php数组从其他数组中按值搜索键和值

$value = '要搜索的值';
$array = array('键1' => '值1', '键2' => '值2', '键3' => '值3');

$key = array_search($value, $array);
if ($key !== false) {
    echo "找到了，键为：" . $key;
} else {
    echo "未找到";
}

$value = '要搜索的值';
$array = array('键1' => '值1', '键2' => '值2', '键3' => '值3');

$keys = array_keys($array, $value);
if (!empty($keys)) {
    echo "找到了，键为：" . implode(', ', $keys);
} else {
    echo "未找到";
}