Server push using PHP

I am working on a project that needs to use the "server push" mode. What I need to do is send a series of jpg's to a client such that each new jpg replaces the previous one. What the client sees is a low rep rate "movie". The code I have at this point, nearly works. I can send a series of images, however, the php script occasionally stops before it sends the entire list of images. PHP's behavior is strange, because it's pretty consistant about which images it stops on. If I remove the "offending image" from the list, the script will continue with later images, until it hits another "offending image". About 1 image in 125 is an offending image, and stops the script. One other clue, is that the "offending image" is the one shown on the browser when the transfer stops. In other words, "offending images" can be displayed, but they prevent the script from proceeding to the next image. At first I thought the problem was that PHP was timing out. However adding set_time_limit() has made no difference, and besides the script stops at a certain image, not after a certain number of images, or after a certain amount of time. Then I suspected my browser was at fault, but I have also generated a perl cgi script to do the server push function, and it runs thru the "offending images" just fine. Is it possible that the php function readfile() has trouble with transfering certain charactor codes? Any assistance would be greatly appreciated. Details are below. Best Regards, Robert -------------------------------- PHP script I am using to send the images: <?php Header("Content-type: multipart/x-mixed-replace; boundry=--myboundryishere"); # parms passed in the URL: # $dir the directory to read the image files from # $min the index number of the first file to display # $max the index file of the last file to display # $rate the number of milliseconds between images $l = ls $dir; $files = explode("\n", chop($l)); $micro = 1000 * $rate; set_time_limit( 3600 ); echo "--myboundryishere\n"; while( list( $no, $line ) = each( $files )) { if( ($no >= min) && ($no <= $max) ) { echo "Content-type: image/jpeg\n\n"; readfile("$dir/$line"); echo "\n\n--myboundryishere\n"; usleep($micro); } } ?> ---------------------------- Here is the line used to invoke this script: echo "<img src=\"scan_image.php?dir=$dir&min=0&max=20000&rate=250\">"; ----------------------------- Here is the partial output from phpinfo() on this server: PHP Version 4.0.2 System Linux xxx.xxx.xxx 2.2.14-5.0 #1 Tue Mar 7 21:07:39 EST 2000 i686 unknown Build Date Sep 23 2000 Configure Command './configure''--with-mysql' '--with-apxs' '--enable-magic-quotes' '--with-ndbm' Server API Apache Virtual Directory Support disabled Configuration File (php.ini) /usr/local/lib Path ZEND_DEBUG disabled Thread Safety disabled ------------------- The OS was built from RedHat 6.2.