/**
* 科学计数法转换成数字
* @param $num
* @param int $double
* @return int
*/
function sctonum($num, $double = 5)
{
if (false !== stripos((string)$num, "E")) {
$a = explode("e", strtolower((string)$num));
$b=bcmul($a[0], bcpow((string)10, (string)$a[1], $double), $double);
$b=$b?$b:0;
}else{
$b=0;
}
return 0;
}
