How to replace symbols in php regular expression

php正则替换符号的方法：首先创建一个PHP示例文件；然后通过正则表达式“preg_replace($regex,"",$other);”去除特殊字符即可。

本文操作环境：windows7系统、PHP7.1版，DELL G3电脑

php 正则替换特殊字符 和检测是否是中文

如果是只想输入中文的话，就这么写，要注意是分gb2312和utf-8的哦：

gb2312：if(!preg_match("/^[".chr(0xa1)."-".chr(0xff)."]+$/",$str)) 
utf-8 ：if(!preg_match("/^[\x{4e00}-\x{9fa5}]+$/u",$str))

去除特殊字符

$regex = "/(\/|\~|\!|\@|\#|\\$|\%|\^|\&|\*|\(|\)|\_|\+|\{|\}|\:|\<|\>|\?|\[|\]|\,|\.|\/|\;|\&#39;|\`|\-|\=|\\|\||\"){2,}/";
$other = preg_replace($regex,"",$other);
$regex = "/(，|。|！|；|：|、|’|‘|【|】|《|》|？|@|#|￥|%|&|\*|（|）|\-|\+|\=|@|…){2,}/";
$other = preg_replace($regex,"",$other);

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