本文转自：https://stackoverflow.com/questions/4576927/convert-a-string-containing-a-number-in-scientific-notation-to-a-double-in-php

//eg $sciNotation = 2.3649E-8$number = number_format($sciNotation, 10); //Use $dec_point large enoughecho rtrim($number, ‘0‘); //Remove trailing zeros

PHP 科学计数 转 Double

原文地址：https://www.cnblogs.com/freeliver54/p/10102958.html