Image resizing

[Anon]

What is the best way to resize the dimensions of a .jpeg file using PHP?

[jcornett]

Below I've included some code I use often when dealing with images of unknown size. $image holds the name of the image file in this example and it will appropriately resize the photo to be the correct height based on the fixed width you enter for the $width variable.

I used this for a real estate web site (www.gsh.com) to resize the agent photos to a more manageable size. I had some agents uploading photos that were 1600x1200! 😉

<?php

$size = @GetImageSize("<path to photo>/$image");
if ($size[0] == 0) {
echo "No Image Available";
} else {
$width = 120; // Use whatever width you want here
$percent = ($width/$size[0]);
$temp = ($size[1]*$percent);
$newheight = sprintf("%d", $temp);
echo "<img src='$image' width='$width' height='$newheight'>";
}

?>

If you have any questions, feel free to e-mail me.

John Cornett
Senior Development Engineer
Web Teks, Inc.
http://www.web-teks.com
[e-mail]

[iguana]

Hi John,

Thanks for the reply. Though what I really meant was how do I resize a jpeg file to a smaller file. So read file -> resize -> save as other filename.

The way you described is also good, but you will still have a high load time if the image is 1600x1200 and you're only showing for example 400x300.

[guidocom]

Hi there,
maybe you tried this already. Best way I found is not to allow BIG pictures to be uploaded setting maximum file size directly in the file tag:

<input type="hidden" name="max_file_size value=15360">
<input type="file" name="picture1" class=adstextsmall>

It works and I solve problems of finding HUGE immages on the server.

Ciao
Gianguido