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This article introduces the relevant knowledge of "how to upload php files". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Upload form upload.html

Program code

HTML

The copy code is as follows:

1. Note that this is a tag, we want to achieve file upload, we must specify as multipart/form-data, otherwise the server will not know what to do.

two。 It is worth noting that the hidden range of the form option MAX_FILE_SIZE in the file upload.html can limit the size of the uploaded file by setting its Value (value).

The value of 3.MAX_FILE_SIZE is just a suggestion for browsers, which can actually be simply bypassed. So don't pin your browser restrictions on this value. In fact, the maximum uploaded file value in the PHP setting will not be invalidated. But it's best to add MAX_FILE_SIZE to the form, because it avoids the hassle of users spending time waiting for a large file to be uploaded before they find it too big.

Parameters involved in PHP uploading files

Program code

PHP

The copy code is as follows:

$f=&$HTTP_POST_FILES ['Myfile']

$dest_dir='uploads';// set upload directory

$dest=$dest_dir.'/'.date ("ymd"). "_". $f ['name']; / / set the file name to date plus the file name to avoid repetition

$r=move_uploaded_file ($f ['tmp_name'], $dest)

Chmod ($dest, 0755); / / set the attributes of the uploaded file

Or

The copy code is as follows:

The contents of the $_ FILES array in the above example are shown below. We assume that the name of the file upload field is userfile (name can be arbitrarily named)

$_ FILES ['userfile'] [' name'] the original name of the client machine file.

The MIME type of the $FILES ['userfile'] [' type'] file, which requires the browser to provide support for this information, such as "image/gif".

$_ FILES ['userfile'] [' size'] the size of the uploaded file in bytes.

The temporary file name stored on the server after the $_ FILES ['userfile'] [' tmp_name'] file is uploaded.

$_ FILES ['userfile'] [' error'] error code related to the file upload

Value: 0; No error occurred and the file was uploaded successfully.

Value: 1; the uploaded file exceeds the limit of the upload_max_filesize option in php.ini.

The size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form.

Value: 3; only part of the file is uploaded.

Value: 4; No files have been uploaded.

The default upload limit for PHP is 2 MB. If you want to upload files that exceed this setting, you need to adjust some parameters such as PHP, apache, etc. Below, we briefly introduce some parameters involved in uploading PHP files:

File_uploads

The switch on whether to allow files to be uploaded via HTTP. Default is ON.

Upload_tmp_dir

Upload_tmp_dir is used to describe the temporary directory for files uploaded by PHP. If you want to upload files, make sure that the server does not close the temporary files and has write permission to the folder. If not specified, PHP uses the system default value.

Upload_max_filesize

The maximum file size allowed to be uploaded, which defaults to 2m

PHP

The copy code is as follows:

Multiple file upload

.border {background-color:#000000}

.box {background-color:#f8f8f9;}

.text {color:#000000

Font-family: song style

Font-size: 12px

Font-weight:bold}

Input, select {font-size: 12px;}

Body {

Margin-top: 8px

}

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