427

1、使用“小数+0”。

<?php
echo'100.00'+0."
";
echo'100.01000'+0."
";
echo'100.10000'+0."
";
?>

2、用“floatval(小数)”。

<?php
echofloatval('100.00')."
";
echofloatval('100.01000')."
";
echofloatval('100.10000')."
";
?>

3、用“rtrim(rtrim(小数,'0'),'.')”。

<?php
echortrim(rtrim('100.00','0'),'.')."
";
echortrim(rtrim('100.01000','0'),'.')."
";
echortrim(rtrim('100.10000','0'),'.')."
";
?>

4、用“preg_replace('/[.]$/','',preg_replace('/0+$/','',小数)”。

正则表达式说明:
/0+$/去掉末尾多余的0
/[.]$/去掉末尾的.
echopreg_replace('/[.]$/','',preg_replace('/0+$/','','100.00'))."
";
echopreg_replace('/[.]$/','',preg_replace('/0+$/','','100.1000'))."
";
echopreg_replace('/[.]$/','',preg_replace('/0+$/','','100.010203000'))."
";
?>