Resizing Images through img src

chillerkid

I need some expert help here.

I'm creating a website that allows images to be uploaded and displayed. However, if a user uploads a huge image, the website will display it big.

I cant figure out how am i suppose to resize the image using the syntax below. Maybe i'm doing it all wrong as i cant think this through.

I cant do this width="'.$width/4.'" as that doesn't work.

<?php
     list($width,$height,$type,$attr) = getimagesize("my_image.jpg");

echo "<img src="my_image.jpg" width="'.$width.'" height="'.$height.'">";

?>

Please help

dagon

your better to resize the actual image rather than use html to resize how its displayed.

Krik

The value of "$width" and "$height" is a number. You should be able to perform any math function on it.

chillerkid

Krik;10961218 wrote:
The value of "$width" and "$height" is a number. You should be able to perform any math function on it.

Got it working now...

I needed to put $width/4 in a variable before i can use it


<?php
     list($width,$height,$type,$attr) = getimagesize("my_image.jpg");

$wid = $width/4;
$hei = $height/4

echo "<img src="my_image.jpg" width="'.$wid.'" height="'.$hei.'">";

?>

That works quite well actually.. now aside from that if people are uploading smaller image, the size will also divide by 4. any idea how to come across that?

dagon

chillerkid;10961223 wrote:
That works quite well actually.. now aside from that if people are uploading smaller image, the size will also divide by 4. any idea how to come across that?

check the size, decide what changes to do, if any, based on the size. This is still a bad approach resizing the actual file on upload is a much better idea.

If 10 people upload avatars for a forum (example scenario) of 10 megs, you are forcing people to download 100meg every time (display size does not change file size) they load the page. if you resized them to 10k each its 100k, big difference for both your users and site bandwidth.

chillerkid

dagon;10961225 wrote:
check the size, decide what changes to do, if any, based on the size. This is still a bad approach resizing the actual file on upload is a much better idea.

Thats true but if only i knew how to resize image upon uploading

dagon

chillerkid;10961226 wrote:
Thats true but if only i knew how to resize image upon uploading

well you could ask us that question, or ask google, there are lots of pages on it, its very common.

chillerkid

dagon;10961227 wrote:
well you could ask us that question, or ask google, there are lots of pages on it, its very common.

Thanks but i still think doing a google search complicate things for me as i'm still new to PHP

So does anyone here know how to resize image upon uploading?

dagon

chillerkid;10961230 wrote:
Thanks but i still think doing a google search complicate things for me as i'm still new to PHP

NOOOOO google first, second and third, waist our time fourth.