问如何避免使用空格和/或特殊字符的文件名

EN

// get the uploaded file's temp filename
$tmp_filename = $_FILES['userfile']['tmp_name'];

// get the file's extension
$path = $_FILES['userfile']['name'];
$ext = pathinfo($path, PATHINFO_EXTENSION);

// rename the uploaded file with a timestamp, insert the destination directory and add the extension
$new_filename = 'logos/'.date('Ymdhms').'.'.$ext;

// put the renamed file in the destination directory
move_uploaded_file($tmp_filename, $new_filename);

<?php
     if((isset($_POST["enviado"])) && ($_POST["enviado"] == "form1")) {
        // get the uploaded file's temp filename
        $tmp_filename = $_FILES['userfile']['tmp_name'];

        // get the file's extension
        $path = $_FILES['userfile']['name'];
        $ext = pathinfo($path, PATHINFO_EXTENSION);

        // rename the uploaded with a timestamp file, add the extension and assign the directory
        $new_filename = 'logos/'.date('Ymdhms').'.'.$ext;

        // put the renamed file in the destination directory
        move_uploaded_file($tmp_filename, $new_filename);
    }

<?php
    rename("/tmp/tmp_file.txt", "/home/user/login/docs/my_file.txt");
?>

function get_file_name($string) {
    // Transliterate non-ascii characters to ascii
    $str = trim(strtolower($string));
    $str = iconv('UTF-8', 'ASCII//TRANSLIT', $str);

    // Do other search and replace
    $searches = array(' ', '&', '/');
    $replaces = array('-', 'and', '-');
    $str = str_replace($searches, $replaces, $str);

    // Make sure we don't have more than one dash together because that's ugly
    $str = preg_replace("/(-{2,})/", "-", $str );

    // Remove all invalid characters
    $str = preg_replace("/[^A-Za-z0-9-]/", "", $str );

    // Done!
    return $str;
}