquivo['name'], $arquivo['tmp_name'], FTP_BINARY );
        }
    }