Question

我有这段代码可以返回3个数组，我想检查所有3个数组中是否有重复项，然后仅保留1个值。但是因为数组是在循环中生成的，所以array_unique / array_ diff不能工作。

这个问题有解决方案吗？

foreach ($ci AS $i) {
    if($i == 0){
        continue;
    }
    $cfsi = $cate->getCategoriesFeatureID($i);
    echo "<pre>";
    print_r($cfsi);
    echo "</pre>";
}

我得到的结果

Array
(
    [0] => 14
    [1] => 15
    [2] => 16
    [3] => 18
    [4] => 19
    [5] => 20
    [6] => 27
)

Array
(
    [0] => 14
    [1] => 15
    [2] => 16
    [3] => 17
    [4] => 18
    [5] => 19
    [6] => 20
    [7] => 21
    [8] => 27
    [9] => 28
)

Array
(
    [0] => 11
    [1] => 14
    [2] => 16
    [3] => 18
    [4] => 19
    [5] => 27
    [6] => 28
)

我正在寻找的结果

Array
(
    [0] => 14
    [1] => 15
    [2] => 16
    [3] => 18
    [4] => 19
    [5] => 20
    [6] => 27
)

Array
(

    [0] => 17
    [1] => 21
    [2] => 28
)

Array
(

    [0] => 11
)

Answer 1

您可以做的是存储先前显示的内容，并且每次仅报告从当前值到此先前值的差异（使用array_diff()）。然后在循环结束时，将当前值移到先前的值。

$previous = [];
foreach ($ci AS $i) {
    if($i == 0){
        continue;
    }
    $cfsi = $cate->getCategoriesFeatureID($i);
    $difference = array_values(array_diff($cfsi, $previous));
    echo "<pre>";
    print_r($difference);
    echo "</pre>";
    $previous = $cfsi;
}

从循环中的数组中删除重复的值

1 个答案: