functions.php

// PHOTO PLANT ################################################################################################################
function photoPlant($pID){
  // db
  include "includes/dbConfig.php";
  // init
  $out = null;
  // gen hash
  $varA = microtime();
  $varB = time();
  $varC = $varA . $varB;
  $hash = md5($varC);
  // prepare upload
  $currentDir = getcwd();
  $uploadDirectory = "/gallery/";

  $errors = []; // Store all foreseen and unforseen errors here

  $fileExtensions = ['jpeg','jpg','png', '']; // Get all the file extensions, including empty for mobile
  // reformat empty file extension
  if ($fileExtension === ""){
    $fileExtension = "jpg";
  }

  $fileName = $_FILES['photo']['name'];
  $fileTmpName = $_FILES['photo']['tmp_name'];
  $fileSize = $_FILES['photo']['size'];
  $fileType = $_FILES['photo']['type'];
  $fileExtension = strtolower(end(explode('.',$fileName)));
  // reformat filename
  $fileName = $hash . "." . $fileExtension;

  $uploadPath = $currentDir . $uploadDirectory . basename($fileName);


  if (! in_array($fileExtension,$fileExtensions)) {
      $errors[] = "This file extension is not allowed. Please upload a JPEG or PNG file";
  }

  if ($fileSize > 8000000) {
      $errors[] = "This file is more than 8MB. Sorry, it has to be less than or equal to 8MB";
  }

  // rotate img to exif
  $errors = array_filter($errors);
  if (empty($errors)){
    $img = new Imagick($fileTmpName);
    $orient = $img->getImageOrientation();
    if($orient === 6){
      // we need to rotate it 90deg
      $img->rotateImage("rgba(255, 255, 255, 0.0)", 90);
    }
    if ($orient === 3){
      // we need to rotate it 180deg
      $img->rotateImage("rgba(255, 255, 255, 0.0)", 180);
    }
    $img->writeImage("gallery/" . $fileName);
  }
  else{
    $out .= "Errors on upload";
  }

  // store img on db
  // prepare data
  $timeStamp = time();
  // query
  $query = mysqli_query($con, "INSERT INTO photo_table (photo_parent_id, photo_name, photo_timestamp) VALUES ($pID, '$fileName', $timeStamp)");
  // run query
  if (!$query){
    $out .= mysqli_error($con);
  }
  else{
    $out .= "ok";
    // $out .= $orient;
  }
  // return
  return $out;
}

grow.php

// action photo plant
if (isset($_POST["plantPhotoID"])){
  if (photoPlant($_POST["plantPhotoID"]) === "ok"){
    header("Location: ".$_SERVER["PHP_SELF"]."?view=grow&growID=".$_GET["growID"]."");
  }
  else{
    // for debug reasons ill give feedback on this one
    print photoPlant($_POST["plantPhotoID"]);
    return;
  }
}