function numtostr($num){ if (stripos($num,'e')===false) return $num; $num = trim(preg_replace('/[=\']/','',$num,1),'');//出现科学计数法，还原成字符串 $result = ; while ($num > 0){ $v = $num - floor($num / 10)*10; $num = floor($num / 10); $result = $v . $result; }//开源代码phprm.com return $result; }