how to get image width and height

[whirlpool6]

hello everyone,

 

i am using javascript and php in my web application.

before i display images, i would like to get their width and height. i used the getimagesize() function of php, but there are time when the width and height returned are blanks. i dont know how and i dont know why but there are really times like this. because of this, i started to search for a workaround when this scenario happens.

 

i placed an onload function in my img tag. in that function i used this.width and this.height to get the size. but then, they returned zeroes. i dont know what to do now.

 

can anybody please help me? how do i get the image width and height using either php or javascript?

 

thanks a lot.

[ToonMariner]

if getimagesize is returning null values then the path is incorrect or there is something wrong with the image file itself...

[pranav_kavi]

Read this snippet frm http://www.php.net

 

Note:  Some formats may contain no image or may contain multiple images. In these cases, getimagesize() might not be able to properly determine the image size. getimagesize() will return zero for width and height in these cases.

[MadTechie]

try this

$image = "image.jpg";
if(file_exists($image))
{
list($width , $height) = getimagesize($image);
echo "w:$width, h:$height";
}else{
echo "file not found";
}

 

 

[whirlpool6]

there is really nothing wrong with the url... images still display in the end. this means that the image exists... but i have no idea why this returns blanks. im guessing that this may be because of slow download speed. i dont know...

[MadTechie]

there is really nothing wrong with the url... images still display in the end. this means that the image exists...

 

erm ok

<?php
$image = "http://#############.net/../#######/CSS/logo.png";
echo "<img src='$image' />"; //displays
list($width , $height) = getimagesize($image); //fails
echo "w:$width, h:$height";

?>

 

EDIT: removing the "/.." fixed it as the path was invalid to PHP but corrected by the browser

[whirlpool6]

madtechie thanks for the reply.

 

so you mean that the url might be incorrect because of things like /..? what other things are not allowed? i mean, our url doesn't even have things like this. are there other things not allowed? and how does the browser correct such things?

[whirlpool6]

here is a sample of the image url used...

 

HTTP://AAAAA/BBB/DOCUMENTUM//430/SS010/HL/2007/03/28/HL000000681360-1//NEW/ss010-2007032879383.jpg

 

i dont know if anything is wrong here...

[whirlpool6]

hello guys,

 

can anybody solve this?

 

thanks a lot.