Question

我有一个PHP问题让我有点疯狂（可能是因为我不是专家 - 我确信有解决方案！）。

我需要做的是：

1）运行PHP脚本（readValues.php），从MySQL数据库中读取某些值

2）用这些值做一些事情来产生结果

3）根据结果，触发另一个PHP脚本（writeValues.php），该脚本每秒执行一次对MySQL数据库的写入。这个脚本可能运行很多分钟，所以我希望它在后台运行

4）一旦知道结果，就从readValues.php向用户发送响应。这就是我的问题所在 - readValues.php在向Web客户端发送响应之前等待writeValues.php完成

我尝试了很多来自SO的建议，包括：

包括
标题
退出/返回
使用ob_flush
exec with nohup

然而，无论我尝试什么，readValues.php 总是在向用户发送响应之前等待writeValues.php完成。

以下是readValues.php的内容：

<?php
include 'aorigin.php';
include 'conn.php';

$data = array("userID" => (int)htmlspecialchars($_POST["userID"]),
              "userMaxTroops" => null,
              "userCurrentTroops" => null,
              "troopLosses" => 0,
              );

function randBetween ($min, $max) {
  // generates a random number between (and including) the minimum and maximum parameters
  $num = 0;
  $num = (mt_rand() / mt_getrandmax()) * ($max - $min) + $min;
  return $num;
}

// get the user's current troops
$sql = "SELECT current_troops FROM Users WHERE user_ID ='" . $data["userID"] . "';";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$data["userCurrentTroops"] = (int)$row["current_troops"];
$result -> close();

// determine troops lost
$data["troopLosses"] = round (randBetween (0, 5));

// send back the full data array - should only be used for testing and not in production!
echo json_encode ($data);

mysqli_close($conn);

// fire increment database script
if ($data["userCurrentTroops"] < $data["userMaxTroops"]) {
  exec("nohup php incrementTroops.php " . $data['userID'] . " " . 5);
  // return(exec("php incrementTroops.php " . $data['userID'] . " " . 5));
  // exec("php incrementTroops.php " . $data['userID'] . " " . 5, $output);
  // file_put_contents('file.txt', $output); // testing output of incrementTroops.php
  // exit();
}

// include 'incrementTroops.php';

?>

以下是writeValues.php的内容：

<?php
include 'aorigin.php';
include 'conn.php';

$increment = FALSE;
$troopsPerSquare = $argv[2];

$data = array("userID" => (int)$argv[1],
              "userSquares" => null,
              "userMaxTroops" => null,
              "userCurrentTroops" => null,
              );

do { //loop will run until we do not need to increment
    $increment = TRUE;
    // get the user's squares count
    $sql = "SELECT COUNT(User_ID) AS numberOfSquares FROM Map WHERE User_ID = '" . $data["userID"] . "';";
    $result = mysqli_query($conn, $sql);
    $row = mysqli_fetch_assoc($result);
    $data["userSquares"] = (int)$row["numberOfSquares"];
    $result -> close();

    // get the user's current troops
    $sql = "SELECT current_troops FROM Users WHERE user_ID ='" . $data["userID"] . "';";
    $result = mysqli_query($conn, $sql);
    $row = mysqli_fetch_assoc($result);
    $data["userCurrentTroops"] = (int)$row["current_troops"];
    $result -> close();

    // set the user's max troops
    $data["userMaxTroops"] = $data["userSquares"] * $troopsPerSquare;

    sleep(1); //wait for 1 sec before executing
    $sql = "UPDATE Users SET current_troops = current_troops + 1 WHERE user_ID ='" . $data["userID"] . "';";
    $result = mysqli_query($conn, $sql);
    $data["userCurrentTroops"] += 1;

    // set $increment as FALSE if we want get out of this loop
    if($data["userCurrentTroops"] >= $data["userMaxTroops"]){
      $increment = FALSE;
    }
} while ($increment == TRUE);

mysqli_close($conn);
?>

请注意以上是非常原始的测试代码，所以我还没有编写函数或添加错误检查等，直到我知道我可以解决这个基本问题。

我真的很感激任何帮助！

从PHP脚本发送输出，触发另一个PHP脚本，然后退出

0 个答案: