php 帮助函数

在 composer.json 里自动加载

"autoload": {
        "files": [
            "bootstrap/helpers.php"
        ]
    },

/**
 * 过滤多余空格
 * @param array $arr
 * @return array
 */
function array_filter_blanks(array $arr)
{
    $temp = $arr;
    array_walk($temp, function (&$v) {
        $v = str_filter_blanks($v);
    });
    return $temp;
}

/**
 * 过滤多余空格
 * @param string $str
 * @return string
 */
function str_filter_blanks(string $str)
{
    // 特殊空白符
    $blank1 = chr(128);
    $blank2 = chr(227);
    $str = preg_replace("/[\s$blank1-$blank2]+/", ' ', $str);
    $str = trim($str);
    return $str;
}

/**
 * utf-8化
 * @param $mixed
 * @return array|string
 */
function utf8ize($mixed)
{
    if (is_array($mixed)) {
        foreach ($mixed as $key => $value) {
            $mixed[$key] = utf8ize($value);
        }
    } elseif (is_string($mixed)) {
        return mb_convert_encoding($mixed, "UTF-8", "UTF-8");
    }
    return $mixed;
}