May 22nd, 2003, 02:23 PM
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Contributing User
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Join Date: Apr 2003
Posts: 51
Time spent in forums: 19 m 41 sec
Reputation Power: 6
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turning script on it's head...
Hi,
Thanks for writing this tutorial, it's really helped me loads ;-)
What I'm trying to do is set a max width and height for the main pic (with ratio) and save that and then make a set width / height thumbnail without ratio.
I've got it all working fine, except 1 thing. The quality of the images once they've been resized is awful, is there any way of making this better ???
// here's my code...
PHP Code:
<?php
if($_POST['upload'] == 'now')
{
$report_img = '';
$MAX_IMG_WIDTH = 700;
$MAX_IMG_HEIGHT = 500;
$THUMB_WIDTH = 40;
$THUMB_HEIGHT = 40;
$IMG_BIG = "./big";
$IMG_THUMB = "./thumbs";
$fileName = explode(".", $_FILES['strFile']['name']);
$name = str_replace(' ', '_', $fileName[0]);
error_reporting(53); //errors may happen for no reason, so this killes them, we will use our own error reporting
$acceptedTypes = array('image/jpeg','image/jpg'); //
if(!in_array($_FILES['strFile']['type'], $acceptedTypes) || trim($_FILES['strFile']['tmp_name']) == "" || trim($_FILES['strFile']['tmp_name']) =="none")
{
echo 'You didnt suply an image a valid image.';
}
else
{
$img_orig_size = getimagesize($_FILES['strFile']['tmp_name']);
$img_orig_width = $img_orig_size[0];
$img_orig_height = $img_orig_size[1];
//$img_original = ImageCreateFromJpeg($_FILES['strFile']['tmp_name']);
if($img_orig_width >= $MAX_IMG_WIDTH || $img_orig_height >= $AX_IMG_HEIGHT)
{
$mlt_w = $MAX_IMG_WIDTH / $img_orig_width;
$mlt_h = $MAX_IMG_HEIGHT / $img_orig_height;
$mlt = $mlt_w < $mlt_h ? $mlt_w:$mlt_h;
#### Calculate new dimensions
$img_new_width = round($img_orig_width * $mlt);
$img_new_height = round($img_orig_height * $mlt);
$img_resized = ImageCreate($img_new_width, $img_new_height);
imagecopyresized($img_resized, ImageCreateFromJpeg($_FILES['strFile']['tmp_name']), 0 , 0 , 0 , 0, $img_new_width, $img_new_height, $img_orig_width, $img_orig_height);
$time = time();
$timeSub = substr($time, 4, 4);
$image_stored = $timeSub . '_' . $_POST['strTitle'] . "_$name.jpg";
ImageJPEG($img_resized, "$IMG_BIG/$image_stored");
ImageDestroy($img_resized);
}
else
{
$time = time();
$timeSub = substr($time, 4, 4);
$image_stored = $timeSub . '_' . $_POST['strTitle'] . "_$name.jpg";
ImageJPEG($img_original, "$IMG_BIG/$image_stored");
}
echo "Image Name: {$_FILES['strFile']['name']}<br>
New Image Name: $image_stored<br>
Width: $img_orig_width<br>
Height: $img_orig_height<br>
Max Image Size for Thumbnails: $IMG_WIDTH x $IMG_HEIGHT<br>
<a target='_blank' href='$IMG_BIG/$image_stored'>View Original Image</a><br><br>";
if($img_orig_width <= $THUMB_WIDTH || $img_orig_height <= $THUMB_HEIGHT)
{
echo "<b>The image that you selected didnt need to be resized</b>.<br>You may want to upload a bigger picture.";
}
else
{
//the image will need to be resized, as its too big. It will be a thumbnail
/*$mlt_w = $IMG_WIDTH / $img_orig_width;
$mlt_h = $IMG_HEIGHT / $img_orig_height;
$mlt = $mlt_w < $mlt_h ? $mlt_w:$mlt_h;
#### Calculate new dimensions
$img_new_width = round($img_orig_width * $mlt);
$img_new_height = round($img_orig_height * $mlt);*/
$img_resized = ImageCreate($THUMB_WIDTH, $THUMB_HEIGHT);
imagecopyresized($img_resized, ImageCreateFromJpeg($_FILES['strFile']['tmp_name']), 0 , 0 , 0 , 0, $THUMB_WIDTH, $THUMB_HEIGHT, $img_orig_width, $img_orig_height);
$img_name = "tn_$image_stored";
Imagejpeg($img_resized, "$IMG_THUMB/$img_name");
ImageDestroy($img_resized);
$mg_new_size = filesize("$IMG_THUMB/$img_name");
echo "<b>Image Resized</b><br>
Width: $img_new_width<br>
Height: $img_new_height<br>
FileSize: $mg_new_size (in bytes)<br>
<img src='$IMG_THUMB/$img_name'>";
}
}
}
else
{
?>
Thanks in advance,
Jon
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