1. 建立文件 ext_conf_template.txt
内 容：

# cat=basic; type=boolean; label=Use TTF: When set the captcha will get generated using TTF font rendering functions which will result in much more readable captchas
useTTF = 0

# cat=basic; type=integer; label=Image width: The width of the captcha image
imgWidth = 95

# cat=basic; type=string; label=Obfuscation color: The color of the obfuscating ellipses
obfusccolor = #c0c0c0
等 等

取值：

$newarray = unserialize($TYPO3_CONF_VARS[‘EXT’][‘extConf’][‘插件的key’]);

unserialize($GLOBALS[‘TYPO3_CONF_VARS’][‘EXT’][‘extConf’][‘toctoc_comments’]);

unserialize($GLOBALS[‘TYPO3_CONF_VARS’][‘EXT’][‘extConf’][$this->extKey]);

效 果图