How to increase max file size

 
max_execution_time = 30;
max_input_time = 60;
 

 
max_execution_time = 60;
max_input_time = 90;
 

 
post_max_size = 2M;
 

 
post_max_size = 4M;
 

 
max_execution_time - integer

This sets the maximum time in seconds a script is allowed to run before it is terminated by the parser. This helps prevent poorly written scripts from tying up the server. The default setting is 30. The maximum execution time is not affected by system calls, stream operations etc. Please see the set_time_limit() function for more details.
You can not change this setting with ini_set() when running in safe mode. The only workaround is to turn off safe mode or by changing the time limit in the php.ini.
Your web server can have other timeouts. E.g. Apache has Timeout directive, IIS has CGI timeout function, both default to 300 seconds. See the web server documentation for meaning of it.
 

 
max_input_time - integer

This sets the maximum time in seconds a script is allowed to parse input data, like POST, GET and file uploads.
 

  
post_max_size - integer

Sets max size of post data allowed. This setting also affects file upload. To upload large files, this value must be larger than upload_max_filesize. If memory limit is enabled by your configure script, memory_limit also affects file uploading. Generally speaking, memory_limit should be larger than post_max_size.
When an integer is used, the value is measured in bytes. You may also use shorthand notation as described in this FAQ.
If the size of post data is greater than post_max_size, the $_POST and $_FILES superglobals are empty. This can be tracked in various ways, e.g. by passing the $_GET variable to the script processing the data, i.e. <form action="edit.php?processed=1">, and then checking if $_GET['processed'] is set.