Php file upload reference configuration and large file upload. PHP uses the Super global variable array $ _ FILES to record file upload-related information. before uploading a PHP file, you can adjust it by adjusting 1. file_uploadsonoff: whether to allow file upload via http. PHP uses the Super global variable array $ _ FILES to record file upload-related information. before uploading a PHP file, you can adjust it
1. file_uploads = on/off
Whether to allow file Upload through http
2. max_execution_time = 30
The maximum execution time allowed for the script. if this time is exceeded, an error is returned.
3. memory_limit = 50 M
Set the maximum memory size that can be allocated by the script to prevent the out-of-control script from occupying too much memory. This command is only set during compilation.
-- Enable-memory-limit flag
4. upload_max_filesize = 20 M
Maximum size of the file to be uploaded. this command must be smaller than post_max_size.
5. upload_tmp_dir
Temporary directory for storing uploaded files
6. post_max_size = 30 M
Maximum size allowed for post
The $ _ FILES array contains the following content: www.jbxue.com
$ _ FILES ['myfile'] ['name'] original name of the last file on the client.
$ _ FILES ['myfile'] ['type'] indicates the MIME type of the file, which must be supported by the browser, for example, "image/gif ".
$ _ FILES ['myfile'] ['size'] size of the uploaded file, in bytes.
$ _ FILES ['myfile'] ['tmp _ name'] temporary file name stored on the server after the file is uploaded, which is generally the default file name. It can be specified in upload_tmp_dir of php. ini, but the putenv () function setting does not work.
$ _ FILES ['myfile'] ['error'] status code related to the file upload. ['Error'] is added in PHP 4.2.0. The following is its description: (they become constants after PHP3.0)
UPLOAD_ERR_ OK
Value: 0. If no error occurs, the file is uploaded successfully.
UPLOAD_ERR_INI_SIZE
Value: 1; the uploaded file exceeds the limit of the upload_max_filesize option in php. ini.
UPLOAD_ERR_FORM_SIZE
Value: 2; the size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form.
UPLOAD_ERR_PARTIAL
Value: 3; only part of the file is uploaded.
UPLOAD_ERR_NO_FILE
Value: 4; no file is uploaded.
Value: 5; the size of the uploaded file is 0.
After the file is uploaded, it is stored in the temporary directory by default. you must delete it from the temporary directory or move it 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.
Upload 1. file_uploads = on/off whether to allow uploading files through http...
