Question

拥有像[1]

这样的数组

$arr = array(
        array(
            "ignoreMe" => "123",
            "checkMe" => "value",
        ),
        array(
            "ignoreMe" => "456",
            "checkMe" => "value",
        ),
 );

我想检查内部数组的特殊键（此处为键checkMe）是否具有相同的值。如果所有键具有相同的值，那么我想从内部数组中删除键。（来自所有阵列）

但是当有一个像[2]

这样的数组时

$arr = array(
        array(
            "ignoreMe" => "123",
            "checkMe" => "value",
        ),
        array(
            "ignoreMe" => "456",
            "checkMe" => "value",
        ),
        array(
            "ignoreMe" => "789",
            "checkMe" => "foo", 
        ),
 );

所有按键应保持完整。

我如何使用这个复杂的验证器做到这一点？（链接https://github.com/Respect/Validation）

[1]的预期结果是

$arr = array(
        array(
            "ignoreMe" => "123",
        ),
        array(
            "ignoreMe" => "456",
        ),
 );

不应该触及

[2]

以下是尝试过的内容：

$validator = v::arr()->each(v::key("check", v::equals('value')));

Answer 1

好的，如果您运行的是PHP 5.5+，那么您可以使用array_column和array_unique函数的组合来删除数组中的项，如果它们都具有相同的值：

我不确定究竟会调用什么函数，所以我只称它myFunc ...

function myFunc(array $arr, $key)
{
    // Get all the values using a key
    $values = array_column($arr, $key);

    // Remove all duplicates
    $unique = array_unique($values);

    // If there only is one item left then it means
    // that all the values are the same, so proceed
    // with modifying it...
    if (count($unique) === 1) {

        // Go over each array...
        foreach ($arr as $x => & $value) {

            // And unset the key
            unset($value[$key]);
        }
    }
    // Return the array
    return $arr;
}

示例：

$arr1 = array(
    array("ignoreMe" => "123", "checkMe" => "value"),
    array("ignoreMe" => "456", "checkMe" => "value"),
);
$arr2 = array(
    array("ignoreMe" => "123", "checkMe" => "value"),
    array("ignoreMe" => "456", "checkMe" => "value"),
    array("ignoreMe" => "789", "checkMe" => "foo"),
);

// All the values in this array are the same, so they
// will be removed
var_dump($arr1);
var_dump(myFunc($arr1, 'checkMe'));
echo '<hr>';

// There is a value in this array that is not the same
// as the others, so this array will be left intact
var_dump($arr2);
var_dump(myFunc($arr2, 'checkMe'));

验证PHP数组键＆gt;值

1 个答案: