Add more Images by php form - php

Question

I want to prepare 5 photo upload form and user need to select all 5 photo at once and the submit the form
then i need to store all 5 photos in the Target Directory by renaming image as "1.jpg, 2.jpg, 3.jpg, 4.jpg, 5.jpg". I stored only one image but after add For loop for save more than one file its not working ....please support.
// Image Upload FORM
<form action="saveinntion.php" method="post" enctype="multipart/form-data">
<h1>Upload Your Innovation</h1
<fieldset>
<legend><span class="number">4</span>Upload Images</legend>
<input type="file" name="img1" id="img1" >
</br>
<input type="file" name="img2" id="img2">
</br>
<input type="file" name="img3" id="img3">
</br>
<input type="file" name="img4" id="img4">
</br>
<input type="file" name="img5" id="img5">
</br>
</fieldset>
<button type="submit">Submit</button>
</form>
saveinntion.php file
<?php
include("dbconnection.php");
$target_dir = "Upload/";
$img=$_POST['img'];
for ($i = 0; $i < 5; $i++) {
$target_file = $target_dir . basename($_FILES['$img[]']["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
if (file_exists($target_file)) {
echo "Sorry, file already exists.";
$uploadOk = 0;
}
if ($_FILES['$img[]']["size"] > 500000) {
echo "Sorry, your file is too large.";
$uploadOk = 0;
}
if($imageFileType != "jpg" && $imageFileType != "jpeg" ) {
echo "Sorry, only JPG & JPEG files are allowed.";
$uploadOk = 0;
}
if ($uploadOk == 0) {
echo "Sorry, your file was not uploaded.";
} else {
if (move_uploaded_file($_FILES['$img[]']["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES['$img[]']["name"]). " has been uploaded.";
} else {
echo "Sorry, there was an error uploading your file.";
}
}
}
header("Location: upload1.php?id=$msg");
?>

Answer 1

Your problem is with your naming. as #Twinfriends said in the command it is highly unlikely to upload any file
replace $_FILES['$img[]'] with $_FILES['img'.($i+1)] in your code.
line # 5
$target_file = $target_dir . basename($_FILES['img'.($i+1)]["name"]);
line #13
if ($_FILES['img'.($i+1)]["size"] > 500000) {
line #25
if (move_uploaded_file($_FILES['img'.($i+1)]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES['img'.($i+1)]["name"]). " has been uploaded.";
To renaming file.
$imageFileType = pathinfo($_FILES['img'.($i+1)]["name"],PATHINFO_EXTENSION);
$target_file = $target_dir . ($i+1).".".$imageFileType;