PHP：将一个数组插入另一个数组

Question

我正在尝试规范化一串逗号分隔的数字，以及一个范围。演示：

数组：

$array = ["1","2","5-10","15-20"];

应该变成：

$array = [1,2,5,6,7,8,9,10,15,16,17,18,19,20];

我正在研究的算法是：

//get the array values with a range in it :
$rangeArray = preg_grep('[-]',$array);

这将包含["5-10", "16-20"]; 然后：

foreach($rangeArray as $index=>$value){
    $rangeVal = explode('-',$value);
    $convertedArray = range($rangeVal[0],$rangeVal[1]);
}

转换后的数组现在将包含 ["5","6","7","8","9","10"];

我现在面临的问题是，如何在原始数组中弹出值“5-10”，并将值插入到$convertedArray中，这样我就可以得到价值：

$array = ["1","2","5","6","7","8","9","10","16-20 "];

那么，如何将数组插入到数组中？或者有没有更清洁的方法来解决这类问题？将数字和范围值的数组转换为正确排序的数字数组？

Answer 1

给你。 我试图尽可能地减少代码。

考虑下面的初始数组，

$array = ["1","2","5-10","15-20"];

如果您想用它创建一个新数组而不是 $array，请将第一次出现的 $array 下方更改为您想要的任何名称，

$array = call_user_func_array('array_merge', array_map(function($value) {
            if(1 == count($explode = explode('-', $value, 2))) {
                return [(int)$value];
            }
            return range((int)$explode[0], (int)$explode[1]);
        }, $array));

现在，$array 变成了，

$array = [1,2,5,6,7,8,9,10,15,16,17,18,19,20];

---

注意事项：

• 将每个转换后的成员转换为整数
• 如果提供了15-20-25，则考虑15-20并忽略其余部分
• 如果提供了15a-20b，则视为15-20，这是用-分解后大小写为整数的结果，15a变为15
• 将数组键转换为从 0 开始的数字升序
• 仅当给定数组按单个成员和范围成员组合的升序排列时，才会对新数组进行排序

Answer 2

你没有完成一点

$array = ["1","2","5-10","15-20"];
// need to reverse order else index will be incorrect after inserting
$rangeArray = array_reverse( preg_grep('[-]',$array), true);

$convertedArray = $array;

foreach($rangeArray as $index=>$value) {

    $rangeVal = explode('-',$value);
    array_splice($convertedArray, $index, 1, range($rangeVal[0],$rangeVal[1]));
}

print_r($convertedArray);

Answer 3

更简单、更简短的答案。

See in Ideone

$new_array = array();  

foreach($array as $number){
  if(strpos($number,'-')){
     $range = explode('-', $number);  
     $new_array = array_merge($new_array, range($range[0],$range[1]));
  } 
  else{
     $new_array[] = (int) $number;
  }
}

var_dump($new_array);

Answer 4

你来了，伙计。

<?php
$array = ["1","2","5-10","15-20"];
$newArr = array();
foreach($array as $item){
    if(strpos($item, "-")){
        $temp = explode("-", $item);
        $first = (int) $temp[0];
        $last = (int) $temp[1];
        for($i = $first; $i<=$last; $i++){
            array_push($newArr, $i);
        }
    }
    else
        array_push($newArr, $item);
}
print_r($newArr);
?>

Answer 5

试试这个：

$array = ["1","2","5-10","15-20"];
$result = [];

foreach ($array as $a) {
    if (strpos($a,"-")!== false){
        $tmp = explode("-",$a);
        for ($i = $tmp[0]; $i<= $tmp[1]; $i++) $result[] = $i;
    } else {
        $result[] = $a;
    }
}

var_dump($result);

Answer 6

找出最小值和最大值并用它们创建数组更容易。这是一个例子：

$in = ["1","2","5-10","15-20"];
$out = normalizeArray($in);
var_dump($out);

function normalizeArray($in)
{
    if(is_array($in) && sizeof($in) != 0)
    {
        $min = null;
        $max = null;
        foreach($in as $k => $elem)
        {
            $vals = explode('-', $elem);
            foreach($vals as $i => $val)
            {
                $val = intval($val);
                if($min == null || $val < $min)
                {
                    $min = $val;
                }
                if($max == null || $val > $max)
                {
                    $max = $val;
                }
            }
        }

        $out = array();
        for($i = $min; $i <= $max; $i++)
        {
            $out[] = $i;
        }

        return $out;
    }
    else
    {
        return array();
    }
}

Answer 7

试试这个：

<?php
$array = ["1","2","5-10","15-20"];

$newdata = array();
foreach($array as $data){
    if(strpos($data,'-')){

        $range = explode('-', $data);
        for($i=$range[0];$i<=$range[1];$i++){
            array_push($newdata, $i);
        }
    }
    else{
        array_push($newdata, (int)$data);
    }

}

        echo "<pre>";
print_r($array);
        echo "</pre>";
        echo "<pre>";
print_r($newdata);
        echo "</pre>";

---

结果：

Array
(
    [0] => 1
    [1] => 2
    [2] => 5-10
    [3] => 15-20
)
Array
(
    [0] => 1
    [1] => 2
    [2] => 5
    [3] => 6
    [4] => 7
    [5] => 8
    [6] => 9
    [7] => 10
    [8] => 15
    [9] => 16
    [10] => 17
    [11] => 18
    [12] => 19
    [13] => 20
)

问题解决了！

Answer 8

使用 range 和 array_merge 处理非数字值：

$array = ["1","2","5-10","15-20"];

$newArray = [];
array_walk(
    $array,
    function($value) use (&$newArray) {
        if (is_numeric($value)) {
            $newArray[] = intval($value);
        } else {
            $newArray = array_merge(
                $newArray,
                call_user_func_array('range', explode('-', $value))
            );
        }
    }
);

var_dump($newArray);