To find ound where php.ini file, is located run this small code
phpinfo();
and search "Configuration File (php.ini) Path " row , there will be an in output window and this which will contain path of php.ini file in your PC
and in this php.ini file, change the variable size as per requirement
upload_max_filesize = (size)M
post_max_size = (size)M
new in php 5
max_input_time = (value) //in second
max_input_time variable which sets a time limit in seconds for receiving input data through POST, GET, and PUT. If your application is running over a slow link,
it is sometimes worthwhile to explore increasing this value to allow the script more time to receive input data. or you can change this variable at run time through programme
