Thinkphp must be php5.3 and above when installing the
The local test server is using the APPSERV integrated environment
So to upgrade PHP separately
First download the http://php.net/downloads.php Windows version of PHP above 5.3
The C:\AppServ\php5\ folder and C:\windows\php.ini are then backed up and the downloaded files are overwritten to C:\APPSERV\PHP5.
Then rename the php.ini-production to php.ini and overwrite the C:\windows\php.ini
Open and edit
Remove the following types of comments
Extension=php_curl.dll
Extension=php_gd2.dll
Extension=php_gmp.dll
Extension=php_imap.dll
Extension=php_mbstring.dll
Extension=php_exif.dll
Extension=php_mcrypt.dll
Extension=php_mysql.dll
Extension=php_pdo.dll
Extension=php_pdo_mssql.dll
Extension=php_pdo_mysql.dll
Modify Extension_dir = "c:/appserv/php5/ext/",
Restart the Apache server to complete the upgrade
Appserv Upgrading PHP