PHP CLI: A Cinderella Story
•Descargar como PPT, PDF•
9 recomendaciones•5,476 vistas
How to utilize the PHP CLI SAPI in a scalable way. Initially presented at the 2008 DC PHP Conference
![Introduction ,[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recomendados
Más contenido relacionado
La actualidad más candente
La actualidad más candente (20)
Destacado
Destacado (18)
Similar a PHP CLI: A Cinderella Story
Similar a PHP CLI: A Cinderella Story (20)
Último
Último (20)
PHP CLI: A Cinderella Story
- 1. PHP CLI A Cinderella Story
- 3. If you use Windows... ...please leave now.
- 22. Forking <?php $pid = pcntl_fork (); if ( $pid == - 1 ) { die( "Could not fork!" ); } else if ( $pid ) { // parent } else { // child } ?>
- 23. Forking Multiple Children <?php define ( 'MAX_CHILDREN' , 5 ); $children = array(); $jobs = get_jobs (); while ( count ( $jobs )) { if ( count ( $children ) < MAX_CHILDREN ) { $data = array_shift ( $jobs ); $pid = pcntl_fork (); if ( $pid == - 1 ) { die( "Could not fork!" ); } else if ( $pid ) { $children [ $pid ] = true ; } else { process_data ( $data ); exit( 0 ); } } while ( $wait_pid = pcntl_waitpid (- 1 , $status , WNOHANG )) { if ( $wait_pid == - 1 ) { die( "problem in pcntl_waitpid!" ); } unset( $children [ $wait_pid ]); } } ?>
- 25. Shared Resources <?php // ... // bad time to open a database connection $db = new PDO ( 'mysql:host=localhost' , 'dbuser' , 'pass' ); while ( count ( $data )) { if ( count ( $children ) < MAX_CHILDREN ) { $data = array_shift ( $jobs ); $pid = pcntl_fork (); if ( $pid == - 1 ) { die( "Could not fork!" ); } else if ( $pid ) { $children [ $pid ] = true ; } else { process_data ( $data , $db ); exit( 0 ); // When the child exits the database connection // will be disposed of. } } // ... } ?>
- 26. Shared Resources <?php // ... while ( count ( $data )) { if ( count ( $children ) < MAX_CHILDREN ) { $data = array_shift ( $jobs ); $pid = pcntl_fork (); if ( $pid == - 1 ) { die( "Could not fork!" ); } else if ( $pid ) { $children [ $pid ] = true ; } else { // Much safer $db = new PDO ( 'mysql:host=localhost' , 'dbuser' , 'pass' ); process_data ( $data , $db ); exit( 0 ); // When the child exits the database connection // will be disposed of. } } // ... } ?>
- 28. Memory Usage <?php define ( 'MAX_CHILDREN' , 5 ); $children = array(); $jobs = get_jobs (); while ( count ( $jobs )) { if ( count ( $children ) < MAX_CHILDREN ) { $data = array_shift ( $jobs ); $pid = pcntl_fork (); if ( $pid == - 1 ) { die( "Could not fork!" ); } else if ( $pid ) { $children [ $pid ] = true ; } else { unset ( $jobs ); // <--- will save memory in your child where you do not need $jobs around anymore process_data ( $data ); exit( 0 ); } } while ( $wait_pid = pcntl_waitpid (- 1 , $status , WNOHANG )) { if ( $wait_pid == - 1 ) { die( "problem in pcntl_waitpid!" ); } unset( $children [ $wait_pid ]); } } ?>
- 32. How to Talk to Your Kids <?php $socks = stream_socket_pair ( STREAM_PF_UNIX , STREAM_SOCK_STREAM , STREAM_IPPROTO_IP ); $pid = pcntl_fork (); if ( $pid == - 1 ) { die( 'could not fork!' ); } else if ( $pid ) { // parent fclose ( $socks [ 1 ]); fwrite ( $socks [ 0 ], "Hi kid" ); echo fgets ( $socks [ 0 ]); fclose ( $socks [ 0 ]); } else { // child fclose ( $socks [ 0 ]); fwrite ( $socks [ 1 ], "Hi parent" ); echo fgets ( $socks [ 1 ]); fclose ( $socks [ 1 ]); } /* Output: Hi kid Hi parent */ ?>