Question

我是一名新手php程序员，并且在编写此代码时遇到问题。我正在努力的是这个，

From this:
----------------------------
Array
(
    [0] => Array
        (
            [0] => apples,
            [1] => oranges,
            [2] => lettuce,
        )

    [1] => Array
        (
            [0] => bananas,
            [1] => grapes,
            [2] => cabbage,
        )

    [2] => Array
        (
            [0] => pears,
            [1] => mangoes,
            [2] => celery,
        )

)

----------------------------
To this:

Array
(
    [0] => Array
        (
            [0] => apples,
            [1] => oranges,
            [2] => lettuce?
        )

    [1] => Array
        (
            [0] => bananas,
            [1] => grapes,
            [2] => cabbage?
        )

    [2] => Array
        (
            [0] => pears,
            [1] => mangoes,
            [2] => celery?
        )

)
---------------------------

正如你所看到的，我很厌倦用“？”代替“，”每个子数组中每个最后一个元素的每个最后一个字符上的问号。

代码方式这就是我现在所处的位置：

    $array = array("apples,", "oranges,", "lettuce,", "bananas,", "grapes,", "cabbage,", "pears,", "mangoes,", "celery,");

    $subarrays = array_chunk($array, 3);
    print_r($miniarrays);

    foreach ($subarrays as $value){

    //$output1 = array_slice($value, 2, 1, true); #<== required maybe?
    $output1 = array_slice($value, 2, 1);
    print_r($output1); #<== debug purposes only

     foreach ($output1 as $val){

     $locate = $val[strlen($val)-1];
     print_r($result); #<== debug purposes only

     //foreach ($result as $val2) #<== required maybe?
     $output3 = strtr($locate, ",", "?");
     //echo $output2;
     print_r($output3); #<== debug purposes only
    }
   }

-

麻烦的是我被指针锁定了，我的字符串函数和数组函数相互交互，同时又厌倦遍历每个子数组。我尝试了功能化代码，但无法弄清楚如何让php显示原始数组结构，并在每个数组中最后一个元素的每个最后一个字符上编辑问号，Yaakes。

如上所述，我是一个新手，这是我参与过的最难的功能之一。我也很累，想要找到一个更好的方法，不使用php字符串函数，只考虑我认为的数组函数我的做法是错的。任何建议，伪代码或知识和方向都会非常感激，以提高我对这个主题的理解，谢谢〜

Answer 1

我认为你的解决方案过于复杂，只需遍历每三个元素并将它们结合起来：

$arr = array("apples,", "oranges,", "lettuce,", "bananas,", "grapes,", "cabbage,", "pears,", "mangoes,", "celery,");
$result = array();
for($i = 0; $i < count($arr); $i+=3){
    $s = $arr[$i + 2];
    $s[strlen($s) - 1] = '?';
    $result[] = array($arr[$i], $arr[$i + 1], $s);
}

如果数组的大小不是3的倍数，那么最后一个元素会出现问题。

Answer 2

作为多维数组的函数：

<?php

    // Start array
    $array = array(array("apples", "oranges", "lettuce"),array("bananas", "grapes", "cabbage"),array("pears", "mangoes", "celery"));

    $newArray = addtoarray($array, "?");

    // Echo out the new array
    foreach ($newArray as $aKey => $aValue) {

        echo "Array: {$aKey}<br />";

        foreach ($aValue as $key => $value) {

            echo "Key: ". $key . " - Value: " . $value . "<br />";
        }

        echo "<br />";
    }

    function addtoarray($array, $stringtoadd) {

        $newArray = array();

        foreach ($array as $aValue) {

            $count = count($aValue);

            $tArray = array();

            foreach ($aValue as $key => $value) {

                if ($key == $count - 1) {

                    array_push($tArray, $value . $stringtoadd);
                }
                else {

                    array_push($tArray, $value);
                }
            }

            array_push($newArray, $tArray);
        }

        return $newArray;
    }

?>

Answer 3

尝试：

foreach ($subarrays as $value){
    //replaces all occurences of ',' with '?' within the last element of the subarray
    $value[sizeof($value)-1] = str_replace(',', '?', $value[sizeof($value)-1]);
}

OR

foreach ($subarrays as $value){
    //replaces last character with '?' within the last element of the subarray
    $value[sizeof($value)-1] = substr($value[sizeof($value)-1], 1, strlen($value[sizeof($value)-1])-1) . '?';
}

或更易读的版本：

foreach ($subarrays as $value){
    //replaces last character with '?' within the last element of the subarray
    $str = $value[sizeof($value)-1];
    $value[sizeof($value)-1] = substr($str, 1, strlen($str)-1) . '?';
}

Answer 4

您可以将preg_replace函数用作 -

$array = array("apples,", "oranges,", "lettuce,", "bananas,", "grapes,", "cabbage,", "pears,", "mangoes,", "celery,");

for($i=2;$i<count($array);$i=$i+3)
  $array[$i]= preg_replace('/^([a-z]+),$/','${1}?',$array[$i]);

print_r($array);

php编辑数组数组中最后一个元素出现的最后一个char

4 个答案: