Comments on: PHP Exclusive Single Process Mutex http://elliottback.com/wp/php-exclusive-single-process-mutex/ Internet & Technology Sat, 21 Nov 2009 20:35:15 -0400 http://wordpress.org/?v=2.8.4 hourly 1 By: Robert http://elliottback.com/wp/php-exclusive-single-process-mutex/#comment-2188902 Robert Sat, 12 Sep 2009 14:23:38 +0000 http://elliottback.com/wp/?p=3119#comment-2188902 I use this for some time now <pre class="brush:php"> function mutex($mtx, $i) { switch($i){ case 0: @unlink($mtx); return; case 1: while(!($fp = @fopen($mtx,'x'))){ } fclose($fp); return; case 2: $fp=@fopen($mtx,'x'); if($fp){ fclose($fp); return 1; } return 0; } } </pre> I use this for some time now

function mutex($mtx, $i)
{
	switch($i){
	case 0: @unlink($mtx); return;
	case 1: while(!($fp = @fopen($mtx,'x'))){ } fclose($fp); return;
	case 2: $fp=@fopen($mtx,'x'); if($fp){ fclose($fp); return 1; } return 0;
	}
}
]]> By: Elliott Back http://elliottback.com/wp/php-exclusive-single-process-mutex/#comment-2184181 Elliott Back Sun, 07 Jun 2009 03:55:08 +0000 http://elliottback.com/wp/?p=3119#comment-2184181 Yeah, my web runs via apache. But the lockfile is owned as apache. Interestingly, I just tried it again and it worked on the web (because another was running via cron). Hmm... Yeah, my web runs via apache. But the lockfile is owned as apache. Interestingly, I just tried it again and it worked on the web (because another was running via cron). Hmm…

]]> By: Montoya http://elliottback.com/wp/php-exclusive-single-process-mutex/#comment-2184080 Montoya Fri, 05 Jun 2009 02:35:29 +0000 http://elliottback.com/wp/?p=3119#comment-2184080 Could it be a permissions issue? Usually when running a php file on the command line, you are running as root, but via the web, you might be running as Apache or as nobody. Could it be a permissions issue? Usually when running a php file on the command line, you are running as root, but via the web, you might be running as Apache or as nobody.

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