使用 PHP 解析 YAML 文件不会将操作数组转储回正确的 YAML 格式

【问题标题】：Parsing YAML file with PHP does not dump manipulated array back into correct YAML format使用 PHP 解析 YAML 文件不会将操作数组转储回正确的 YAML 格式
【发布时间】：2017-09-13 08:29:45
【问题描述】：

我制作了一个程序，它使用yaml_parse_file() 将 YAML 文件加载到 PHP 数组中，然后我使用这个函数来操作数组：

function removeElementWithValue($array, $key, $value){
     foreach($array as $subKey => $subArray){
          if($subArray[$key] == $value){
               unset($array[$subKey]);
          }
     }
     return $array;
}

然后我尝试使用 yaml_emit() 将新数组转储回 YAML 文件

问题是：程序没有使用正确的 YAML 格式将数组转储到 YAML 文件中。唯一一次将数组转储为正确的 YAML 格式是我的函数只删除数组中的最后一个元素。如果我使用该函数从数组中删除任何其他元素，它将转储回 YAML 文件，如：

---
1:
  ID: 1
  startX: 258.000000
  endX: 276.000000
  startZ: 271.000000
  endZ: 290.000000
  price: 38000.000000
  owner: KeithDavisRatio
  level: world
  invitee: []
  expires: ~
...

什么时候应该像这样转储

- ID: 1
  startX: 258.000000
  endX: 276.000000
  startZ: 271.000000
  endZ: 290.000000
  price: 38000.000000
  owner: KeithDavisRatio
  level: world
  invitee: []
  expires: ~
...

问题：如何正确操作数组，以便yaml_emit() 将新数组转储到具有正确 YAML 格式的文件中？提前感谢您的帮助。

完整程序： 

#Loads Land.yml into PHP Array
$file = '/Users/keithdavis/MineCraft/pocketmine-mp/plugins/EconomyLand/Land.yml';
$array = yaml_parse_file($file);

echo "Loaded into PHP: \n";
print_r($array);

echo "Would you like to
\n1: Delete all land claims by owner?
\n2: Delete all land claims except owner?\n";
$answer = readline("\nType 1 or 2: ");

#Answer 1
if ($answer == 1){
  $ownerName = readline("What is the owner's name?:  ");

  #Searches land array for owner
  if(array_search($ownerName, array_column($array, 'owner')) !== false ){
      echo "...Found $ownerName \n";

      #Removes owner from array
      $array = removeElementWithValue($array, 'owner', $ownerName);
      echo "...Removed claims owned by $ownerName \n";

      #Sends data back to Land.yml
      $landAfterDump = yaml_emit($array);
      file_put_contents($file, $landAfterDump);
      echo "YAML Data dumped back: \n";
      echo $landAfterDump;

  }else{
      echo 'Did not find ' . $ownerName . "\n";
  }
#Answer 2
}elseif ($answer == 2){
  $ownerName = readline("What is the owner's name?:  ");

  #Searches land array for owner
  if(array_search($ownerName, array_column($array, 'owner')) !== false ){
      echo "...Found claims by $ownerName \n";

      #Removes from array except owner
      $array = removeElementWithValueExcept($array, 'owner', $ownerName);
      echo "...Removed claims not owned by $ownerName \n";


      #Sends data back to Land.yml
      $landAfterDump = yaml_emit($array);
      file_put_contents($file, $landAfterDump);
      echo "YAML Data dumped back: \n";
      echo $landAfterDump;
  }
  else {
        echo 'Did not find ' . $ownerName . "\n";
  }
}else {
  echo "Input not recognized. Please run program again.\n";
}


#Remove from array
function removeElementWithValue($array, $key, $value){
     foreach($array as $subKey => $subArray){
          if($subArray[$key] == $value){
               unset($array[$subKey]);
          }
     }
     return $array;
}

#Remove from array except
function removeElementWithValueExcept($array, $key, $value){
     foreach($array as $subKey => $subArray){
          if($subArray[$key] !== $value){
               unset($array[$subKey]);
          }
     }
     return $array;
} <?php

#Loads Land.yml into PHP Array
$file = '/Users/keithdavis/MineCraft/pocketmine-mp/plugins/EconomyLand/Land.yml';
$array = yaml_parse_file($file);

echo "Loaded into PHP: \n";
print_r($array);

echo "Would you like to
\n1: Delete all land claims by owner?
\n2: Delete all land claims except owner?\n";
$answer = readline("\nType 1 or 2: ");

#Answer 1
if ($answer == 1){
  $ownerName = readline("What is the owner's name?:  ");

  #Searches land array for owner
  if(array_search($ownerName, array_column($array, 'owner')) !== false ){
      echo "...Found $ownerName \n";

      #Removes owner from array
      $array = removeElementWithValue($array, 'owner', $ownerName);
      echo "...Removed claims owned by $ownerName \n";

