向PHP发送邮件：文件内容未写入/提交顺序错误

我正在使用AngularHTTP将数据从我的Ionic应用程序发布到PHP脚本。在该脚本中，一个json文件被读取和解码，因此传入的数据可以被追加，然后写回该文件

这基本上可以正常工作，但在某些情况下，

文件内容

不会写入新的编码数组和/或提交顺序混乱

类型脚本：

this.names.forEach(name => {
    this.http.post("http://myServer.test/saveNames.php", {name: name["name"], mode: name["mode"]}).subscribe(
        err => {
            errors.push(name["name"]);
        }
    );
});

(3) [{…}, {…}, {…}]
0: {name: "User 1", mode: "namesM"}
1: {name: "User 2", mode: "namesW"}
2: {name: "User 3", mode: "namesJobs"}
length: 3

$postData = file_get_contents("php://input");
    if (isset($postData)) {
    $request = json_decode($postData, true);

    var_dump("Data after decode:");
    var_dump($request);

    $inp = file_get_contents('names.json');

    if (($inp) == "") return; // Return so file does not get messed up

    $allNames = json_decode($inp, true);

    var_dump("File, no decode:");
    var_dump($inp);
    var_dump("File, decoded:");
    var_dump($allNames);

    $allNames[] = $request;

    var_dump("File content + new data:");
    var_dump($allNames);
    var_dump("All data pretty printed:");
    var_dump(json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));

    file_put_contents('names.json', json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT)); // mit UTF8s
}

[
    {
        "name": "User 1",
        "mode": "namesM"
    },
    null
]

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 1"
  ["mode"]=>
  string(6) "namesM"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 1"
    ["mode"]=>
    string(6) "namesM"
  }
}
string(24) "All data pretty printed:"
string(66) "[
    {
        "name": "User 1",
        "mode": "namesM"
    }
]"

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 3"
  ["mode"]=>
  string(9) "namesJobs"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 3"
    ["mode"]=>
    string(9) "namesJobs"
  }
}
string(24) "All data pretty printed:"
string(69) "[
    {
        "name": "User 3",
        "mode": "namesJobs"
    }
]"

键入脚本发布数据：

this.names.forEach(name => {
    this.http.post("http://myServer.test/saveNames.php", {name: name["name"], mode: name["mode"]}).subscribe(
        err => {
            errors.push(name["name"]);
        }
    );
});

(3) [{…}, {…}, {…}]
0: {name: "User 1", mode: "namesM"}
1: {name: "User 2", mode: "namesW"}
2: {name: "User 3", mode: "namesJobs"}
length: 3

$postData = file_get_contents("php://input");
    if (isset($postData)) {
    $request = json_decode($postData, true);

    var_dump("Data after decode:");
    var_dump($request);

    $inp = file_get_contents('names.json');

    if (($inp) == "") return; // Return so file does not get messed up

    $allNames = json_decode($inp, true);

    var_dump("File, no decode:");
    var_dump($inp);
    var_dump("File, decoded:");
    var_dump($allNames);

    $allNames[] = $request;

    var_dump("File content + new data:");
    var_dump($allNames);
    var_dump("All data pretty printed:");
    var_dump(json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));

    file_put_contents('names.json', json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT)); // mit UTF8s
}

[
    {
        "name": "User 1",
        "mode": "namesM"
    },
    null
]

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 1"
  ["mode"]=>
  string(6) "namesM"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 1"
    ["mode"]=>
    string(6) "namesM"
  }
}
string(24) "All data pretty printed:"
string(66) "[
    {
        "name": "User 1",
        "mode": "namesM"
    }
]"

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 3"
  ["mode"]=>
  string(9) "namesJobs"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 3"
    ["mode"]=>
    string(9) "namesJobs"
  }
}
string(24) "All data pretty printed:"
string(69) "[
    {
        "name": "User 3",
        "mode": "namesJobs"
    }
]"

PHP脚本：

this.names.forEach(name => {
    this.http.post("http://myServer.test/saveNames.php", {name: name["name"], mode: name["mode"]}).subscribe(
        err => {
            errors.push(name["name"]);
        }
    );
});

(3) [{…}, {…}, {…}]
0: {name: "User 1", mode: "namesM"}
1: {name: "User 2", mode: "namesW"}
2: {name: "User 3", mode: "namesJobs"}
length: 3

$postData = file_get_contents("php://input");
    if (isset($postData)) {
    $request = json_decode($postData, true);

    var_dump("Data after decode:");
    var_dump($request);

