Php file Upload

Php file upload 1, $ _ FILES array

$ _ FILES ["file"] ["name"]: The original name of the uploaded file.

$ _ FILES ["file"] ["type"]: Type of the uploaded file.

$ _ FILES ["file"] ["size"]: The original size of the uploaded file.

$ _ FILES ["file"] ["tmp_name"]: The temporary location of the uploaded file.

$ _ FILES ["file"] ["error"]: If an error occurs during file upload, the error code is displayed.

UPLOAD_ERR_ OKValue: 0. If no error occurs, the file is uploaded successfully.

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

UPLOAD_ERR_FORM_SIZEValue: 2; the size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form. (You can specify the input type = 'den den 'name = 'MAX _ FILE_SIZE 'value = 'maximum number of bytes of the attachment' in the form ')

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

UPLOAD_ERR_NO_FILEValue: 4; no file is uploaded.

II. common file types

Xls: Application/vnd. ms-excel

Xlsx: Application/vnd. openxmlformats-officedocument.spreadsheetml.sheet

Ppt: Application/vnd. ms-powerpoint

Pptx: Application/vnd. openxmlformats-officedocument.presentationml.presentation

Doc: Application/msword

Docx: Application/vnd.openxmlformats-officedocument.wordprocessingml.doc ument

Zip: Application/x-zip-compressed

Rar: Application/x-zip-compressed

Wmv: Video/x-ms-wmv

Mp3: Audio/mpeg

Mp4: Video/mp4

Gif: Image/git

Jpeg: Image/jpeg or image/pjpeg
Note: for IE, the jpg file type must be pjpeg, and for FireFox, it must be jpeg.

III. file upload process

After the file is uploaded, it is stored in the temporary directory by default. in this case, it must be deleted from the temporary directory or moved to another place. if it does not exist, it will be deleted. That is, no matter whether the upload is successful or not, the files in the temporary directory will be deleted after the script is executed. Therefore, you must use the PHPCopy ()OrMove_upload_file ()When the function copies or moves it to another location, the file upload process is completed.

When using form to upload files, attribute content must be added.Enctype = "multipart/form-data"Otherwise, an exception is reported when $ _ FILES [filename] is used to obtain the file information.

4. Save the uploaded file (move_uploaded_file)

BoolMove_uploaded_file(String $ filename, string $ destination)

Parameters:

Filename: File name of the uploaded file.

Destination: Move the file to this location

Return value:

Returns TRUE if the call is successful.

If filename is not a valid file to be uploaded, no operation is performed. move_uploaded_file () returns FALSE.

If filename is valid but cannot be moved for some reason, no operation will occur. move_uploaded_file () returns FALSE. A warning is also issued.

5. a simple file upload example

Note:

2. file processing script 1.php

 = 30720) {# Note: the folder upload must already exist. Otherwise, an error is returned! If (file_exists ("upload/". $ _ FILES ['imgfile'] ['name']) echo "the file already exists. do not upload it again. "; Else move_uploaded_file ($ _ FILES ['imgfile'] ['tmp _ name']," upload /". $ _ FILES ['imgfile'] ['name']); echo "the file is uploaded successfully! ";} Else {echo" is not in jpeg or gif format, or the file size is less than 30 kB! Upload again. ";}}?>

6. thank you

Php file upload;

PHP: move_uploaded_file-Manual;

$ _ FILES variable usage in php;

On PHP ?? Case, thorough? PHP $ _ FILES? Column ?? Upper ?? Case;

Php uploads common file types and $ _ FILES ["file"] ["type"].

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