Question

如果有人知道请帮我构建一个有效的正则表达式 - 文件名中不允许使用特殊字符 - 只能上传MS Word文件（.docx，.doc，excel，ppt等） - 文件名不能超过80个字符感谢

Answer 1

用什么语言？试试这个：

/^[A-Za-Z][A-Za-z0-9_ ]\.(docx|doc|xls|ppt|etc)$/

然后分别检查长度。你需要扩展/编辑后缀列表（等等显然不是一个合法的后缀。:)

Answer 2

[a-z0-9A-Z-\s*]{1,80}\.(docx|doc|excel|ppt)

添加您需要分隔的任何文件扩展名|

Answer 3

所有积分都转到finalwesites.com，我已经调整了他们的演示文件以满足您的需求在http://www.finalwebsites.com/demos/php_file_upload.php

进行现场演示（没有调整）

<?php
require dirname(__FILE__).'/upload_class.php'; // Download it @ http://pastebin.com/zAsn8V6R
$folder = dirname(__FILE__)."/upload/"; // "upload" is the folder for the uploaded files (you have to create this folder)

function select_files($dir) {
    // removed in ver 1.01 the globals 
    $teller = 0;
    if ($handle = opendir($dir)) {
        $mydir = "<p>These are the files in the directory:</p>\n";
        $mydir .= "<form name=\"form1\" method=\"post\" action=\"".$_SERVER['PHP_SELF']."\">\n";
        $mydir .= "  <select name=\"file_in_folder\">\n";
        $mydir .= "    <option value=\"\" selected>...\n";
        while (false !== ($file = readdir($handle))) {
            $files[] = $file;
        }
        closedir($handle); 
        sort($files);
        foreach ($files as $val) {
            if (is_file($dir.$val)) { // show only real files (ver. 1.01)
                $mydir .= "    <option value=\"".$val."\">";
                $mydir .= (strlen($val) > 30) ? substr($val, 0, 30)."...\n" : $val."\n";
                $teller++;  
            }
        }
        $mydir .= "  </select>";
        $mydir .= "<input type=\"submit\" name=\"download\" value=\"Download\">";
        $mydir .= "</form>\n";
    }
    if ($teller == 0) {
        echo "No files!";
    } else { 
        echo $mydir;
    }
}
if (isset($_POST['download'])) {
    $fullPath = $folder.$_POST['file_in_folder'];
    if ($fd = fopen ($fullPath, "rb")) {
        $fsize = filesize($fullPath);
        $path_parts = pathinfo($fullPath); 
        $ext = strtolower($path_parts["extension"]); 
        switch ($ext) {
            case "pdf":
            header("Content-type: application/pdf");
            header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); 
            break;
            case "docx":
            header("Content-type: application/docx");
            header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); 
            break;
            case "doc":
            header("Content-type: application/doc");
            header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); 
            break;
            case "xls":
            header("Content-type: application/xls");
            header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); 
            break;
            case "ppt":
            header("Content-type: application/ppt");
            header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); 
            break;
            case "txt":
            header("Content-type: application/txt"); 
            header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
            break;
            case "odt":
            header("Content-type: application/odt"); 
            header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
            break;
            default;
            header("Content-type: application/octet-stream");
            header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
        }
        header("Content-length: $fsize");
        header("Cache-control: private"); 
        while(!feof($fd)) {
            $buffer = fread($fd, 2048);
            echo $buffer;
        }
    }
    fclose ($fd);
    exit;
}
function del_file($file) {
    $delete = @unlink($file); 
    clearstatcache();
    if (@file_exists($file)) { 
        $filesys = eregi_replace("/","\\",$file); 
        $delete = @system("del $filesys");
        clearstatcache();
        if (@file_exists($file)) { 
            $delete = @chmod ($file, 0775); 
            $delete = @unlink($file); 
            $delete = @system("del $filesys");
        }
    }
}
function get_oldest_file($directory) {
    if ($handle = opendir($directory)) {
        while (false !== ($file = readdir($handle))) {
            if (is_file($directory.$file)) { // add only files to the array (ver. 1.01)
                $files[] = $file;
            }
        }
        if (count($files) <= 12) {
            return;
        } else {
            foreach ($files as $val) {
                if (is_file($directory.$val)) {
                    $file_date[$val] = filemtime($directory.$val);
                }
            }
        }
    }
    closedir($handle);
    asort($file_date, SORT_NUMERIC);
    reset($file_date);
    $oldest = key($file_date);
    return $oldest;
}

$max_size = 1024*2000; // the max. size for uploading = 2000 KB, change this to fit your needs
$my_upload = new file_upload;

$my_upload->upload_dir = $folder;
$my_upload->extensions = array(".docx", ".ppt", ".doc", ".pdf", ".xls", ".odt", ".txt"); // specify the allowed extensions here


if(isset($_POST['Submit'])) {
    $my_upload->the_temp_file = $_FILES['upload']['tmp_name'];
    $my_upload->the_file = $_FILES['upload']['name'];
    $my_upload->http_error = $_FILES['upload']['error'];
    $my_upload->replace = (isset($_POST['replace'])) ? $_POST['replace'] : "n";
    $my_upload->do_filename_check = (isset($_POST['check'])) ? $_POST['check'] : "n"; 
    if ($my_upload->upload()) {
        $latest = get_oldest_file($folder);
        del_file($folder.$latest);
    }
}

?> 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Demo: File upload/download and open directory</title>

<style type="text/css">
<!--
body {
    font-family: Arial, Helvetica, sans-serif;
    text-align:center;
}
p {
    font-size: 14px;
    line-height: 20px;
}
label {
    font: 14px/20px Arial, Helvetica, sans-serif;
    margin-top: 5px 0 0;
    float:left;
    display:block;
    width:120px;
}
#main {
    width:350px;
    margin:0 auto;
    padding:10px;
    text-align:left;
    border: 1px solid #000000;
}
input {
    margin-left:5px;
}
-->
</style>
</head>

<body>
<div id="main">
  <h2 style="text-align:center;margin-top:10px;">Demo page:</h2>
  <p align="center">(File upload/download and open directory)</p>
  <p>Max. filesize: <b><?php echo $max_size/1024; ?> KB</b><br>
  <?php 
  $ext = "Allowed extensions are: <b>";
  foreach ($my_upload->extensions as $val) {
      $ext .=  ltrim($val, ".").", ";
  } 
  echo rtrim($ext, ", ")."</b>";
  ?>
  </p>
  <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" enctype="multipart/form-data" name="form1">
    <input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_size; ?>">
    <center><input type="file" name="upload" id="upload" size="25"></center>
    <label for="replace">Replace?</label>
    <input type="checkbox" name="replace" id="replace" value="y"><br clear="all">
    <label for="check">Validate filename ?</label>
    <input name="check" type="checkbox" id="check" value="y" checked>
    <br clear="all">
    <center><input type="submit" name="Submit" id="Submit" value="Submit"></center>
  </form>
  <p style="margin-top:20px;color:#FF0000;"><?php echo $my_upload->show_error_string(); ?></p>
  <?php echo select_files($folder); ?>
</div>  
</body>
</html>

文件上传正则表达式

3 个答案: