您可以使用sanitize_file_name 钩住这个。

function my_sanitize_file_name( $filename ) {
    $chars_table = array(
        \' \' => \'_\',
        \'-\' => \'_\',
    );

    $friendly_filename = preg_replace( array_keys( $chars_table ), array_values( $chars_table ), $filename );

    return strtolower( $friendly_filename );
}
add_filter( \'sanitize_file_name\', \'my_sanitize_file_name\', 10 );