Simplified Image Resizing with PHP

[coldert]

I think it would be better to send the filename to your function, instead of $mysock[0] and $mysock[1].

Something like this (I haven't tested it, so it might as well explode ...):

function imageResize($image, $target) {
list($width, $height) = getimagesize($image);

[...]

}

And then call the function like this:

<img src="images/sock001.jpg" <?php echo imageResize("images/sock001.jpg", 150); ?>>

[sequoia mcdowell]

Hmm... This isn't really resizing an image using PHP, it's resizing an image OUTPUT using HTML, and setting the h/w values with PHP. If anyone's interested in resizing the actual image w/PHP, I found a tut here: 4wordsystems.com/php_image_resize.php
(don't mean to draw people away, if there is such a tutorial on this site, please replace my link w/yours)
-Sequoia

[sorin21us]

I used this function

function createthumb($name,$filename,$new_w,$new_h)
{
$system=explode(".",$name);
if (preg_match("/jpg|jpeg/",$system[1])){$src_img=imagecreatefromjpeg($name);}
if (preg_match("/png/",$system[1])){$src_img=imagecreatefrompng($name);}
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x > $old_y) 
{
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x < $old_y) 
{
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y) 
{
$thumb_w=$new_w;
$thumb_h=$new_h;
}
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); 
if (preg_match("/png/",$system[1]))
{
imagepng($dst_img,$filename); 
} else {
imagejpeg($dst_img,$filename); 
}
imagedestroy($dst_img); 
imagedestroy($src_img); 
} 

from here.

See the DEMO when you login with demo and demo, and adding a photo to the demo profile.

[Joel]

Hi!

This is a really good little tut/code snippet! Exactly what I was looking for!

Thank you for sharing this!

It´s really appreciated!

[Kelvin]

Hi, I think you are not calling the function properly. You should use another variable to store the result of the function call, then echo the variable. Like this:
<img src="xxx.jpg" <?php $result = imageResize($bigger[0],$bigger[1], 500);
echo $result ?>>
When you echo result, it will output width="xx", height="xx"

[gibsonse]

So how would I insert the result of $imageResize in the following PHP code?

$imageurl = "<img src='".$prodimagedir.urlencode($row["product_image_small"])."' border='0' width='100' height='100' class='item_thumb'>";

Thanks much for all the tips!
sg

[Pablo Fierro]

Hello, This script is not working for my I do everything but I get no width, or height properties on the outcome html.

[cyberpulp]

Thanks Greg, works a treat, had an issue with IE resizing images after viewed full size and returning to a page viewing thumbs with size controlled by % of width and height, but this little gem sorted it.

[rocoso]

i rewrote that to suit my needs. Thought i would share it
function imageResize($image,$target) {

$img = getimagesize($image);
$width = $img[0];
$height = $img[1];

if ($width > $height) {
$percentage = ($target / $width);
} else {
$percentage = ($target / $height);
}

$width = round($width * $percentage);
$height = round($height * $percentage);

return "width=\"$width\" height=\"$height\" border=\"0\"";

}

[ZackVix]

Thanks for the script. Everything is fine. However, the last part with img tag won't work because you are not actually printing out what is being returned. it should be changed to:


<img src="images/sock001.jpg" <?=imageResize($mysock[0],
$mysock[1], 150); ?>>

Then it should work :) Thanks for the script pretty easy and fast.

[ZackVix]

Thanks for the script. Everything is fine. However, the last part with img tag won't work because you are not actually printing out what is being returned. it should be changed to:


<img src="images/sock001.jpg" <?=imageResize($mysock[0],
$mysock[1], 150); ?>>

Then it should work :) Thanks for the script pretty easy and fast.

[antony09]

Try to use this picture resizing tool It works well! This is site softorbits.com/batch_picture_resize/

[eruna]

all this does is change the html attributes

[spikeZ]

please note the date that this was first published: Jul 23, 2004

Alot has changed since then!