php将科学计数法转化为正常数值输出

:[U;f\%dQBs8I0具体看下面代码：

<?php
$num = number_format(1.2313223123423E+017,'','','');//后面三个参数为空
echo $num; //输出“123132231234230000”

$num = number_format(1.2313223123423E+017); //后面三个参数为默认值
echo $num; //输出“123,132,231,234,230,000”

$num = number_format(1.2313223123423E+017,'@','#','$');//后面三个参数为分别为'@','#','$'
echo $num; //输出“123$132$231$234$230$000”
?>

3C2Z'suK$SBo;J0E)ZM0