? php$num='10.4567 '; //第一个:用round ()四舍五入浮点数echoround ) $num,2 ).PHP_EOL; //10.46//第:使用sprintf格式化字符串$format_num=sprintf('%.2f ',$num )的echo $format_num.PHP_EOL; //10.46//第:使用千位组格式化数字的函数number _ format (echo number _ format ) $num,2 ).PHP_EOL; //10.46//或Echonumber_format($num,2,'.','),例如: //10.4633603359转载于www.cn blogs.com/jiqing 9006/p/11303942.html