php popen兑现多任务

php popen实现多任务

<?php $update_num = 1000;$limit = 100;$p_num = 0;$line_cmd = 'ps -ef | grep doit.php | grep -v grep | wc -l';$exec_cmd = '/usr/local/php/bin/php doit.php %s & > /dev/null 2>&1';$t1 = microtime(1);for($i = 0 ; $i 

<?phpsleep (2);$fp = fopen('doit.txt','a');fwrite($fp,$argv[1]."\n");fclose($fp);exit(0);?>