Question

拜托，我需要帮助。如何通过PHP转换我的数组

<div id="showNumPad">
                <ul id="enteredPin"class="pin-list">
                    <li><span></span></li>
                    <li><span></span></li>
                    <li><span></span></li>
                    <li><span></span></li>
                </ul>

                <div class="keypad-container">
                    <ul id="numberList">
                        <li><span>1</span></li>
                        <li><span>2</span></li>
                        <li><span>3</span></li>
                        <li><span>4</span></li>
                        <li><span>5</span></li>
                        <li><span>6</span></li>
                        <li><span>7</span></li>
                        <li><span>8</span></li>
                        <li><span>9</span></li>
                        <li><span>0</span></li>
                    </ul>
                </div>
            </div>

/* CSS is HERE/*

.pin-list{ width:100%; float:left; text-align:center;}
.pin-list li{ display:inline-block;}
.pin-list li span{ width:15px; height:15px; display:inline-block; border:solid 1px #fff; border-radius:50%; margin:7px;}

.keypad-container{ width:100%; float:left; margin:10px 0;}
.keypad-container ul{ width:99%; display:inline-block; text-align:center;}
.keypad-container ul li{ display:inline-block; margin:7px 10px;}
.keypad-container ul li span{ width:60px; height:60px; display:inline-block; border-radius:50%; color:#fff; border:solid 1px #fff; text-align:center; line-height:60px; font-size:25px; cursor:pointer;}
.keypad-container ul li span:hover, .keypad-container ul li span:active, .keypad-container ul li span:focus{ background:#fff; color:#000;}

到此

Array
(
    [0] => Apple
    [1] => Orange
    [2] => Tomato
)

我不知道我的阵列中有多少元素。谢谢大家。

Answer 1

试试这个：

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        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
            imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
            imagePicker.mediaTypes = @[(NSString *) kUTTypeImage];
            imagePicker.allowsEditing = YES;
            [self presentViewController:imagePicker animated:YES completion:nil];

        }

    }

Answer 2

尝试：

$target = array();
$value = array();
$path = array('apple', 'orange', 'tomato');

$rv = &$target;
foreach($path as $pk)
{
    $rv = &$rv[$pk];
}
$rv = $value;
unset($rv);

print_r($target);

输出：

Array
(
    [apple] => Array
        (
            [orange] => Array
                (
                    [tomato] => Array
                        (
                        )

                )

        )

)

更新1：解释

这里我使用引用/变量别名来遍历动态的密钥堆栈。该引用使得可以使用堆栈而不是通常更精益的递归。此外，此代码可防止覆盖$target数组中的现有元素。有关参考文献的更多详细信息，请查看Reference Explained

$target = array(); //target array where we will store required out put
$value = array(); //last value i.e. blank array
$path = array('apple', 'orange', 'tomato'); //current array

$rv = &$target; //assign address of $target to $rv (reference variable)

foreach($path as $pk)
{
    $rv = &$rv[$pk]; // Unused reference [ex. $rv['apple'] then $rv['apple']['orange'] .. so on ] - actually assigned to $target by reference

    print_r($target);
    echo '-----------------<br />';
}
$rv = $value; //here $rv have unused refernce of value tomato so finally assigned a blank array to key tomoto
//
unset($rv); // Array copy is now unaffected by above reference

echo "final array<br />";
print_r($target);

<强>输出：

Array
(
    [apple] => 
)
-----------------
Array
(
    [apple] => Array
        (
            [orange] => 
        )

)
-----------------
Array
(
    [apple] => Array
        (
            [orange] => Array
                (
                    [tomato] => 
                )

        )

)
-----------------
final array
Array
(
    [apple] => Array
        (
            [orange] => Array
                (
                    [tomato] => Array
                        (
                        )

                )

        )

)

在解释输出中，您可以跟踪$target循环中foreach的值

Answer 3

<强>输出

Array
(
    [0] => Apple
    [1] => Orange
    [2] => Tomato
    [3] => Banana
    [4] => Papaya
)
Array
(
    [Apple] => Array
        (
            [Orange] => Array
                (
                    [Tomato] => Array
                        (
                            [Banana] => Array
                                (
                                    [Papaya] => Array
                                        (
                                        )

                                )

                        )

                )

        )

)

<强>代码

$fruits = [

  "Apple",
  "Orange",
  "Tomato",
  "Banana",
  "Papaya"

];

// Result Array

$result = [

  $fruits[count($fruits) - 1] => []

];

// Process

for ($counter = count($fruits) - 2; $counter >= 0; $counter--) {

  $temp = $result;

  unset($result);

  $result[$fruits[$counter]] = $temp;

}

// Display

echo "<pre>".print_r($fruits, true)."</pre>";
echo "<pre>".print_r($result, true)."</pre>";

Answer 4

您也可以使用foreach和ksort

尝试这种方式

<?php

$fruits = array(

  "Apple",
  "Orange",
  "Tomato",
  "Banana",
  "Papaya"

);
krsort($fruits);
$tmp = array();
foreach($fruits as $fruit){
        $tmp =  array($fruit => $tmp);
}
echo "<pre>".print_r($tmp, true)."</pre>";

?>

[概念证明]

Array
(
    [Apple] => Array
        (
            [Orange] => Array
                (
                    [Tomato] => Array
                        (
                            [Banana] => Array
                                (
                                    [Papaya] => Array
                                        (
                                        )

                                )

                        )

                )

        )

)

Answer 5

while循环和array_pop：

$fruits = [
    "Apple",
    "Orange",
    "Tomato",
    "Banana",
    "Papaya"
];

$output = [];
while ( $fruit = array_pop($fruits) )
{
    $output = [$fruit => $output];
}

Answer 6

$result = array_reduce(array_reverse($fruits), function (array $acc, $fruit) {
    return [$fruit => $acc];
}, []);

您只需从内到外开始并将值包装到$key => $value数组中。

如何在PHP中转换数组[嵌套]

6 个答案: