Scroll through the values of an input file in PHP?

Question

I’m trying to go through an array of various images in PHP, however, I’m not getting it, follow the code below:

HTML:

 <input type="file" name="img[]" onchange="this.parentNode.setAttribute('title', this.value.replace(/^.*[\\/]/,''))" />
 <input type="file" name="img[]" onchange="this.parentNode.setAttribute('title', this.value.replace(/^.*[\\/]/,''))" />
 <input type="file" name="img[]" onchange="this.parentNode.setAttribute('title', this.value.replace(/^.*[\\/]/,''))" />

PHP:

    $tipos_img = array(
    "image/jpg",
    "image/png",
    "image/jpeg"
   );
   $verifica_quant_img = 0;
   $caminho_fixo = "itens_fixos/imgjogos/";
 foreach ($_FILES['img'] as $img){    
    if (!empty($img['name'])){
          $verifica_quant_img = $verifica_quant_img + 1;
        $caminho = "itens_fixos/imgjogos/".$img['name'];
    if (!in_array($tipos_img, $img['type'])){
     echo "<script language='javascript' type='text/javascript'>alert('Os formatos de imagens aceitos são, 'JPG','PNG' e 'JPEG'.');window.location.href='indexjogo.php';</script>";
        exit;
    }
    if ($img['size'] > 3145728){
        echo "<script language='javascript' type='text/javascript'>alert('Tamanho máximo das imagens é de 3MBs.');window.location.href='indexjogo.php';</script>";
        exit;
    }
    if (file_exists($caminho)){
            echo "<script language='javascript' type='text/javascript'>alert('A imagem"+$img['name']+" já existe.');window.location.href='indexjogo.php';</script>";
        exit;
    }
    }
}

HERE IS THE MISTAKE: