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<?php error_reporting(E_ALL); $handle = popen('ls -lart', 'r'); echo "'$handle'; " . gettype($handle) . "\n"; $read = fread($handle, 2096); echo $read; pclose($handle); ?>
实践时发现：
在做shell执行：ls /data/htdocs/pro/logs/*
出现多个文件时，最好是对返回串进行：rtrim($returnStr,"\n");
再:explode($returnStr,"\n"); 这样就不会有空数组了。

Example:

<?php
error_reporting(E_ALL);
while(1)
{
        $handle=popen("more video_user_20080626_190223.txt|grep @docid:|wc","r");
        $read = fread($handle, 2096);
        echo $read;
        pclose($handle);
        sleep(1);
}

?>





二、调用PHP或其它语言有while（1）的特别注意点：
特别是调用串口的一直监控代码，尽可能要用到，读取返回值，否则就会启动不起来那个while的程序：
do { $excuteResult = fread($handle, 1024); if (strlen($excuteResult) == 0) {     break; } $excuteResultAll .= $excuteResult; } while (true); /codes] 层层都要有do while，否则一直循环的程序会死掉，查了好久，这样干就不会出错了： 这个C转成Root的也要有do while读取返回，/data/htdocs/t.jackxiang.com/cgi-bin/brainpowertempsrv killifcallingautoanswer killbyProName，而这个调用的PHP程序也是需要do while，一层层的调用也就对了。 startAutoAnserSer.php   brainpowertempsrv.c -》brainpowertempsrv.php  都要有返回就对了： brainpowertempsrv.php [codes=php] if ($argv[1] == "killifcallingautoanswer") { //杀掉自动接电话进程     $command = "sudo ps aux|grep ifCallingComesAnswer|grep -v \"grep\"|awk '{print \"kill -9 \"$2}'|sh";//杀掉进程     $handle  = popen($command, "r");     do {         $excuteResult = fread($handle, 1024);         if (strlen($excuteResult) == 0) {             break;         }         $excuteResultAll .= $excuteResult;     } while (true); } if ($argv[1] == "startifcallingautoanswer") { //启动自动接电话进程     echo $command = "sudo /usr/bin/php /data/htdocs/t.jackxiang.com/ifCallingComesAnswer.php &";//启动进程     echo "\n";     $handle  = popen($command, "r");     do {         $excuteResult = fread($handle, 1024);         if (strlen($excuteResult) == 0) {             break;         }         $excuteResultAll .= $excuteResult;     } while (true);     //echo $excuteResultAll; }

C:
                snprintf(command,sizeof(command),"sudo /usr/bin/php /data/htdocs/t.jackxiang.com/cgi-bin/brainpowertempsrv.php %s %s",opt,path);                 printf("command=%s",command);                 if( (pPipe = popen( command, "r" )) == NULL ){//执行脚本                                 printf("Excute Command Faild :%s",command);                                 exit( 1 );                 }                 while(!feof(pPipe))/* Read pipe until end of file. */                 {                                 if(fgets(psBuffer, sizeof(psBuffer), pPipe) != NULL)                                                 printf("%s",psBuffer);                 }                 /* Close pipe and print return value of pPipe. */                 //printf( "\nProcess returned: %d\n", pclose( pPipe ) );                 pclose(pPipe);
vi  startAutoAnserSer.php
<?php $excuteResult = ""; $excuteResultAll = ""; $command = "/data/htdocs/t.jackxiang.com/cgi-bin/brainpowertempsrv killifcallingautoanswer killbyProName"; $handle  = popen($command, "r"); do { $excuteResult = fread($handle, 1024); if (strlen($excuteResult) == 0) {     break; } $excuteResultAll .= $excuteResult; } while (true); $command = "/data/htdocs/t.jackxiang.com/cgi-bin/brainpowertempsrv startifcallingautoanswer startAutoAnserSer"; $handle  = popen($command, "r"); do { $excuteResult = fread($handle, 1024); if (strlen($excuteResult) == 0) {     break; } $excuteResultAll .= $excuteResult; } while (true);

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/1082/
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