PHP Upload File Size Limitations of the method of explanation

Open PHP.ini, first find
File_uploads = on; switch to allow uploading of files over HTTP. The default is on, which is open
Upload_tmp_dir; files uploaded to the server where temporary files are stored, if not specified, will use the system default temporary folder
Upload_max_filesize = 8m; Hope business, that is, the maximum size allowed to upload files. Default is 2M
Post_max_size = 8m; The maximum value that can be received by the form Post to PHP, including all values in the form. Default is 8M
Generally, after setting the above four parameters, uploading <=8m files is not a problem, in the network normal situation.
However, if you want to upload a large volume of >8m files, only set the above four items will certainly be able to pass.

Further configure the following parameters
Max_execution_time = 600; maximum time value per php page (seconds), default 30 seconds
Max_input_time = 600; The maximum time required for each PHP page to receive data, default 60 seconds
Memory_limit = 8m; max memory consumed per PHP page, default 8M
After modifying the above parameters, it is possible to upload large volume files under normal conditions allowed by the network.
Max_execution_time = 600
Max_input_time = 600
Memory_limit = 32m
File_uploads = On
Upload_tmp_dir =/tmp
Upload_max_filesize = 32m
Post_max_size = 32m

How to upload file size limits in PHP