    $inp = file_get_contents('names.json');

    if (($inp) == "") return; // Return so file does not get messed up

    $allNames = json_decode($inp, true);

    var_dump("File, no decode:");
    var_dump($inp);
    var_dump("File, decoded:");
    var_dump($allNames);

    $allNames[] = $request;

    var_dump("File content + new data:");
    var_dump($allNames);
    var_dump("All data pretty printed:");
    var_dump(json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));

    file_put_contents('names.json', json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT)); // mit UTF8s
}

[
    {
        "name": "User 1",
        "mode": "namesM"
    },
    null
]

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 1"
  ["mode"]=>
  string(6) "namesM"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 1"
    ["mode"]=>
    string(6) "namesM"
  }
}
string(24) "All data pretty printed:"
string(66) "[
    {
        "name": "User 1",
        "mode": "namesM"
    }
]"

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 3"
  ["mode"]=>
  string(9) "namesJobs"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 3"
    ["mode"]=>
    string(9) "namesJobs"
  }
}
string(24) "All data pretty printed:"
string(69) "[
    {
        "name": "User 3",
        "mode": "namesJobs"
    }
]"

names.json在任何写入之前（初始状态）：

names.json发布完成后：

this.names.forEach(name => {
    this.http.post("http://myServer.test/saveNames.php", {name: name["name"], mode: name["mode"]}).subscribe(
        err => {
            errors.push(name["name"]);
        }
    );
});

(3) [{…}, {…}, {…}]
0: {name: "User 1", mode: "namesM"}
1: {name: "User 2", mode: "namesW"}
2: {name: "User 3", mode: "namesJobs"}
length: 3

$postData = file_get_contents("php://input");
    if (isset($postData)) {
    $request = json_decode($postData, true);

    var_dump("Data after decode:");
    var_dump($request);

    $inp = file_get_contents('names.json');

    if (($inp) == "") return; // Return so file does not get messed up

    $allNames = json_decode($inp, true);

    var_dump("File, no decode:");
    var_dump($inp);
    var_dump("File, decoded:");
    var_dump($allNames);

    $allNames[] = $request;

    var_dump("File content + new data:");
    var_dump($allNames);
    var_dump("All data pretty printed:");
    var_dump(json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));

    file_put_contents('names.json', json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT)); // mit UTF8s
}

[
    {
        "name": "User 1",
        "mode": "namesM"
    },
    null
]

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 1"
  ["mode"]=>
  string(6) "namesM"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 1"
    ["mode"]=>
    string(6) "namesM"
  }
}
string(24) "All data pretty printed:"
string(66) "[
    {
        "name": "User 1",
        "mode": "namesM"
    }
]"

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 3"
  ["mode"]=>
  string(9) "namesJobs"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 3"
    ["mode"]=>
    string(9) "namesJobs"
  }
}
string(24) "All data pretty printed:"
string(69) "[
    {
        "name": "User 3",
        "mode": "namesJobs"
    }
]"

该文件有777个权限，在此过程中未打开。如您所见，只写入了一个名称，插入了一个null，然后什么也没有发生

当我查看Chrome网络标签时，我注意到在用户1（其漂亮的json打印看起来不错）之后，订单就乱了。用户1之后是用户3，但是

file\u get\u contents（names.json）

返回了空数组，因此用户1实际上没有被写入。用户3也生成了正确的json，但在这之后，用户2出现了，并且

file\u get\u contents（'names.json'）

是空的（如空字符串），因此它停止在这里

然而，我不明白为什么在所有这些之后，文件中仍然有用户1，以及为什么其他两个不是一般编写的

以下是Chrome网络选项卡中的我的var_dumps（）：

用户1（第一）：

this.names.forEach(name => {
    this.http.post("http://myServer.test/saveNames.php", {name: name["name"], mode: name["mode"]}).subscribe(
        err => {
            errors.push(name["name"]);
        }
    );
});

(3) [{…}, {…}, {…}]
0: {name: "User 1", mode: "namesM"}
1: {name: "User 2", mode: "namesW"}
2: {name: "User 3", mode: "namesJobs"}
length: 3

$postData = file_get_contents("php://input");
    if (isset($postData)) {
    $request = json_decode($postData, true);

    var_dump("Data after decode:");
    var_dump($request);

    $inp = file_get_contents('names.json');

    if (($inp) == "") return; // Return so file does not get messed up

    $allNames = json_decode($inp, true);

    var_dump("File, no decode:");
    var_dump($inp);
    var_dump("File, decoded:");
    var_dump($allNames);

