1.去除多余0小数，保留2位非0小数，示例：floatval('1.00') = 1floatval('1.23') = 1.23 floatval('1.20') = 1.2
2.保留2位小数，没有则用0补齐，示例：number_format('200',2,'.','') == 200.00number_format('189.99',2,'.','') == 189.99number_format('189.9',2,'.','') == 189.90
Last modification：June 3rd, 2019 at 11:12 am
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