不区分大小写的array_unique

问题描述：

我正在尝试编写几行代码来制作不区分大小写的数组唯一类型函数.这是我到目前为止所拥有的:

I'm trying to write a few lines of code to make a case insensitive array unique type function. Here's what I have so far:

foreach ($topics as $value) {
    $lvalue = strtolower($value);
    $uvalue = strtolower($value);

    if (in_array($value, $topics) == FALSE || in_array($lvalue, $topics) == FALSE || in_array($uvalue, $topics) == FALSE) {
        array_push($utopics, $value);
    }
}

问题在于 if 语句.我认为我的语法有问题，但我对 PHP 比较陌生，我不确定它是什么.有什么帮助吗?

The trouble is the if statement. I think there's something wrong with my syntax, but I'm relatively new to PHP and I'm not sure what it is. Any help?

答

function array_iunique( $array ) {
    return array_intersect_key(
        $array,
        array_unique( array_map( "strtolower", $array ) )
    );
}

不区分大小写的array_unique

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