note 125106 added to features.commandline.io-streams

Under Linux CLI - STDIN, STDOUT and STDERR can be closed and reconnected to a different php stream such as a file, pipe or even a UDP socket_stream. (I use this technique to send the output/errors of my long running background scripts to a file so I can debug if something goes wrong.) For example: (The below creates/appends file "/tmp/php_stdout.txt") <?php // This only works under CLI in Linux // Note: Until we have closed it STDOUT will NOT be prefixed with a $ // Get the path to the current console for STDOUT so we can reconnect later! $strOldSTDOUT=(posix_ttyname(STDOUT)); echo("This will go to the current console\r\n"); // Close the STDOUT resource fclose(STDOUT); // Reopen $STDOUT as a file Note: All further $STDOUT usage will be prefixed with a $ $STDOUT=fopen("/tmp/php_stdout.txt","a"); / echo("This should append the file /tmp/php_stdout.txt\r\n"); // Close stdout again so we can reconnect the console. Note: We are still using fclose($STDOUT); // Use the path to the console we got earlier $STDOUT=fopen($strOldSTDOUT,"r+"); echo("And we are back on the console\r\n"); ?> ---- Server IP: 45.112.84.4 Probable Submitter: 101.0.109.162 (proxied: 203.192.75.125) ---- Manual Page -- http://php.net/manual/en/features.commandline.io-streams.php Edit -- https://master.php.net/note/edit/125106 Del: integrated -- https://master.php.net/note/delete/125106/integrated Del: useless -- https://master.php.net/note/delete/125106/useless Del: bad code -- https://master.php.net/note/delete/125106/bad+code Del: spam -- https://master.php.net/note/delete/125106/spam Del: non-english -- https://master.php.net/note/delete/125106/non-english Del: in docs -- https://master.php.net/note/delete/125106/in+docs Del: other reasons-- https://master.php.net/note/delete/125106 Reject -- https://master.php.net/note/reject/125106 Search -- https://master.php.net/manage/user-notes.php