替换 PHP 中多维数组中的内部键 - Replacing inner keys from multidimensional array in PHP

具有以下数组：

array(4) {
  [0]=>
  array(2) {
    [0]=>
    string(3) "233"
    [1]=>
    string(37) "some data"
  }
  [1]=>
  array(2) {
    [0]=>
    string(3) "233"
    [1]=>
    string(68) "some other data"
  }
  [2]=>
  array(2) {
    [0]=>
    string(3) "144"
    [1]=>
    string(38) "some other data"
  }
  [3]=>
  array(2) {
    [0]=>
    string(3) "233"
    [1]=>
    string(42) "some other data"
  }
 }

我想用一些随机的十六进制颜色替换233和144的值（内部数组中0键）。例如，具有相同键（233）的那些必须具有相同的十六进制颜色（例如在上面的所需解决方案中FFF000）。

这是我用来生成随机十六进制颜色的函数：

function randHEXcolor() {
    return sprintf('%06X', mt_rand(0, 0xFFFFFF));
}

我想要的输出应该是：

 array(4) {
  [0]=>
  array(2) {
    [0]=>
    string(6) "FFF000"
    [1]=>
    string(37) "some data"
  }
  [1]=>
  array(2) {
    [0]=>
    string(6) "FFF000"
    [1]=>
    string(68) "some other data"
  }
  [2]=>
  array(2) {
    [0]=>
    string(6) "111333"
    [1]=>
    string(38) "some other data"
  }
  [3]=>
  array(2) {
    [0]=>
    string(6) "FFF000"
    [1]=>
    string(42) "some other data"
  }
 }

我该如何存档？

提前谢谢。

foreach ($array as &$item) {
    if (!isset($temp[$item[0]]) {
        $temp[$item[0]] = randHEXcolor();
    }
    $item[0] = $temp[$item[0]];
}

如果您希望将所有值转换为相同的随机颜色，则必须保存这些颜色：

$colors_translation = array();
foreach ($array as &$item) {
  $color = $item[ 0 ];
  $translate = $colors_translation[ $color ];
  if (empty($translate)) {
    $colors_translations[ $color ] = $translate = randHEXcolor();
  }
  $item[ 0 ] = $translate;
}

使用 in_array 和 isset 函数的解决方案：

$keys = [];
foreach ($arr as &$v) {  // $arr is your initial array
    if (in_array($v[0], ['233', '144'])) {
        if (!isset($keys[$v[0]])) $keys[$v[0]] = sprintf('%06X', mt_rand(0, 0xFFFFFF));
        $v[0] = $keys[$v[0]];
    }
}
print_r($arr);

输出：

Array
(
    [0] => Array
        (
            [0] => 65A4BB
            [1] => some data
        )
    [1] => Array
        (
            [0] => 65A4BB
            [1] => some data
        )
    [2] => Array
        (
            [0] => DDB588
            [1] => some data
        )
    [3] => Array
        (
            [0] => 65A4BB
            [1] => some data
        )
)

此代码将在遍历数组时创建颜色映射表。如果需要预定义的颜色翻译，请预填充$colorMap。

<?php
$array = array(
    0 => array(
        0 => "233",
        1 => "some data"
    ),
    1 => array(
        0 => "233",
        1 => "some data"
    ),
    2 => array(
        0 => "144",
        1 => "some data"
    ),
    3 => array(
        0 => "233",
        1 => "some data"
    ),
);
$colorMap = array();
foreach ($array as &$inner) {
    if (!array_key_exists($inner[0],$colorMap)) {
        $newColor = randHEXcolor();
        $colorMap[$inner[0]] = $newColor;
        $inner[0] = $newColor;
    } else {
        $inner[0] = $colorMap[$inner[0]];
    }
}
function randHEXcolor() {
    return sprintf('%06X', mt_rand(0, 0xFFFFFF));
}
print_r($array);
print_r($colorMap);

Array
(
    [0] => Array
        (
            [0] => F1519A
            [1] => some data
        )
    [1] => Array
        (
            [0] => F1519A
            [1] => some data
        )
    [2] => Array
        (
            [0] => 2F7D00
            [1] => some data
        )
    [3] => Array
        (
            [0] => F1519A
            [1] => some data
        )
)
Array
(
    [233] => F1519A
    [144] => 2F7D00
)

尝试：

<?php
$array = array(
    0 => array(
        0 => "233",
        1 => "some data"
    ),
    1 => array(
        0 => "233",
        1 => "some data"
    ),
    2 => array(
        0 => "144",
        1 => "some data"
    ),
    3 => array(
        0 => "233",
        1 => "some data"
    ),
);
function randHEXcolor() {
    return sprintf('%06X', mt_rand(0, 0xFFFFFF));
}
$firstHex = randHEXcolor();
$secondHex = randHEXcolor();
foreach($array as $arrayIndex => &$arrayValue){
    if($arrayValue[0] == "144"){
        $arrayValue[0] = $firstHex;
    }
    if($arrayValue[0] == "233"){
        $arrayValue[0] = $secondHex;
    }
}

输出：

array(4) {
  [0]=>
  array(2) {
    [0]=>
    string(6) "AB8248"
    [1]=>
    string(9) "some data"
  }
  [1]=>
  array(2) {
    [0]=>
    string(6) "AB8248"
    [1]=>
    string(9) "some data"
  }
  [2]=>
  array(2) {
    [0]=>
    string(6) "22AF8B"
    [1]=>
    string(9) "some data"
  }
  [3]=>
  &array(2) {
    [0]=>
    string(6) "AB8248"
    [1]=>
    string(9) "some data"
  }
}