【发布时间】：2018-09-01 09:54:23
【问题描述】：
我一直在阅读有关 PHP 多线程的文章，但我很难将它集成到我的命令行 php 脚本中。
我读过multithreading 和multithread foreach。
但我真的不确定。任何想法如何在这里应用多线程？我在这里需要多线程的原因是 Telnet 需要永远（参见 shell 脚本）。但我不能同时写入我的数据库（$stmt2）。我正在使用 $stmt->fetch 遍历我的设备列表。
也许我应该执行run task specifically 之类的操作，只在任务中调用 telnet/shell 脚本，例如：
$task = new class extends Thread {
private $response;
public function run()
{
$content = file_get_contents("http://google.com");
preg_match("~<title>(.+)</title>~", $content, $matches);
$this->response = $matches[1];
}
};
$task->start() && $task->join();
var_dump($task->response); // string(6) "Google"
但是，当我尝试将其添加到下面的代码中时出现错误：
PHP Parse error: syntax error, unexpected T_CLASS in /opt/IBM/custom/NAC_Dslam/calix_swVerThreaded.php on line 100
这是行：
$task = 新类 ...
我的脚本如下所示：
$stmt =$mysqli->prepare("SELECT ip, model FROM TableD WHERE vendor = 'Calix' AND model in ('C7','E7') AND sw_ver IS NULL LIMIT 6000"); //AND ping_reply IS NULL AND software_version IS NULL
$stmt->bind_result($ip, $model); //list of ip's
if(!$stmt->execute())
{
//err
}
$stmt2 = $mysqli2->prepare("UPDATE TableD SET sw_ver = ?
WHERE vendor = 'Calix'
AND ip = ? ");
$stmt2->bind_param("ss", $software, $ip);
while($stmt->fetch()) {
//initializing var's
if(pingAddress($ip)=="alive") { //Ones that don't ping are dead to us.
///////this is the part that takes forever and should be multi-threaded/////
//Call shell script to telnet to calix dslam and get version for that ip
if($model == "C7"){
$task = new class extends Thread {
private $itsOutput;
public function run()
{
exec ("./calix_C7_swVer.sh $ip", $itsOutput);//takes forever/telnet
//in shell script. Can't
//be fixed. Each time I
//call this script it's a
//different ip
}
};
$task->start() && $task->join();
var_dump($task->itsOutput); //should be returned output above //takes forever to telnet
//$output = $task->itsOutput;
$output2=array_reverse($output,true);
if (!(preg_grep("/DENY/", $output2))){
$found = preg_grep("/COMPLD/", $output2);
$ind = key($found);
$version = explode(",", $output[$ind+1]);
if(strlen($version[3])>=1) { //if sw ver came back in an acceptable size
$software = $version[3];
$software = trim($software,'"'); //trim double quote (usually is there)
print "sw ver after trim: " . $software . "\n";
if(!$stmt2->execute()) { //write sw version to netcool db
$tempErr = "Failed to insert into dslam_elements_nac: " . $stmt2->error;
printf($tempErr . "\n"); //show mysql execute error if exists
$err->logThis($tempErr);
}
if(!$stmtX->execute()) { //commit it
$tempErr = "Failed to commit dslam_elements_nac: " . $stmtX->error;
printf($tempErr . "\n"); //show mysql execute error if exists
$err->logThis($tempErr);
}
} //we got a version back
else { //version not retrieved
//error processing
} //didn't get sw ver
} //not deny
} //c7
else if($model == "E7") {
exec ("./calix_E7_swVer.sh $ip", $output);
$output2=array_reverse($output,true);
if (!(preg_grep("/DENY/", $output2))){
$found = preg_grep("/yes/", $output2);
$ind = key($found);
$version = explode(" ", $output[$ind]);
if(strlen($version[5])>=1) { //if sw ver came back in an acceptable size
$software = $version[5];
print "sw ver after trim: " . $software . "\n";
if(!$stmt2->execute()) { //write sw version to netcool db
$tempErr = "Failed to insert into dslam_elements_nac: " . $stmt2->error;
printf($tempErr . "\n"); //show mysql execute error if exists
$err->logThis($tempErr);
}
if(!$stmtX->execute()) { //commit it
//err processing
}
} //we got a version back
else { //version not retrieved
//handle it
} //didn't get sw ver
} //not deny
}
} //while
更新 我正在尝试这个（pcntl_fork），但它似乎不是我所需要的，因为当我睡眠（30）时，我认为这与我的 shell 脚本调用类似，其他进程不会继续并执行下一个一个。
<?php
declare(ticks = 1);
$max=10;
$child=0;
$res = array("aabc", "bcd", "cde", "eft", "ggg", "hhh", "iii", "jjj", "kkk", "lll", "mmm", "nnn", "ooo", "ppp", "qqq", "aabc", "bcd", "cde", "eft", "ggg", "hhh", "iii", "jjj", "kkk", "lll", "mmm", "nnn", "ooo", "ppp", "qqq");
function sig_handler($signo) {
global $child;
switch ($signo) {
case SIGCHLD:
//echo "SIGCHLD receivedn";
// clean up zombies
$pid = pcntl_waitpid(-1, $status, WNOHANG);
$child -= 1;
//exit;
}
}
pcntl_signal(SIGCHLD, "sig_handler");
//$website_scraper = new scraper();
foreach($res as $r){
while ($child >= $max) {
sleep(5); //echo " - sleep $child n";
//pcntl_waitpid(0,$status);
}
$child++;
$pid=pcntl_fork();
if ($pid==-1) {
die("Could not fork:n");
}
elseif ($pid) {
// we're in the parent fork, dont do anything
}
else {
//example of what a child process could do:
print "child process stuff \n";
sleep(30);
//$website_scraper -> scraper("http://foo.com");
exit;
}
while(pcntl_waitpid(0, $status) != -1) { //////???
$status = pcntl_wexitstatus($status);
echo "child $status completed \n";
}
print "did stuff \n";
}
?>
【问题讨论】：
-
无论如何，新部分都被注释掉了。我的 php 版本是 5.3.3。新的来自我尝试使用的互联网示例，它似乎不允许我同时运行多个 shell 脚本。
-
@bishop - 我看到你的评论是关于我第一次尝试使用新线程。我目前正在尝试的是 pcntl_fork。
-
明确一点，
pcntl_fork创建了一个新的进程，因此不是多线程。 -
如果 pcntl_fork 允许我同时运行我的 shell 脚本，并稍后一起处理结果，那没关系。这是有人推荐的，但我没有看到它同时运行，就像我上面所说的那样。有什么建议@bishop？
标签： php sql multithreading telnet