      #Sends data back to Land.yml
      $landAfterDump = yaml_emit($array);
      file_put_contents($file, $landAfterDump);
      echo "YAML Data dumped back: \n";
      echo $landAfterDump;

  }else{
      echo 'Did not find ' . $ownerName . "\n";
  }
#Answer 2
}elseif ($answer == 2){
  $ownerName = readline("What is the owner's name?:  ");

  #Searches land array for owner
  if(array_search($ownerName, array_column($array, 'owner')) !== false ){
      echo "...Found claims by $ownerName \n";

      #Removes from array except owner
      $array = removeElementWithValueExcept($array, 'owner', $ownerName);
      echo "...Removed claims not owned by $ownerName \n";


      #Sends data back to Land.yml
      $landAfterDump = yaml_emit($array);
      file_put_contents($file, $landAfterDump);
      echo "YAML Data dumped back: \n";
      echo $landAfterDump;
  }
  else {
        echo 'Did not find ' . $ownerName . "\n";
  }
}else {
  echo "Input not recognized. Please run program again.\n";
}


#Remove from array
function removeElementWithValue($array, $key, $value){
     foreach($array as $subKey => $subArray){
          if($subArray[$key] == $value){
               unset($array[$subKey]);
          }
     }
     return $array;
}

#Remove from array except
function removeElementWithValueExcept($array, $key, $value){
     foreach($array as $subKey => $subArray){
          if($subArray[$key] !== $value){
               unset($array[$subKey]);
          }
     }
     return $array;
}

Land.yml 文件：

---
- ID: 0
  startX: 260.000000
  endX: 276.000000
  startZ: 244.000000
  endZ: 256.000000
  price: 22100.000000
  owner: BlockBach
  level: world
  invitee: []
  expires: ~
- ID: 1
  startX: 258.000000
  endX: 276.000000
  startZ: 271.000000
  endZ: 290.000000
  price: 38000.000000
  owner: KeithDavisRatio
  level: world
  invitee: []
  expires: ~
- ID: 2
  startX: 353.000000
  endX: 364.000000
  startZ: 218.000000
  endZ: 253.000000
  price: 43200.000000
  owner: TestDummy1
  level: world
  invitee: []
  expires: ~
- ID: 3
  startX: 317.000000
  endX: 336.000000
  startZ: 302.000000
  endZ: 314.000000
  price: 26000.000000
  owner: TestDummy1
  level: world
  invitee: []
  expires: ~
- ID: 4
  startX: 203.000000
  endX: 223.000000
  startZ: 312.000000
  endZ: 352.000000
  price: 86100.000000
  owner: Elytra1
  level: world
  invitee: []
  expires: ~
- ID: 5
  startX: 157.000000
  endX: 174.000000
  startZ: 318.000000
  endZ: 334.000000
  price: 30600.000000
  owner: Elytra1
  level: world
  invitee: []
  expires: ~
- ID: 6
  startX: 121.000000
  endX: 128.000000
  startZ: 286.000000
  endZ: 299.000000
  price: 11200.000000
  owner: Elytra1
  level: world
  invitee: []
  expires: ~
- ID: 7
  startX: 226.000000
  endX: 244.000000
  startZ: 214.000000
  endZ: 225.000000
  price: 22800.000000
  owner: Haxley
  level: world
  invitee: []
  expires: ~
- ID: 8
  startX: 193.000000
  endX: 222.000000
  startZ: 141.000000
  endZ: 172.000000
  price: 96000.000000
  owner: Haxley
  level: world
  invitee: []
  expires: ~
- ID: 9
  startX: 171.000000
  endX: 199.000000
  startZ: 45.000000
  endZ: 80.000000
  price: 104400.000000
  owner: Haxley
  level: world
  invitee: []
  expires: ~
...

【问题讨论】：

  • 你能发一个Land.yaml的例子吗？
  • 当然，已添加。谢谢。

标签： php arrays parsing yaml pecl


【解决方案1】：

当您修改数组时，您将删除元素而不重新索引。然后yaml_emit 得到一个缺少键的数组，所以它会尝试制作那种奇怪的语法。我不知道这是库中的错误还是所需的行为。

要获得所需的输出，请更改以下行（出现 2 次）：

// Before
$landAfterDump = yaml_emit($array);

// After
$landAfterDump = yaml_emit(array_values($array));

【讨论】：

  • 你是我的英雄！附带说明一下，关于如何为 $file 制作更好的路径名的任何建议？如您所见，这是一条本地路径，但我想要更好的可共享性。
  • 很高兴我能帮上忙。嗯，有很多选择。您可以只使用__DIR__ 魔术常量（文件的目录。）。类似$file = __DIR__ . '/Land.yml';
  • 太棒了，再次感谢！查看github.com/Haxley/LandEdit
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