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Algorithm PHP函数,用于根据变量条件提取多维数组的部分_Algorithm_Multidimensional Array_Php 5.3 - Fatal编程技术网

Algorithm PHP函数,用于根据变量条件提取多维数组的部分

Algorithm PHP函数,用于根据变量条件提取多维数组的部分,algorithm,multidimensional-array,php-5.3,Algorithm,Multidimensional Array,Php 5.3,给定一个多维数组,我正在寻找一种方法,在给定变量(即不同的)条件下提取该数组的各个部分 例如,如果这是我的数据: array( '0' => array( '0' => 'aaaaaa', '1' => 'bbbbb', '2' => 'ccccc' ), '1' => array( '0' => 'aa2ssa', '1' => 'bb3242bb,

给定一个多维数组,我正在寻找一种方法,在给定变量(即不同的)条件下提取该数组的各个部分

例如,如果这是我的数据:

array(
  '0' => array(
        '0' => 'aaaaaa',
        '1' => 'bbbbb',
        '2' => 'ccccc'
  ), 
  '1' => array(
        '0' => 'aa2ssa',
        '1' => 'bb3242bb,
        '2' => 'ccccc234'
  ),
  '2' => array(
        '0' => 'aaa234aa',
        '1' => 'b3242b',
        '2' => 'cewrcc'
  ),
      (etc)
)
我想能够调用一个函数

function new_array( index, sub_index )      
返回一个基于索引和子索引参数的数组。使用相同的数据但不同的参数将返回不同的数据

例1
new_数组(数组(0,2)、(数组(1,2)、数组(0,2)))

预期成果:

array(
  '0' => array(
        '1' => 'bbbbb',
        '2' => 'ccccc'
  ), 
  '2' => array(
        '0' => 'aaa234aa',
        '2' => 'cewrcc'
  )
)
array(
  '2' => array(
        '0' =>'aaa234aa',
        '1' => 'b3242b'
  )
)
例2
new_数组(数组(2)、(数组(0,2)))

预期成果:

array(
  '0' => array(
        '1' => 'bbbbb',
        '2' => 'ccccc'
  ), 
  '2' => array(
        '0' => 'aaa234aa',
        '2' => 'cewrcc'
  )
)
array(
  '2' => array(
        '0' =>'aaa234aa',
        '1' => 'b3242b'
  )
)
有人知道怎么做吗?谢谢大家!

为什么不

$a = array('0' => 
               array('1' => 'bbbb', 
                     '2' => 'ccccc'), 
           '2' => 
               array('0' => 'aaaa', 
                     '2' => 'cewrcc')
           );
为什么要使用函数来做同样的事情?

为什么不只是

$a = array('0' => 
               array('1' => 'bbbb', 
                     '2' => 'ccccc'), 
           '2' => 
               array('0' => 'aaaa', 
                     '2' => 'cewrcc')
           );

为什么要使用函数来执行相同的操作?

假设您希望函数处理现有数组并过滤掉数据,那么您可以执行以下操作:

function new_array($original, $topKeys, $subKeys) {
    if (count($topKeys) != count($subKeys)) {
        return $original;
    }

    $newArray = array();
    foreach ($topKeys as $cTopKey) {
        $cSubKeys = array_shift($subKeys);

        if (array_key_exists($cTopKey, $original)) {
            $newArray[$cTopKey] = array();
            foreach ($cSubKeys as $cSubKey) {
                if (array_key_exists($cSubKey, $original[$cTopKey])) {
                    $newArray[$cTopKey][$cSubKey] = $original[$cTopKey][$cSubKey];
                }
            }
        }
    }

    return $newArray;
}
如果您有PHP v5.1+,并且保证索引可用,那么我相信您可以做得更简单:

function new_array($original, $topKeys, $subKeys) {
    $newArray = array_intersect_key($original, array_flip($topKeys));
    foreach ($newArray as $cKey => $cSub) {
        $cSubKeys = array_shift($subKeys);
        $newArray[$cKey] = array_intersect_key($cSub, $cSubKeys);
    }

    return $newArray;
}

其中的危险是我不知道是否定义了
数组\u intersect\u key()
来保持元素的原始顺序。如果没有,则需要添加进一步的代码,以将子键与原始子键匹配,理想情况下,子键无论如何都将是第一个参数的子数组。

假设您希望函数处理现有数组并过滤掉数据,那么您可以这样做:

function new_array($original, $topKeys, $subKeys) {
    if (count($topKeys) != count($subKeys)) {
        return $original;
    }

    $newArray = array();
    foreach ($topKeys as $cTopKey) {
        $cSubKeys = array_shift($subKeys);

        if (array_key_exists($cTopKey, $original)) {
            $newArray[$cTopKey] = array();
            foreach ($cSubKeys as $cSubKey) {
                if (array_key_exists($cSubKey, $original[$cTopKey])) {
                    $newArray[$cTopKey][$cSubKey] = $original[$cTopKey][$cSubKey];
                }
            }
        }
    }

    return $newArray;
}
如果您有PHP v5.1+,并且保证索引可用,那么我相信您可以做得更简单:

function new_array($original, $topKeys, $subKeys) {
    $newArray = array_intersect_key($original, array_flip($topKeys));
    foreach ($newArray as $cKey => $cSub) {
        $cSubKeys = array_shift($subKeys);
        $newArray[$cKey] = array_intersect_key($cSub, $cSubKeys);
    }

    return $newArray;
}

其中的危险是我不知道是否定义了
数组\u intersect\u key()
来保持元素的原始顺序。如果没有,则需要添加进一步的代码以将子键与原始子键匹配,理想情况下,子键无论如何都将是第一个参数的子数组。

