Inserting Images Dynamically

rahulroy

Hi,

I want to pick images from a folder on the web and how them on my page. The name of the images that I want to pick from that folder are named as: up5.gif, up4.gif, up3.gif, up2.gif, up1.gif and there are upto 50 images.

Looping could be used to check for the files (numerically), and stop the loop when you get an error (presumably when a file doesn't exist). Then start inserting images to local page with last image being the first on the page.

Rahul.

khaldryck

that's not too hard to do

just do a while loop
in your loop check to see if the pic exist,
yes : show it (<img src="pic<? echo $i++; ?>.gif"> for exemple)
no exit loop.
to know if the pic exists use fopen.

rahulroy

Thanks for your reply, I wish it to be as simple enough as you said, for that to work 2 things are required:

1) A function to break the loop as soon as it encounters the "404 error"

2) As far as I know fopen does not work via the web "http", its good enough to read folders on local machine

Thanks.

khaldryck

the 1 is simple : exit(), or break;

for the 2) i'm not sure, but i don't see why you couldn't try to open a file in read-only even if it's not on your server.

superfisch

GetImageSize does amazing things for verifying images located on the web..

steadyguy

The cURL Library will allow you to check for 404 Errors, can use HTTP, and more ...

Weedpacket

Originally posted by rahulroy
2) As far as I know fopen does not work via the web "http", its good enough to read folders on local machine

It does in PHP's standard configuration. You can't write, of course, and you only get what you'd get if you request the URL with any other client, but that's all you need for an image.

You can @fopen() the file, (the @ suppresses the error message), and then look to see if the file pointer you assigned the result to is false or not. If it's false, the request failed.