<?php
$target_dir = "uploads";
if(!is_dir($target_dir)){
    mkdir($target_dir, 0777, true);
}

$FormInputs = array("form1","form2","form4","form4");

if(isset($_POST["form-action"]) && $_POST["form-action"] == "submit-form") { // check to see if the form was submitted

    foreach($FormInputs as $FormInput){ // loop through form input array
        if(isset($_FILES[$FormInput]['name']) && $_FILES[$FormInput]['name'] != ""){ // check to see if input was submitted with a value
            $target_file = $target_dir . "\". basename($_FILES[$FormInput]['name']); // define the target_file
            $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

            // Check if image file is a actual image or fake image
            $check = getimagesize($_FILES[$FormInput]["tmp_name"]);
            if($check !== false) {
                echo "File is an image - " . $check["mime"] . ".";
                $uploadOk = 1;
            } else {
                echo "File is not an image.";
                $uploadOk = 0;
            }
        }
    }
}
?>

<form action="Test.php" method="post" enctype="multipart/form-data">
    <?php foreach($FormInputs as $FormInput){?>
      <input type="file" name="$FormInput" size="50" maxlength="25"> <br>
    <?php }?>

  <input type="hidden" name="form-action" value="submit-form"/>
  <input type="submit" name="upload" value="Upload">
</form>