PHP 4.0 Bug #10092 Updated: Socket fgets memory and CPU usage problem

ID: 10092 User Update by: jakub@icewarp.com Old-Status: Feedback Status: Open Bug Type: Sockets related Description: Socket fgets memory and CPU usage problem The code snippet: test.php: <!-- This is a PHP POP3 Socket Test that demonstrates a Windows PHP CGI bug which consumes the transfered data thru the socket and never releases them. Each round of the for cycle below gets slower and slower and never finishes the end. To test it edit the POP3 server variables below. Make sure there's only one 500K message in the POP3 mailbox. Then run the test. Currently the PHP gives up in the 11th cycle. On windows 9x the PHP stops running. On windows NT/2000 the PHP goes crazy, consumes 100% CPU and never finishes. Please, contact me: Jakub Klos jakub@icewarp.com --> <HTML> <HEAD> <TITLE>Test</TITLE> </HEAD> <BODY> PHP POP3 Socket Test<BR><BR> <? $server = "localhost"; $port = 110; $user = "user"; $pass = "pass"; $round = 20; // connect to the POP3 server and read the response $socket = fsockopen($server, $port); $line = fgets($socket, 1024); // USER and PASS commands fputs($socket, "USER $user\r\n"); $line = fgets($socket, 1024); fputs($socket, "PASS $pass\r\n"); $line = fgets($socket, 1024); $length = 0; for ($i = 1; $i < $round + 1; $i++) { // RETR command to receive the message fputs($socket, "RETR 1\r\n"); $line = fgets($socket, 1024); if ($line[0] == "-") break; while (($line = fgets($socket, 1024)) <> ".\r\n") { if (!($line)) break; $length += strlen($line); } echo "Round $i/$round, Transfered $length<BR>"; flush(); } fclose($socket); echo "Total bytes received: $length"; ?> </BODY> </HTML> Previous Comments: --------------------------------------------------------------------------- [2001-03-31 17:18:02] sniper@php.net Please add a self containing short script into this report which can be used to reproduce this problem. --Jani --------------------------------------------------------------------------- [2001-03-31 09:56:39] jakub@icewarp.com When using the fgets function for large data transmission the data transmitted are never freed from memory. When using fgets with files it works fine. The PHP CGI module starts to utilize the CPU to 100% and never ends, stops processing and doesn't exit the fgets function after few read cycles. This happens only on Windows PHP CGI. We tested Apache and that worked fine. Even the previous version of PHP did that. Large data I'm talking about is 8MB and above. --------------------------------------------------------------------------- Full Bug description available at: http://bugs.php.net/?id=10092