htmlheadtitleUntitled/title/headbody?php$in="2344";if(ereg("^(-{0,1}|+{0,1})[0-9]+(.{0,1}[0-9]+)$",$in))echo "Ok!";elseecho "Sorry,Please input again!";?br很简单的嘛!/body/html(本文来源于图老师网站,更多请访问https://m.tulaoshi.com/webkaifa/)
htmlheadtitleUntitled/title/headbody?php$in="2344";if(ereg("^(-{0,1}|+{0,1})[0-9]+(.{0,1}[0-9]+)$",$in))echo "Ok!";elseecho "Sorry,Please input again!";?br很简单的嘛!/body/html(本文来源于图老师网站,更多请访问https://m.tulaoshi.com/webkaifa/)