摘要： <?php $start_time = time(); get_squre_circle_pic('logo.jpg'); $end_time = time(); echo date('i:s', $end_time - $start_time); function get_squre_circle 阅读全文

摘要： $num = 10.4567; //第一种：利用round()对浮点数进行四舍五入 echo round($num,2); //10.46 //第二种：利用sprintf格式化字符串 $format_num = sprintf("%.2f",$num); echo $format_num; //10 阅读全文