By default PHP is configured to allow files upload of size upto 2M.

We need to adjust the following PHP configuration directives:

1. upload_max_filesize: By default this value is 2M. We need to increase it to the maximum size of single file that we want to upload.
2. post_max_size: It defines the maximum size of POST data that PHP will accept. This value should be greater than ‘upload_max_filesize’.
3. memory_limit: This sets the amount of memory a PHP script is allowed to use during its execution. Set this to a value greater than ‘post_max_size’ so that PHP script can load and process the uploaded file.

cURL is a computer software project and it produces two products – libcurl and curl.

libcurl

A free and easy-to-use client-side URL transfer library, supporting DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS, TELNET and TFTP.

libcurl supports HTTPS certificates, HTTP POST, HTTP PUT, FTP uploading, kerberos, HTTP form based upload, proxies, cookies, user+password authentication, file transfer resume, http proxy tunneling and more!

curl

A command line tool for getting or sending files using URL syntax. Since curl uses libcurl, curl supports the same wide range of common Internet protocols that libcurl does.

Both cUrl and Wget can be used to download files, but the question comes which one to use. cUrl and Wget have some similarities and as well as differentiating factors, the one to use depends on your need.

If you try importing a mysql database backup file greater than 2 MB then you may receive an error – “No data was received to import. Either no file name was submitted, or the file size exceeded the maximum size permitted by your PHP configuration. See FAQ 1.16.”. No Worries! you just need to make few changes to your php.ini file.