GD Library does not support, how to deal with

GD Library does not support, how to do?
Locally installed php5.2.5, installed and opened the GD library, but the test script is still displayed as: GD support is no ... Background verification code can not display AH ...

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Check that the php.ini location is correct
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What system. Window is found under the php.ini.

; Extension=php_gd2.dll

Remove the front semicolon. Restart Apache
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1. Phpinfo () Look at the loaded Configuration File corresponding to the path is not the php.ini you modified.
2. Check the Extension=php_gd2.dll in front of the php.ini to see if the ";" is removed.
3. Restart IIS to see if GD support is enabled in Phpinfo ().
------Solution--------------------
Workaround:
Establish the system variable PHPRC, the value is the path of php.ini

Specific as follows:
The PHP directory is d:/host, and PHP.ini is also located in this directory, as follows: My Computer-right-properties-advanced-environment variable-system variable-new variable name: PHPRC variable value:d:\host-> restart server, ok!

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