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.

[emehrkay]

the images need to be in the dom for js to access them

 

if they are, use offsetHeight and offseWidth

 

example

 

var x = document.getElementsByTagName('img');

var c = x.length;

for(i = 0; i < c; i++){

    alert(x.src+' '+x.offsetHeight);

}

[whirlpool6]

hello guys,

 

i am really not interested in getting the width and height of the image per se. but im interested in getting their height and width on or after they load. i have to do this to display the image correctly. if the image width is bigger than that of the height, the image is to be displayed with a width of 100. else, its height will be 90. so this has to be done before the image is displayed. i have placed a function to get the width and height on the onload of the image but unfortunately, they return zero. why is this so guys?

 

thanks a lot.