Question

大家好的一天，如果名称和文件扩展名与其中一个已保存的记录匹配，我想阻止上传文件。我的代码可以使用，但如何避免重复输入？

"My sample array"
Array
(
    [upload-file] => Array
        (
            [name] => Penguins.jpg
            [type] => image/jpeg
            [tmp_name] => C:\xampp\tmp\phpC87.tmp
            [error] => 0
            [size] => 777835
        )

)

case 'upload-file':

    $arr = [ 
        ":userid" => $_SESSION['loggedIn_PH'][0]['user_id'],
        ":filename" => $_FILES['upload-file']['name'],
        ":filelink" => $_FILES['upload-file']['tmp_name']
        ];

        $allowed =  array('xls','xlsx');
        $filename = $_FILES['upload-file']['name'];
        $ext = pathinfo($filename, PATHINFO_EXTENSION);

        if(!in_array($ext,$allowed) ) {
            $response_code = -1;
        }else{
            $response_code = 1;
            $folder = time();
            mkdir("path/".$folder);
            $file = "path".DIRECTORY_SEPARATOR.$folder.DIRECTORY_SEPARATOR.$_FILES['upload-file']['name'];
                    move_uploaded_file($_FILES['upload-file']['tmp_name'], $file);

        $query = "INSERT INTO file_rec_tbl ( `file_name`, `file_datetime`,`file_link`, `user_id` )
                    VALUES (:filename, '".date('Y-m-d H:i:s')."',:filelink,:userid)";

        $stmt = $con -> prepare( $query );
        $stmt -> execute( $arr );

    }

    exit(json_encode(array('r_code' => $response_code)));
    break;

Answer 1

<?php
$file='file-to-check.ext';
if (file_exists($file)) {
    echo "exists";
} else {
    echo "not exist";
}
?>

对我有用 - 显然$ file也可以包含一个路径 - 这个脚本只检查当前文件夹

Answer 2

简单的代码可以这样：

$file_name = 'path/to/file_name.ext';
if (file_exist($file_name)) {
    return true;
} else {
    move_uploaded_file($_FILES['upload-file']['tmp_name'], $file_name);
    insert into database;
    return true;
}

此外，您不应该将两个文件与文件名进行比较。

Answer 3

T1 = table(['M';'F';'MM'])
Dimensions of matrices being concatenated are not consistent.

如何避免使用PHP上传重复文件？

3 个答案: