正则表达式 去除小数点后面的000

$s =8.38370000
8.0038370000
8.38370010
TXT;
echo preg_replace('/(?------解决方案--------------------
(?8.3837
8.3837
8.3837001

8.0038370000 要变成 8.3837 应该是无理要求
------解决方案--------------------
$string = "8.38370010";
echo (float)$string;
8.3837001
------解决方案--------------------
preg_replace('/[^0]0+$/','',$s);8.0038370000 要变成 8.3837 应该是无理要求