From: csaba at alum dot mit dot edu Operating system: Win2K PHP version: 4.3.4 PHP Bug Type: Output Control Bug description: Multiple clients messing up file reading
Description: ------------ I'm way sorry for posting this here since the culprit is unclear, but you guys have the best response. I've written a (non polling) script to simulate sockets on localhost. Web page A at http://localhost/test/In.php is a page that the user enters some text with and it gets written into a file. Meanwhile, web page B at http://localhost/test/Out.php is looking at this file and when it changes, it will update web page B with the new text. This is working fine. Now introduce web page C at the same http://localhost/test/Out.php In this case, the second page of B and C to be user refreshed/invoked will notice the change from page A, and after that it stops refreshing, too. Something is clearly wrong, but is it PHP 4.3, Apache 2.0.43, IE 5.5, or (gasp) my code? I have also coded file_get_contents manually with the same results. Reproduce code: --------------- In the test directory have 3 files: In.php: <?php $newWord = @$_POST["newWord"]; ?> <html> <head><title>Input page</title></head> <body> <form method=post> <table><tr><td>Enter a word: </td> <td><input name=newWord value='<?php print($newWord); ?>'></td></tr> <tr><td> </td><td><input type=submit></td></tr> </table> <?php if($_SERVER["REQUEST_METHOD"]=="POST") { $fh = fopen("myWord.txt", "w"); fwrite ($fh, $newWord); print("submitted: $newWord"); } ?> </form></body></html> Out.php: <html> <head><title>Output page</title> <script type='text/javascript'> function openSocket() { document.scripts[0].src = "socket.php"; } </script> </head> <body onLoad='openSocket()'> Your output word is: <div id=myWord><?php print(file_get_contents("myWord.txt")); ?></div> </body> </html> Socket.php <?php header("Content-Type: text/javascript; charset=ISO-8859-1"); $txt = file_get_contents("myWord.txt"); for ($ctr=1;$ctr<15;++$ctr) { $newTxt = file_get_contents ("myWord.txt"); if ($newTxt!=$txt) { print ("top.document.getElementById('myWord').innerText = '$newTxt';\r\n"); print ("document.scripts[0].src = 'socket.php';\r\n"); die(); } sleep(1); } print ("document.scripts[0].src = 'socket.php';\r\n"); Expected result: ---------------- What I expect to have happen is that when multiple browser windows are aimed at http://localhost/test/Out.php that they will all update right away when In.php changes the contents of myWord.txt Actual result: -------------- Only the latter of the two Out.php windows is updated a single time. -- Edit bug report at http://bugs.php.net/?id=27494&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27494&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27494&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=27494&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=27494&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=27494&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=27494&r=needscript Try newer version: http://bugs.php.net/fix.php?id=27494&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=27494&r=support Expected behavior: http://bugs.php.net/fix.php?id=27494&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=27494&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=27494&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=27494&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27494&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=27494&r=dst IIS Stability: http://bugs.php.net/fix.php?id=27494&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=27494&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=27494&r=float
