PHP file upload reference configuration large file upload

PHP uses the super global variablearray $_FILES to record file upload-related information. Before uploading the php file, you can control the upload-related details by adjusting the relevant configuration instructions in php.ini.

1.file_uploads=on/off
Whether to allow uploading files via http
2.max_executi /> Allows the maximum execution time of the script. If it exceeds this time, an error will be reported
3.memory_limit=50M
Set the maximum amount that the script can allocate The amount of memory to prevent runaway scripts from occupying too much memory. This instruction only takes effect when the
--enable-memory-limit flag is set during compilation.
4.upload_max_filesize=20M
The maximum size of uploaded files is allowed, this The command must be less than post_max_size
5.upload_tmp_dir
Upload files Temporary storage directory
6.post_max_size=30M
Allow post mode to accept the maximum size
$_FILES array content is as follows: www.jbxue.com
$_FILES['myFile'] ['name'] The original name of the last file on the client.
$_FILES['myFile']['type'] The MIME type of the file, which requires the browser to provide support for this information, such as "image/gif".
$_FILES['myFile']['size'] The size of the uploaded file, ​​in bytes.
$_FILES['myFile']['tmp_name'] The temporary file name stored on the server after the file is uploaded, usually the system default. It can be specified in upload_tmp_dir in php.ini, but setting it with the putenv() function has no effect.
$_FILES['myFile']['error'] Status code related to the file upload. ['error'] was added in PHP 4.2.0. The following is its description: (They became constants after PHP3.0)
UPLOAD_ERR_OK
Value: 0; No error occurred and the file was uploaded successfully.
UPLOAD_ERR_INI_SIZE
Value: 1; The uploaded file exceeds the value limited by 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 was uploaded.
UPLOAD_ERR_NO_FILE
Value: 4; No file was uploaded.
Value: 5; Upload fileSize is 0.
After the file is uploaded, it is stored in the temporary directory by default. At this time, you must delete it from the temporary directory or move it to other places. If not, will be deleted.

That is, no matter whether the upload is successful or not, the files in the temporary directory will definitely be deleted after the script is executed.

The above introduces the PHP file upload reference configuration for large file upload, including global variables and uploaded files. I hope it will be helpful to friends who are interested in PHP tutorials.