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安装typecho的时候报Call to undefined function ctype_alnum() 错误 是什么原因？

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Release： 2016-06-06 20:39:43
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Fatal error: Call to undefined function ctype_alnum() in /Applications/AMPPS/www/blog/var/Typecho/Db/Query.php on line 117

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Fatal error: Call to undefined function ctype_alnum() in /Applications/AMPPS/www/blog/var/Typecho/Db/Query.php on line 117

服务器PHP 没有开启 ctype 扩展。

请问是怎么回事，我的也是这样

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php typecho
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