PHP upload file Reference configuration large file upload _php instance

PHP with the Super global variable array $_files to record file upload related information, in the php file upload, you can adjust the php.ini in the relevant configuration instructions, to control the upload related details.

1.file_uploads=on/off

Whether to allow uploading of files via HTTP

2.max_execution_time=30

Allow the script to execute at maximum time, and the error will be exceeded at this time

3.memory_limit=50m

Set the maximum amount of memory the script can allocate to prevent runaway scripting from consuming too much RAM, which is set at compile time only
--enable-memory-limit sign of the case before it takes effect

4.upload_max_filesize=20m

Allow maximum size of uploaded file, this instruction must be less than post_max_size

5.upload_tmp_dir

Upload file Temporary storage directory

6.post_max_size=30m

Allow post mode to accept maximum size

The $_files array reads as follows: Www.jb51.net

$_files[the original name of the last file for the ' myFile ' [' Name '] client.

The MIME type of the $_files[' myFile ' [' type '] file requires the browser to provide support for that information, such as "Image/gif".

$_files[' myFile ' [' size '] the size of the uploaded file, in bytes.

$_files[' myFile ' [' tmp_name '] files are stored in the server after the temporary file name, typically the system default. Can be specified in the php.ini upload_tmp_dir, but the putenv () function setting does not work.

$_files[' myFile ' [' Error '] and the file upload related status code. [' ERROR '] is added in PHP version 4.2.0. Here's what it says: (They're constant after PHP3.0)

Upload_err_ok

Value: 0; No error occurred, file upload succeeded.

Upload_err_ini_size

Value: 1; The uploaded file exceeds the value of the Upload_max_filesize option limit in php.ini.

Upload_err_form_size

Value: 2; The size of the upload file exceeds the value specified by the Max_file_size option in the HTML form.

Upload_err_partial

Value: 3; The file is only partially uploaded.

Upload_err_no_file

Value: 4; No files were uploaded.

Value: 5; The upload file size is 0.
When the file is uploaded, it is stored in the temporary directory by default, and you must remove it from the temporary directory or move it to another location, if not, it will be deleted.

That is, whether or not the upload succeeds, the files in the temp directory will be deleted after the script is executed.

Attach: Modify PHP Upload File size limit method

1. general file upload, unless the file is very small. Like a 5M file, it's likely to take more than a minute to upload.

In PHP, however, the default page execution time is 30 seconds. That means more than 30 seconds, and the script stops executing.

This results in a situation where the Web page cannot be opened. Then we can modify the Max_execution_time

Look in the php.ini.

Max_execution_time

The default is 30 seconds.

Max_execution_time = 0

0 means no Limit

2. Modify Post_max_size to set the maximum allowable size for post data. This setting also affects file uploads.

The default post_max_size for PHP is 2M. If the POST data size is greater than post_max_size $_post and $_files superglobals will be empty.
Find Post_max_size. instead

Post_max_size = 150M

3. A lot of people will change the second step. But when uploading files, the maximum is still 8M.

Why not? We also need to change a parameter upload_max_filesize represents the maximum size of the uploaded file.

Find Upload_max_filesize, default to 8M instead

Upload_max_filesize = 100M

In addition, Post_max_size is better than upload_max_filesize.