Upload images with ajax-php (Part 2/2)

3. The upload-file.php 

<?php
session_start(); // start up your PHP session!
/*timestamp to get unique names*/
  $timestampfile = time();
    $uploaddir= './images/prods/';
    $file_dimension_limit =600;
 if (isset($_FILES["upload-image"]) && $_FILES["upload-image"]["error"] === UPLOAD_ERR_OK)
{

 $my_image = array_values(getimagesize($_FILES['upload-image']["tmp_name"]));
  //view new array
//print_r($my_image);
  //use list on new array
list($width, $height, $type, $attr) = $my_image;
if($width>$file_dimension_limit  || $height>$file_dimension_limit )
{echo    "<result_flag><result>error</result>";
echo    "<reason>file_size</reason>";
echo    "<sessionId>-1</sessionId></result_flag>";
exit();
}
if($type<>2) //not a JPG image
{echo    "<result_flag><result>error</result>";
echo    "<reason>notJPG</reason>";
echo    "<sessionId>-1</sessionId></result_flag>";
exit();
}
$file = $uploaddir . basename($_FILES['upload-image']['name']);
$ftmp = $_FILES['upload-image']['tmp_name'];
$oname = $_FILES['upload-image']['name'];

$extension = strstr($oname, ".");
$fname = $uploaddir.$timestampfile.$_FILES['upload-image']['name'];
$oname = $timestampfile.$_FILES['upload-image']['name'];
//make a safe file
$oname= str_replace("#", "No.", $oname);
$oname= str_replace("$", "Dollar", $oname);
$oname= str_replace("%", "Percent",$oname);
$oname= str_replace("^", "", $oname);
$oname= str_replace("&", "and", $oname);
$oname= str_replace("*", "", $oname);
$oname= str_replace("?", "", $oname);

if(move_uploaded_file($ftmp, $fname)){

$img = new img('./images/prods/'.$oname);
$img->resize(170,170,true);
  $img->store('./images/prods/medium/'.$oname);
$img->resize();
  $img->store('./images/prods/thumbs/'.$oname);

$_SESSION['image_counter']=$_SESSION['image_counter'] 1;
$c = $_SESSION['image_counter'];
if($_SESSION['next_image']==1) $_SESSION['image1'] = $oname;
if($_SESSION['next_image']==2) $_SESSION['image2'] = $oname;
if($_SESSION['next_image']==3) $_SESSION['image3'] = $oname;
   
//if($c == 1) $_SESSION['next_image'] = $c 1;
//if($c == 2) $_SESSION['next_image'] = $c 1;
//if($c == 3) $_SESSION['next_image'] = 0;
$_SESSION['next_image']=$_SESSION['next_image'] 1;
echo    "<result_flag><result>success</result>";
    echo    "<sessionId>".$_SESSION['image_counter']."</sessionId>";
    echo    "<fileName>".$oname."</fileName></result_flag>";
}
else { //error in uploading
   echo    "<result_flag><result>error</result>";
   echo    "<sessionId>-1</sessionId></result_flag>";
   } }
   else { //error in file
   echo    "<result_flag><result>error</result>";
   echo    "<sessionId>-2</sessionId></result_flag>";
}
class img {
var $image = '';
var $temp = '';

function img($sourceFile){
if(file_exists($sourceFile)){
$this->image = ImageCreateFromJPEG($sourceFile);
} else {
$this->errorHandler();
}
return;
}

function resize($width = 100, $height = 100, $aspectradio = true){
$o_wd = imagesx($this->image);
$o_ht = imagesy($this->image);
if(isset($aspectradio)&&$aspectradio) {
$w = round($o_wd * $height / $o_ht);
$h = round($o_ht * $width / $o_wd);
if(($height-$h)<($width-$w)){
$width =& $w;
} else {
$height =& $h;
}
}
$this->temp = imageCreateTrueColor($width,$height);
imageCopyResampled($this->temp, $this->image,
0, 0, 0, 0, $width, $height, $o_wd, $o_ht);
$this->sync();
return;
}
function sync(){
$this->image =& $this->temp;
unset($this->temp);
$this->temp = '';
return;
}
function _sendHeader(){
header('Content-Type: image/jpeg');
}
function show(){
$this->_sendHeader();
if(!ImageJPEG($this->image))
$this->errorHandler();
return;
}
function errorHandler($erron_num=0){
if ($error_num == 1)
echo "Very big image";
else if($erron_num == 2)
echo "Only .jpg fotos supported";
else
echo "error";
exit();
}
function store($file){
ImageJPEG($this->image,$file);
return;
}
function watermark($pngImage, $left = 0, $top = 0){
ImageAlphaBlending($this->image, true);
$layer = ImageCreateFromPNG($pngImage);
$logoW = ImageSX($layer);
$logoH = ImageSY($layer);
ImageCopy($this->image, $layer, $left, $top, 0, 0, $logoW, $logoH);
}
}
?>

4. delete-file.php 

  <?php
 session_start(); // start up your PHP session!

$deletedir = './images/prods/';
//$file = $deletedir . basename($_FILES['data']);
$image = $_POST["name"];
$image_id = $_POST["id"];


$file = $deletedir . $image;
$deletedir_thumbs = './images/prods/thumbs/';
$deletedir_medium = './images/prods/medium/';
$file_delete = $deletedir_thumbs . $image;
$file_delete2 = $deletedir_medium . $image;

if (unlink($file) && unlink($file_delete)&& unlink($file_delete2)) {
echo "true";
 $_SESSION['image_counter']=$_SESSION['image_counter']-1;
 $c = $_SESSION['next_image']-1;
 if($image == $_SESSION['image1'])
 { // the first image is deleted so we sift all the other fotos
 if($c == 1) { unset($_SESSION['image1']); $_SESSION['next_image'] = 1; }
 if($c == 2) { if(isset($_SESSION['image2']))
{ $_SESSION['image1'] = $_SESSION['image2'];
unset($_SESSION['image2']);
$_SESSION['next_image'] = 2; }
if(isset($_SESSION['image3']))
{ $_SESSION['image1'] = $_SESSION['image3'];
unset($_SESSION['image3']);
$_SESSION['next_image'] = 2; }
}
 if($c == 3) {
if(isset($_SESSION['image2'])) $_SESSION['image1'] = $_SESSION['image2'];
if(isset($_SESSION['image3'])) $_SESSION['image2'] = $_SESSION['image3'];
unset($_SESSION['image3']);
$_SESSION['next_image'] = 3; }
  } //end of delete first image
if($image == $_SESSION['image2'])
 {
 if($c == 3) {
if(isset($_SESSION['image3'])) $_SESSION['image2'] = $_SESSION['image3'];
unset($_SESSION['image3']);
$_SESSION['next_image'] = 3; }
else
{
unset($_SESSION['image2']);
$_SESSION['next_image'] = 2;
}
  }
 if($image == $_SESSION['image3'])
 {unset($_SESSION['image3']); $_SESSION['next_image'] = 3; echo "del=3";}
 }
else {
echo "error";
}


?>

To get all the necessary source files go to: https://github.com/alexopoulos7/Upload-image-ajax