PHP使用PCNTL系列的函數也能做到多進程處理一個事務。比如我需要從數據庫中獲取80w條的數據,再做一系列後續的處理,這個時候,用單進程?你可以等到明年今天了。。。所以應該使用pcntl函數了。
下面我們來看個實例
代碼
<?php $arChildId = array(); for($i = 0; $i < 10; $i++) { $iPid = pcntl_fork(); if($iPid == -1) { die('can\'t be forked.'); } if($iPid) { # 主進程邏輯 $arChildId[] = $iPid; } else { # 子進程邏輯 $iPid = posix_getpid(); # 獲取子進程的ID $iSeconds = rand(5, 30); echo '* Process '. $iPid. ' was created, and Executed, and Sleep '. $iSeconds. PHP_EOL; excuteProcess($iPid, $iSeconds); exit(); } } while(count($arChildId) > 0) { foreach($arChildId as $iKey=> $iPid) { $res = pcntl_waitpid($iPid, $status, WNOHANG); if($res == -1 || $res > 0) { unset($arChildId[$iKey]); echo '* Sub process: '. $iPid. ' exited with '. $status. PHP_EOL; } } } # 子進程執行的邏輯 function excuteProcess($iPid, $iSeconds) { file_put_contents('./log/'.$iPid.'.log', $iPid.PHP_EOL, FILE_APPEND); sleep($iSeconds); } ?>
運行結果
* Process 16163 was created, and Executed, and Sleep 11 * Process 16164 was created, and Executed, and Sleep 21 * Process 16165 was created, and Executed, and Sleep 24 * Process 16166 was created, and Executed, and Sleep 27 * Process 16167 was created, and Executed, and Sleep 8 * Process 16168 was created, and Executed, and Sleep 14 * Process 16169 was created, and Executed, and Sleep 14 * Process 16170 was created, and Executed, and Sleep 26 * Process 16171 was created, and Executed, and Sleep 20 * Process 16172 was created, and Executed, and Sleep 21 * Sub process: 16167 exited with 0 * Sub process: 16163 exited with 0 * Sub process: 16169 exited with 0 * Sub process: 16168 exited with 0 * Sub process: 16171 exited with 0 * Sub process: 16164 exited with 0 * Sub process: 16172 exited with 0 * Sub process: 16165 exited with 0 * Sub process: 16170 exited with 0 * Sub process: 16166 exited with 0