Question

我需要从数组中删除重复的值。

$original_array

Array
(
    [0] => 1 500 2 4 100 51 52
    [1] => 515 5 500
    [2] => 31 351 5 51 61 71 81 91
    [3] => 1 57 101
    [4] => 191 25 101 102
)

我以为我能够通过空间爆炸它们来创建一个多维数组，然后使用array_unique()但这不起作用。

# Create new array
$new_array = array();

# Loop through original_array
foreach($original_array as $original_array_value)
{
    $new_array[] = explode(' ', $original_array_value);
}
print_r($new_array);

输出：

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 500
            [2] => 2
            [3] => 4
            [4] => 100
            [5] => 51
            [6] => 52
        )

    [1] => Array
        (
            [0] => 515
            [1] => 5
            [2] => 500
        )

    [2] => Array
        (
            [0] => 31
            [1] => 351
            [2] => 5
            [3] => 51
            [4] => 61
            [5] => 71
            [6] => 81
            [7] => 91
        )

    [3] => Array
        (
            [0] => 1
            [1] => 57
            [2] => 101
        )

    [4] => Array
        (
            [0] => 191
            [1] => 25
            [2] => 101
            [3] => 102
        )

)

只要没有重复的值，最终的数组结果对我来说并不重要。

Answer 1

你已经到了一半。将其添加到代码的末尾：

$final_array = array();
foreach($new_array as $index => $subarray) {
    $final_array = array_merge($final_array, $subarray);
}
$final_array = array_unique($final_array);

然后代码如下：

$original_array = array(
    '1 500 2 4 100 51 52',
    '515 5 500',
    '31 351 5 51 61 71 81 91',
    '1 57 101',
    '191 25 101 102'
    );

# Create new array.
$new_array=array();

# Loop through original_array.
foreach($original_array as $original_array_value)
{
    $new_array[]=explode(' ', $original_array_value);
}
$final_array = array();
foreach($new_array as $index => $subarray) {
    $final_array = array_merge($final_array, $subarray);
}
$final_array = array_unique($final_array);

echo "<pre>";
print_r($final_array);
echo "</pre>";

更好：合并步骤，如下：

$original_array = array(
    '1 500 2 4 100 51 52',
    '515 5 500',
    '31 351 5 51 61 71 81 91',
    '1 57 101',
    '191 25 101 102'
    );

# Create new array.
$final_array =array();

# Loop through original_array and do the merge at the same time.
foreach($original_array as $original_array_value)
{
    $final_array = array_merge($final_array, explode(' ', $original_array_value) );
}
$final_array = array_unique($final_array);

echo "<pre>";
print_r($final_array);
echo "</pre>";

Answer 2

怎么样：

$arr = array(
    0 => '1 500 2 4 100 51 52',
    1 => '515 5 500',
    2 => '31 351 5 51 61 71 81 91',
    3 => '1 57 101',
    4 => '191 25 101 102',
);

$imp = trim(implode(' ',$arr));
$exp = array_unique(explode(' ', $imp));
var_dump($exp);

<强>输出

Array
(
    [0] => 1
    [1] => 500
    [2] => 2
    [3] => 4
    [4] => 100
    [5] => 51
    [6] => 52
    [7] => 515
    [8] => 5
    [10] => 31
    [11] => 351
    [14] => 61
    [15] => 71
    [16] => 81
    [17] => 91
    [19] => 57
    [20] => 101
    [21] => 191
    [22] => 25
    [24] => 102
)

Answer 3

您可以立即构建一个独特的阵列，而不是使用array_unique()：

$arr = array(
    0 => '1 500 2 4 100 51 52',
    1 => '515 5 500',
    2 => '31 351 5 51 61 71 81 91',
    3 => '1 57 101',
    4 => '191 25 101 102',
);

$result = array();

foreach ($arr as $item) {
        $result += array_flip(explode(' ', $item));
}

+运算符如果相应的键尚不存在，则会向该数组添加新值。最后，您可以通过观察数组键找到答案：

print_r(array_keys($result));

重复数组的值的重复数据删除

3 个答案: