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这个正则中的x7f-xff是什么意义

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Release： 2016-06-13 12:31:35
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这个正则中的\x7f-xff是什么意思
看到一个源码中写的正则里
/\\x7f-xff][a-zA-Z0-9_\x7f-\xff]\s*\}\>/i

中的\x7f-xff代表什么意思

正则
Related labels：
ascii
source：php.cn
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