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PHP使用foreach循环如何才能数组数组中的元素？

php

请问PHP使用foreach循环如何才能数组数组中的元素？

<?php
$area = [
    ["name" => "sh", "district" => "上海", "nums" => 0],
    ["name" => "hz", "district" => "杭州", "nums" => 1]
];

foreach ($area as $row) {
    if ($row['nums'] == 0) {
        unset($row);
    }
}
print_r($area);

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15

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要改成as的形式

<?php
$area = [
    ["name" => "sh", "district" => "上海", "nums" => 0],
    ["name" => "hz", "district" => "杭州", "n...

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