另一种@Orbling的解决方案是:

function populateData() // CHANGE ME to populate the info how you please
{
  $seed = 'abcdefghijklmnopqrstuvwxyz0123456789';
  $_ = ''; $length = rand(5,8);
  for ($__ = 0; $__ < $length; $__++) $_ .= substr($seed,rand(0,strlen($seed)),1);
  return $_;
}

function new_array()
{
  $args = func_num_args();
  if ($args == 0)
    return FALSE; // flag error if no arguments are passed

  $template = func_get_arg(0);
  if ($template == null || !is_array($template) || $args < (count($template)+1))
    return FALSE; // flag error if we don't have enough information

  $resultAry = Array();
  $arg = 1;
  foreach ($template as $t)
  {
    $resultArySub = Array();

    $templateSub = func_get_arg($arg++);
    if ($templateSub == FALSE || !is_array($templateSub)) 
      return FALSE; // error checking for valid input

    foreach ($templateSub as $tS)
      $resultArySub[$tS] = populateData();

    $resultAry[$t] = $resultArySub;
  }
  return $resultAry;
}

header('Content-Type: text/plain');
echo "your request (or so i understood):\r\n";
$test = new_array(array(0,2),array(1,2),array(0,2));
var_dump($test);

echo "\r\nextra array on end is ignored:\r\n";
$test = new_array(array(4,2),array(1,2),array(0,2),array(3,5));
var_dump($test);

echo "\r\nno data is a FALSE:\r\n";
$test = new_array();
var_dump($test);

echo "\r\ntoo few arguments for what was supplied in first argument is a FALSE:\r\n";
$test = new_array(array(1,2,3),array(4,5),array(6,7));
var_dump($test);

echo "\r\nas long as there's as \"array argument\" for every element of the \"first argument\", this will work:\r\n";
$test = new_array(array(1,2,3,4,5,6,7),array(1),array(2),array(3),array(4),array(5),array(6),array(7));
var_dump($test);

echo "\r\nall arguments must be an array\r\n";
$test = new_array(array(1,2),'not','arrays');
var_dump($test);

@Orbling的另一种解决方案是:

function populateData() // CHANGE ME to populate the info how you please
{
  $seed = 'abcdefghijklmnopqrstuvwxyz0123456789';
  $_ = ''; $length = rand(5,8);
  for ($__ = 0; $__ < $length; $__++) $_ .= substr($seed,rand(0,strlen($seed)),1);
  return $_;
}

function new_array()
{
  $args = func_num_args();
  if ($args == 0)
    return FALSE; // flag error if no arguments are passed

  $template = func_get_arg(0);
  if ($template == null || !is_array($template) || $args < (count($template)+1))
    return FALSE; // flag error if we don't have enough information

  $resultAry = Array();
  $arg = 1;
  foreach ($template as $t)
  {
    $resultArySub = Array();

    $templateSub = func_get_arg($arg++);
    if ($templateSub == FALSE || !is_array($templateSub)) 
      return FALSE; // error checking for valid input

    foreach ($templateSub as $tS)
      $resultArySub[$tS] = populateData();

    $resultAry[$t] = $resultArySub;
  }
  return $resultAry;
}

header('Content-Type: text/plain');
echo "your request (or so i understood):\r\n";
$test = new_array(array(0,2),array(1,2),array(0,2));
var_dump($test);

echo "\r\nextra array on end is ignored:\r\n";
$test = new_array(array(4,2),array(1,2),array(0,2),array(3,5));
var_dump($test);

echo "\r\nno data is a FALSE:\r\n";
$test = new_array();
var_dump($test);

echo "\r\ntoo few arguments for what was supplied in first argument is a FALSE:\r\n";
$test = new_array(array(1,2,3),array(4,5),array(6,7));
var_dump($test);

echo "\r\nas long as there's as \"array argument\" for every element of the \"first argument\", this will work:\r\n";
$test = new_array(array(1,2,3,4,5,6,7),array(1),array(2),array(3),array(4),array(5),array(6),array(7));
var_dump($test);

echo "\r\nall arguments must be an array\r\n";
$test = new_array(array(1,2),'not','arrays');
var_dump($test);


您想用随机数据填充函数传递的项吗?需要依赖于传递的参数的新_数组。数据来自哪里?你的问题越清楚,你的答案就越精确……你想用随机数据填充函数传递的项吗?需要依赖于传递的参数的新数组。数据来自哪里?你的问题越清楚,你的答案就越精确…需要依赖于已传递参数的新数组。需要依赖于已传递参数的新数组。数据的来源还有待观察,你的来源和我的一样合理。这充其量只是在黑暗中拍摄。哦,有点语言障碍,缺乏细节。他给了你一个接受的机会,所以我猜这是随机数据,哈哈@奥普林:嘿,我还以为你拿到了呢。我把评论回复给你,看到你被录取了。我重游,我拥有它。我为抢了你的风头而道歉。我保证我会尊重火炬哈哈,我不知道发生了什么,也不知道我们谁是对的。谢谢你纪念我。;-)数据的来源还有待观察,你的来源和我的一样明智。这充其量只是在黑暗中拍摄的。哦,有点语言障碍,缺乏细节。他给了你一个接受的机会,所以我猜这是随机数据,哈哈@奥普林:嘿,我还以为你拿到了呢。我把评论回复给你,看到你被录取了。我重游,我拥有它。我为抢了你的风头而道歉。我保证我会尊重火炬哈哈,我不知道发生了什么,也不知道我们谁是对的。谢谢你纪念我。;-)谢谢你的回答并理解我的问题。谢谢你的回答并理解我的问题。