问使用chop和explode从文件路径提取字符串，但结果数组不打印字母"n“

EN

function my_fontload() {
    // Locate font files
    $font_path = get_stylesheet_directory_uri() . "/path/to/fonts/";
    $files = glob(get_stylesheet_directory( __FILE__ ) . '/path/to/fonts/*.woff', GLOB_BRACE);

    $suffix = '-webfont';
      foreach($files as &$file) {

        $font = basename($file, ".woff");
        $font = chop($font,$suffix);

        $family = explode("-", $font);
        $family = $family[0];

        $style = explode("-", $font);


        echo '@font-face{font-family:\''.$family.'\';src:url('. esc_url(( $font_path).basename($file)).'2)format(\'woff2\'),url('.esc_url(( $font_path).basename($file)).')format(\'woff\');';
        if (in_array('thin', $style) || in_array( 'hairline', $style)) {
            // Do stuff
        } elseif (in_array('regular', $style) || in_array( 'normal', $style)) {
           // Do other stuff
        } else {
            // Do default stuff
        }
        // Other logic here

        // debugging
        print_r($style);
    }

    unset ($file);
}

(
    [0] => merriweather
    [1] => regular
)

(
    [0] => merriweather
    [1] => thin
)

(
    [0] => merriweather
    [1] => hairline
)

(
    [0] => merriweather
    [1] => regular
)

(
    [0] => merriweather
    [1] => thi
)

(
    [0] => merriweather
    [1] => hairli
)