Image Gallery passing variables to header location doesnot working? - php

Question

This below mentioned code is written localhost/uploads/gallery.php file. I am including it in another page so it can be a part of header and footer including all my styling. I did it by include('uploads/gallery.php'); into a div.
Everything is working fine except the header location. When I go to the page where gallery is included which is "localhost/index.php?page=media"(localhost/views/media.php). It does not display thumbnails. I have to refresh the page to see thumbnails. Note: the code is written to display thumbnails when they are generated without refreshing the page.
My concern for asking question is, why i have to refresh page to load thumbnails. My header location is not passing variables correctly. I am a complete noob. please help me with this. Shukriya.
<?php
if(isset($_GET['img'])){
if(file_exists("uploads/{$_GET['img']}")) {
ignore_user_abort(true);
set_time_limit(120);
ini_set('memory_limit', '256M');
$src_image = getimagesize("uploads/{$_GET['img']}");
var_dump($src_image);
if($src_image === false) {
die("Wrong Image");
} # Wrong File Size
// Fixed Thumbnail Size
$thumb_width = 144;
$thumb_height = 144;
$thumb_ratio = round (($thumb_width / $thumb_height), 1);
$src_ratio = round (($src_image[0] / $src_image[1]), 1);
if ($src_ratio > $thumb_ratio) {
//Landescape Image dynamic width...
$new_size = array(($src_image[0] * $thumb_height)/$src_image[1], $thumb_height);
$new_pos = array(($new_size[0] - $thumb_width)/2,0);
} elseif ($src_ratio < $thumb_ratio) {
//PORTRAIT Image dynamic Height.....
$new_size = array($thumb_width, ($src_image[1] * $thumb_width)/$src_image[0]);
$new_pos = array(0, ($new_size[1] - $thumb_height)/2);
} elseif($src_ratio == $thumb_ratio) {
//Square
$new_size = array($thumb_width, $thumb_height);
$new_pos = array(0, 0);
}
if($new_size[0] < 1) $new_size[0] = 1;
if($new_size[1] < 1) $new_size[1] = 1;
$imgz = 'uploads/thumbs/'.$_GET['img'];
//GETTING Variable for Source image type. to create resample
if($src_image['mime'] === "image/jpeg"){
$src = imagecreatefromjpeg('uploads/'.$_GET['img']);
} elseif($src_image['mime'] === "image/png"){
$src = imagecreatefrompng('uploads/'.$_GET['img']);
} elseif($src_image['mime'] === "image/gif"){
$src = imagecreatefromgif('uploads/'.$_GET['img']);
}
$thumb = imagecreatetruecolor($thumb_width, $thumb_height);
imagecopyresampled($thumb, $src, 0,0, $new_pos[0], $new_pos[1], $new_size[0], $new_size[1], $src_image[0], $src_image[1]);
//GETTING Variable for Destination thumb image type. to create resample
if($src_image['mime'] === "image/jpeg"){
imagejpeg($thumb, $imgz);
} elseif($src_image['mime'] === "image/png"){
imagepng($thumb, $imgz);
} elseif($src_image['mime'] === "image/gif"){
imagegif($thumb, $imgz);
}
header("Location: uploads/thumbs/{$_GET['img']}");
} /* If file exists */ die();
} // ALL SCRIPT ENDED
if(is_dir('uploads/thumbs') === false) {
mkdir('uploads/thumbs', 0744);
} // Check & Create Directory
$images = glob('uploads/'.'*.{jpg,jpeg,png,gif,JPG,JPEG,PNG,GIF}', GLOB_BRACE);
foreach($images as $image){
$imgs = 'uploads/thumbs/'.substr($image,8);
$nme = substr($image,8);
if(file_exists("$imgs")){
echo "<img src=\"$imgs\" alt=\"$nme\" class=\"img-thumbnail\" />"; //uploads/{$img} , data-toggle=\"modal\" data-target=\"#myModal\"
} else {
echo "<img src=\"?page=media&img=$nme\" alt=\"$nme\" class=\"img-thumbnail\" />";
}
}
?>