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开发中常常用到正则表达式，分享两个常用的正则表达式，php检查字符串是否由汉字，数字，英文字母，下划线组成， 注意这里只是针对utf-8字符集的字符串检查。 数字 汉字 英文字母：if (!preg_match("/^[\x{4e00}-\x{9fa5}A-Za-z0-9]+$/u", $str)) { echo "<font color=red>您输入的[" . $str . "]含有违法字符</font>"; } 数字 汉字 英文字母 下划线：if (!preg_match("/^[\x{4e00}-\x{9fa5}A-Za-z0-9_]+$/u", $str)) { echo "<font color=red>您输入的[" . $str . "]含有违法字符</font>"; }
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2022-08-18
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This affects all versions of package markdown-it-decorate. An attacker can add a
kostub/iosMath: Beautiful math equation rendering on iOS and MacOS
iqiukp/KPCA-MATLAB: MATLAB code for dimensionality reduction, feature extraction
mkyong/spring3-mvc-maven-annotation-hello-world: Maven + Spring 3 MVC hello worl
** DISPUTED ** Patlite NH-FB v1.46 and below was discovered to contain insuffici
微信小程序实现上下滚动消息提醒，主要是利用swiper组件来实现，swiper组件在小程序中
lizhuohua/linux-kernel-module-rust
cmaas/markdown-it-table-of-contents: A table of contents plugin for Markdown-it
Browsing the admin.html page allows the user to reset the admin password. Also a
hackl/tikz-network: A tool to visualize complex networks in LaTeX
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