Question

我有两个带超时参数的exec（）函数。例如：

<?php
exec("timeout 5 /usr/local/bin/trun 'uptime;ps -elf|grep httpd|wc -l;free -m;mpstat'",$t_uptime);
exec("timeout 5 /usr/local/bin/wrun 'uptime;ps -elf|grep httpd|wc -l;free -m;mpstat'",$t_uptime);
?>

不工作。我想exec()在5秒后停止，下一个exec()函数开始执行。请更正此问题或提供一些替代方法来停止exec()功能

Answer 1

exec - 执行外部程序

string exec ( string $command [, array &$output [, int &$return_var ]] )

exec() executes the given command.

Answer 2

使用此功能 - 有关详细信息，请阅读http://in2.php.net/function.exec

 function PsExecute($command, $timeout = 5, $sleep = 2) {
        // First, execute the process, get the process ID
        $pid = PsExec($command);

        if( $pid === false )
            return false;

        $cur = 0;
        // Second, loop for $timeout seconds checking if process is running
        while( $cur < $timeout ) {
            sleep($sleep);
            $cur += $sleep;
            // If process is no longer running, return true;
            if( !PsExists($pid) )
                return true; // Process must have exited, success!
        }

        // If process is still running after timeout, kill the process and return false
        PsKill($pid);
        return false;
    }

exec（）在PHP中有超时参数？

2 个答案: