How to avoid the amount format, front-end and PHP

How to deal with the format of the amount, front-end and PHP such as 10.55 yuan, in order to unify the display of the website, should we use number_format in PHP to convert it to display it on the page, or do we say PHP only uses floatval, it is processed when the page is displayed. In JS, how to determine the format of 1, 00.00 if the page is POST to how to handle the amount, front-end and PHP

For example, 10.55 RMB. Should I use number_format in PHP to display all the websites in a unified manner and then display them on the page?
In other words, PHP only uses floatval to display the page.
In JS, how to judge the form of 1, 00.00
If the format of the page POST to PHP is 1, 00.00, what should we do.

Hope to give some suggestions on how to be more unified and secure
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Written in public functions

Where to call data

Where can I format it?

Same as js

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Currency replacement.
1. clarify the ideas,
For regular expressions, currency replacement is to find the/d at the end of the distance or separated by/d {3} +.
So at the beginning, it is (/d )(? = (/D {3}) + ($
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About POST submission

You can hide real data in the form.

You can also process it on the submit page.

We strongly recommend that you format the verification on the server.