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过滤空格,

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Release: 2016-06-13 11:37:00
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过滤空格,急在线等
如$str="  沃尔克   ·   布鲁赫 ";
怎样过滤掉(沃尔克   ·   布鲁赫)前面与后面的空格,保留中间部分的空格。

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