    $allNames[] = $request;

    var_dump("File content + new data:");
    var_dump($allNames);
    var_dump("All data pretty printed:");
    var_dump(json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));

    file_put_contents('names.json', json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT)); // mit UTF8s
}

[
    {
        "name": "User 1",
        "mode": "namesM"
    },
    null
]

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 1"
  ["mode"]=>
  string(6) "namesM"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 1"
    ["mode"]=>
    string(6) "namesM"
  }
}
string(24) "All data pretty printed:"
string(66) "[
    {
        "name": "User 1",
        "mode": "namesM"
    }
]"

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 3"
  ["mode"]=>
  string(9) "namesJobs"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 3"
    ["mode"]=>
    string(9) "namesJobs"
  }
}
string(24) "All data pretty printed:"
string(69) "[
    {
        "name": "User 3",
        "mode": "namesJobs"
    }
]"

用户3（秒！？）：

this.names.forEach(name => {
    this.http.post("http://myServer.test/saveNames.php", {name: name["name"], mode: name["mode"]}).subscribe(
        err => {
            errors.push(name["name"]);
        }
    );
});

(3) [{…}, {…}, {…}]
0: {name: "User 1", mode: "namesM"}
1: {name: "User 2", mode: "namesW"}
2: {name: "User 3", mode: "namesJobs"}
length: 3

$postData = file_get_contents("php://input");
    if (isset($postData)) {
    $request = json_decode($postData, true);

    var_dump("Data after decode:");
    var_dump($request);

    $inp = file_get_contents('names.json');

    if (($inp) == "") return; // Return so file does not get messed up

    $allNames = json_decode($inp, true);

    var_dump("File, no decode:");
    var_dump($inp);
    var_dump("File, decoded:");
    var_dump($allNames);

    $allNames[] = $request;

    var_dump("File content + new data:");
    var_dump($allNames);
    var_dump("All data pretty printed:");
    var_dump(json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));

    file_put_contents('names.json', json_encode($allNames, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT)); // mit UTF8s
}

[
    {
        "name": "User 1",
        "mode": "namesM"
    },
    null
]

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 1"
  ["mode"]=>
  string(6) "namesM"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 1"
    ["mode"]=>
    string(6) "namesM"
  }
}
string(24) "All data pretty printed:"
string(66) "[
    {
        "name": "User 1",
        "mode": "namesM"
    }
]"

string(18) "Data after decode:"
array(2) {
  ["name"]=>
  string(6) "User 3"
  ["mode"]=>
  string(9) "namesJobs"
}
string(16) "File, no decode:"
string(2) "[]"
string(14) "File, decoded:"
array(0) {
}
string(24) "File content + new data:"
array(1) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "User 3"
    ["mode"]=>
    string(9) "namesJobs"
  }
}
string(24) "All data pretty printed:"
string(69) "[
    {
        "name": "User 3",
        "mode": "namesJobs"
    }
]"

用户2（第三！？）

---

我真的很抱歉这么长的文字，但我只是在尝试了几个小时后找不到解决办法。我希望我记录的足够好，谢谢你的帮助

在我看来，这两个问题都可能发生：

运行PHP的Web服务器可能会并行运行每个POST请求（多线程），这会导致文件部分打开，或者在一个请求忙于编写文件的同时，另一个请求忙于读取文件

Web服务器的文件系统告诉PHP文件已写入，一切正常，但实际上，在数据实际写入磁盘之前，它仍然忙于在内部缓存数据。因此，当下一个读取文件的请求到来时，它还没有被完全写入

因此，您可以尝试的解决方案是：

尝试使用带有

LOCK\u EX

标志的file\u put\u contents和file\u get\u contents以独占方式读取和写入文件。看

为什么要从同一个客户端发送多个POST请求？你应该这样做，而不是：

因此，一次性发送整个名称数组，这样就可以避免遇到此问题

---

磁盘操作非常慢，因此您不应该指望它们跟上来自客户端的请求。您应该尽可能少地执行磁盘操作，并在执行操作时尽量多地批处理数据。

我没有一个可以测试这一点的环境，但我要冒险猜测一下，您的TypeScript正在为

名称中的每个项目向PHP脚本发送post请求，并且它收到的每个请求，它正在覆盖以前的数据。尝试将
FILE\u APPEND
添加到
FILE\u put\u contents
作为第三个参数，看看这是否解决了问题。不过我可能会走得很远，让我知道事情进展如何=）