php foreach and positions



php

$new_position = $_POST['new_position'];
$new_positionpieces = explode(",", $new_position);
foreach ($new_positionpieces as $value) {
    echo $value."<br>";
}

cat_37<br>cat_36<br>

从我收集的信息来看,如果我echo $new_positionpieces[0]它会说cat_37

怎样才能将那个 0 放入我foreach内的变量中,以便 如果它是类似

echo $item.' - '.$value.'<br>';并输出0 - cat_37以便我能够将其放入我的数据库中

foreach ($new_positionpieces as $key => $value) {
    echo $key . "=" . $value . "<br>";
}

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