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怎么去除字符串中非汉字、非字母、非数字的字符

WBOY
WBOYOriginal
2016-06-13 11:49:061528browse

如何去除字符串中非汉字、非字母、非数字的字符?
如何去除字符串中非汉字、非字母、非数字、非常见标点符号(逗号,句号,反斜杠)的所有字符

引用
如:4/13の困扰(☀,∴…3???...?三Ⅲ) ??爱我中华= =扬我国威【转】

过滤后:4/13困扰9728爱我中华 扬我国威转

------解决方案--------------------
你意思是只要数字英文字母喽?
preg_match("/^[a-z0-9]+[^_]$/g",$a);没测 手写. 自己看下类库
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