How to download a picture thru http://?

Hi guys, Is there any special way to get some pics from the web? Cos' what I wrote just does not work. Thanks if (file_exists($kepnev)){ $kepnev="http://www.stg/pics/somethinggy.jpg"]; $fdr = fopen($kepnev,"r"); $fdw = fopen($kepnevshort,"w"); while (!feof($fdr)) { fputs ($fdw,fgets($fdr, 4096)); } fclose($fdr); fclose($fdw); } }