Regular expressions remove 000 after the decimal point

Ask for a regular expression to remove 000 after the decimal point
Like what
8.38370000
You want the result to be 8.3837


8.0038370000
You want the result to be 8.3837


8.38370010
You want the result to be 8.3837001

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------Solution--------------------

$s =<<< TXT
8.38370000
8.0038370000
8.38370010
TXT;
echo preg_replace ('/(? <=\d) 0+\b
------Solution--------------------
(? <=\.) 0+/', ', $s);

8.3837
8.3837
8.3837001

8.0038370000 to become 8.3837 should be unreasonable.
------Solution--------------------

$string = "8.38370010";
Echo (float) $string;

8.3837001
------Solution--------------------
Preg_replace ('/[^0]0+$/', ', $s); 8.0038370000 to be 8.3837 should be an unreasonable request.

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