Resizing Uploaded Images

ebzeal · June 1, 2011

Please, I need help with resizing uploaded images. Copied below is the code for image upload ( which I tagged "upload.php")

<?php
// define a constant for the maximum upload size
define ('MAX_FILE_SIZE', 51200);

if (array_key_exists('upload', $_POST)) {
  // define constant for upload folder
  define('UPLOAD_DIR', 'C:/upload_test/');
  // convert the maximum size to KB
  $max = number_format(MAX_FILE_SIZE/1024, 1).'KB';
  // create an array of permitted MIME types
  $permitted = array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/png');
  
  foreach ($_FILES['image']['name'] as $number => $file) {
    // replace any spaces in the filename with underscores
$file = str_replace(' ', '_', $file);
    // begin by assuming the file is unacceptable
    $sizeOK = false;
    $typeOK = false;
  
    // check that file is within the permitted size
    if ($_FILES['image']['size'][$number] > 0 || $_FILES['image']['size'][$number] <= MAX_FILE_SIZE) {
    $sizeOK = true;
}

    // check that file is of an permitted MIME type
    foreach ($permitted as $type) {
      if ($type == $_FILES['image']['type'][$number]) {
        $typeOK = true;
    break;
    }
  }
  
    if ($sizeOK && $typeOK) {
      switch($_FILES['image']['error'][$number]) {
    case 0:
          // check if a file of the same name has been uploaded
//	  if (!file_exists(UPLOAD_DIR.$file)) {
	    // move the file to the upload folder and rename it
	    $success = move_uploaded_file($_FILES['image']['tmp_name'][$number], UPLOAD_DIR.$file);
	   // }
	/*  else {
	    // get the date and time
	    ini_set('date.timezone', 'Europe/London');
	    $now = date('Y-m-d-His');
	    $success = move_uploaded_file($_FILES['image']['tmp_name'][$number], UPLOAD_DIR.$now.$file);
	    }*/
	  if ($success) {
            $result[] = "$file uploaded successfully";
        }
	  else {
	    $result[] = "Error uploading $file. Please try again.";
	    }
      break;
    case 3:
	  $result[] = "Error uploading $file. Please try again.";
	default:
          $result[] = "System error uploading $file. Contact webmaster.";
    }
      }
    elseif ($_FILES['image']['error'][$number] == 4) {
  $result[] = 'No file selected';
  }
else {
      $result[] = "$file cannot be uploaded. Maximum size: $max. Acceptable file types: gif, jpg, png.";
  }
}
  }
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Multiple file upload</title>
</head>

<body>
<?php
// if the form has been submitted, display result
if (isset($result)) {
  echo '<ol>';
  foreach ($result as $item) {
    echo "<strong><li>$item</li></strong>";
}
  echo '</ol>';
  }
?>
<form action="" method="post" enctype="multipart/form-data" name="multiUpload" id="multiUpload">
    <p>
        <label for="image1">File 1:</label>
	<input type="hidden" name="MAX_FILE_SIZE" value="<?php echo MAX_FILE_SIZE; ?>" />
        <input type="file" name="image[]" id="image1" />
    </p>
    <p>
        <label for="image2">File 2:</label>
        <input type="file" name="image[]" id="image2" />
    </p>
    <p>
        <input name="upload" type="submit" id="upload" value="Upload files" />
    </p>
</form>
</body>
</html>

This works fine , except that it only uploads to C:/upload_test instead of the images folder (../img/)

Can you please help with the codes for creating thumbnails while retaining the original upload. Thanks

xyph · June 1, 2011

Tons of tutorials out there to do this.

http://net.tutsplus.com/tutorials/php/image-resizing-made-easy-with-php/ - A tutorial with a class for you to do it already.

fugix · June 1, 2011

also, it doesnt upload to you img dir because you stated that it should go to the dir above that here

define('UPLOAD_DIR', 'C:/upload_test/');

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